ME4 Projects 2008.doc A. Title: Setting up and Managing Life Cycle Analysis within a small company Description: It is envisaged that this would involve the researching the resource implications for the company and methodology by which such a programme could be implemented. Life Cycle Inventory and the programme management will be addressed as well as sources, type and accuracy of data to be included. The Project will involve: Researching current methodology for such programmes. Investigating the application of LCA within a small company. Devising a programme for LCA implementation. Recommendations on how best a LCA programme might be implemented and managed within a small company. B. Title: European Legeslation for the Recycling of Automobiles – What is the current state of Implementation of Legislation in Ireland? Description: It is envisaged that this would involve researching European Legislation on the subject investigating how, who if any is practically implementing the recommendations in Ireland. What are the long term ecological and economic implications for the country? The project should address motor vehicle recycling methodology and associated energy requirements. Some details of the time and procedure required to dismantle a part of a vehicle (e.g., a door) should be investigated. The Project will involve: Researching existing European Legislation. Investigate the application of legislation in this country. Research the where the country is with regard to motor vehicle recycling. Develop and research into motor vehicle recycling and the ecological implications this may have for the future in Ireland. Carry out a practical dismantling of a some specified part of a motor vehicle and devising methodology and time requirements. 1 ME4 Projects 2008.doc C: Anti Tailgating device/brakeing control system Description: A cause of many accidents is the issue of tailgating, a practice which reduces time available to react in case of an emergency. The objective of this project is devise system to discourage / prevent tailgating both front and rear. In relation to the car in front this may involve audible warning signal alternately direct application of the brakes may be considered. The safe driving distance will be speed dependant. The Project will involve: Reviewing of recommended safe driving distances. Research the developments in self driving vehicles. Simulation of braking under various conditions Design of a brake control system to prevent based on vehicle speed and proximity to vehicle in front. Simulation of the resulting design. 2 ME4 Projects 2008.doc 1. Title: Machining time estimation based on NC prog and m/c dynamics. Description: When generating CNC machining programs a simple estimate is made of the machining time based on length of movement and the programmed feed rate. This does not take into account the acceleration/deceleration at the beginning and end of each movement. This is even more significant when using high speed milling machines. The object of this project is to develop software capable of accurately estimating machining time based on actual machine dynamics. The Project will involve: Development of Software in a standard programming language. Investigating of machines capabilities / performance. 2. Title: Automating the design of standard components using AutoCAD. Description: The objective of this project is to automate the design of standard components (to be selected) using AutoCAD. Typical compents would be window frames, custom kitchen doors. The purpose of this exercise is to automate the production of drawings for standard components using a number of primary dimensions. Such dimension may be supplied in spreadsheet form. The Project will involve: AutoCAD customisation using designated programming language. Extraction of data from Excel spreadsheet. Design of dialog boxes. 3. Title: Automated modelling of standard components. Description: Sola lenses make lenses for glasses. Mould insert is required for each lens type. The critical dimensions of this insert are provided in spreadsheet. Currently the insert is modelled manually by reading the data from the spreadsheet. The objective of this project is to automate this process of modelling these inserts by used Visual Basic customisation tool to: To extract data from a spreadsheet To drive solid edge to automatically create the necessary protrusions/cutouts to produce the finished component model. The Project will involve: Familiarisation with Visual Basic programming tools Familiarisation with Solid Edge software development kit. 3 ME4 Projects 2008.doc Using ‘Dynamic data exchange’ to extract data from excel spreadsheet. Interfacing with Solid Edge to drive the modelling process. 4. Title: Automating the application of tolerances. Description: The objective of this project is to customises AutoCAD (or other) to Automate the application of tolerances. This would involve among other aspects the application of tolerance base on fit type (H7) and feature size, hole or shaft basis. This software would select the appropriate tolerance based on the above information. The Project will involve: Programming to customise CAD program 5. Title: Automated gear train design. Description: A number of tools are available to automate the design of standard components. For example some CAD program include a toolbox to enable standard components such as nuts, bolts, gears and bearings etc. to be created by entry of a number of standard parameters. While tools exist to automate the modelling gears, no tool exists to design a gear train. The objective of this project is to develop tools to design gear train design based on a variety of inputs. In the first instance this software would determine appropriate gear design for the transmission of a specific torque and gear ratio for standard spur gears. A further enhancement may be to add extra functionality to cater for different gear types to cater for different shaft orientations. The Project will involve: Familiarisation with Visual Basic programming tools Familiarisation with Solid Edge software development kit. Interfacing with Solid Edge to drive the modelling process. 6. Title: Analisys of forces in Front loader/other mechanism. Description: The objective the project is to use working model to analyse the forces in your selected mechanism. This will require the simulation of the mechanism by putting it through is normal sequence of operation. Preliminary investigation can take place in 2d followed by simulation in 3d. This project should be done in relation to an actual product so it will be required to source actual product inf. The Project will involve: Mechanism simulation in working model/Cosmos Marcro program to implement the correct sequence of movement Stress analisys of critical components 4 ME4 Projects 2008.doc Proposals for improvement of design Above based on Stira folding attic stairs Mechanism of your choice 7. Title: Analisys of Vehicle suspension and factors affecting performance. Description: The object of the above project is the carry out a student of vehicle suspension to study the factors affecting their performance, including spring stiffness, damping and suspension geometry. The project will require the simulation of suspension behaviour and a study of the effect of various parameter and various surface. The Project will involve: Mechanism simulation in working model/Cosmos Marcro program generation assorted surface types Detailed analysis of the parameters. 8. Title: Modeling and simulation of single cylinder engine. Description: The purpose of this project is to carry out a simulation of an engine using Cosmos motion. This simulation should also show the correct valve movement. Initial simulation will be based applying movement to the input shaft. Following this simulation may be created based on the controlled application of a downward to the top of the piston. The concept of variable Valve timing may be worth some investigation. The Project will involve: Mechanism simulation in working model/Cosmos Marcro program to regulate the piston downward force. 9. Title: Modeling and simulation of assorted engine configuarations. Description: One characteristic which sets certain engine types apart from other is the smoothness. E.g. V8. The objective of this project is to simulate a variety of engine configuration and in investigate the relative the smoothness of each engine type. The Project will involve: Mechanism simulation in working model/Cosmos works Analisys of forces generated. 10. Title: Centrifugal clutch. Description: The purpose of this exercise is to create a simulation of a centrifugal clutch. A centrifugal clutch is clutch which engages automatically when radially moving spring loaded shoes (attached to the input shaft) come into contact with an outer rim attached to the output shaft. The purpose of this project is the analyse clutch performance and the factors which affect it. 5 ME4 Projects 2008.doc The Project will involve: Modelling/simulating of a variety of centrifugal clutch configurations Analysing the effect of varying parameter. Perform a critical evaluation of the Cosmos motion capabilities. 11. Title: Clutch/brake simulation. Description: Use cosmos motion to analyse brake or clutch performance. Analyse the above product in a variety of configurations. The Project will involve: Modelling/simulating of a variety of brake configurations Analysing the effect of varying parameter. Evaluate Cosmos motion ability to realistically simulate the above. 12. Title: Door closing mechanism Description A number of different types of spring loaded mechanisms exist for doors. Some of the mechanisms return the door to the closed position regardless of the position which it is opened. Other door mechanisms allow a door to remain open when pushed to fully open position. The purpose of the project is to design a door closing mechanism which is switch able between, catching in the open position and not catching in the open position. This challenge offers good potential for the design of a novel mechanism to achieve this task. Project activities will include. Simulation of the mechanism using Working Model Analysis of component stresses using finite element analysis. Mathematical analysis of the final mechanism using manual calculation. 13. Title: Automatic the generation of robot program Description: The purpose of this project is to automate the generation robot programs. In its simplest form a simple 2d cad drawing could be used to provide the data necessary to perform vertical insertion. A more advance implementation would involve the use of a 3d cad model to provide the necessary geometric information necessary to perform assembly operations at various angles. Project activities will include. CAD customisation. Computer programming 6 ME4 Projects 2008.doc 14. Title: Microscribe Description: Similar in principle to a CMM the microscribe uses a digitising probe at the end of an articulated arm to measure components. Measurements may be either by digitising discrete points or by scanning a continuous line of points. Its primary purpose is for reverse engineering. The purpose of this project is the develop software capable in interfacing with the micros to enable it to measure 2D geometric features (and possibly 3d) and the evaluate dimension information. The Project will involve: Computer programming, Geometric modelling lines, arc and circles. 15. Title: Design of custom made product using scan data Description: The objective of this project is to explore the area of custom made personal products based on human measurements obtained using scan data. Typical areas using these techniques include hearing aids, custom made shoe soles. etc The Project will involve: Investigation of reverse engineering technologies Exploration of where this technology is used for personal products. Implementation and evaluation in respect of a hearing aid / shoe sole. 16. Title: Design of a Aluminium can crusher Description: The objective of this project is to design an Aluminium can crusher base on a comprehensive engineering analysis using both the computer simulation and manual calculation. The Project will involve: Determination of the load displacement curve. Design of the device in question Full simulation of the crushing using WM2D and/or Cosmos Motion. Stress analysis of the design using Cosmos Works. 17. Title: Measurement of Aerofoil surface pressure Description: Lift in an aircraft results from pressure difference between top and bottom surfaces. The objective of the project is to construct a model with a series of holes along it surface to which pressure gauges will be attached in order to measure surface pressure. This model will be tested in winds of various speeds in order to measure the pressure difference with give rise to ‘lift’. It is anticipated that this/these model/s will be made using rapid prototyping. Related project: Design of a Rig to measure forces on Aerofoil in wind tunnel. 7 ME4 Projects 2008.doc 18. Alternative Fuels For Automotive Applications The project involves research into the following areas: specific fuels available, energy requirements to produce them (fuel required for agricultural machinery, fuel required for purification processes, for example), land and processing plants required to produce fuel, calorific value, storage, engine modifications, combustion issues, pollutants produced, distribution, legislation, future plans, data relating to different countries. 19. Alternative Fuels For Space Heading This is a similar brief to that of the project “alternative fuels for automotive applications”, but would include fuels such as wood pellets. 20. Renewable Energy Investigation into renewable energy sources; wind, solar, tidal etc. This will involve research into the various technologies, cost of commissioning plant, output capacity (comparing to conventional oil/coal burning power plant), environmental issues, sites, legislation. 21. Energy From Biomass Energy can be produced from waste in two main ways; Energy from waste incineration. Example of issues to investigate: capacity, environmental impact. Energy produced by biogas from decomposition process. Examples of issues to investigate: gas quantity, composition, pollutants, economics for piping, running engine (engine modifications). 22. Domestic Heat Pump With fuel consumption being a major issue, heat pumps are being installed in many homes in Ireland (and elsewhere). These operate on the refrigeration cycle. The project involves research into the following areas: heat pump types, operation, coefficient of performance, climate response, cost of installation and running, government grants. The project could also include the estimated payback period for different technologies for a modern insulated detached house. 23. Program To Determine Heat Flow and Temperature Distribution Use a programming language such as visual basic to write a program to calculate and visually display the heat flow and temperature distribution in a variety of situations, e.g. 1-Dimensional steady state, 1-Dimensional transient, 2-Dimensional steady state, etc. A computer program could be developed to model the heat transfer equipment in the college. Another area of programming would be to use the computer application COSMOS to compare results with those produced from the visual basic program. 24. Gyroscopic Torque Apparatus 8 ME4 Projects 2008.doc Design and build apparatus to demonstrate gyroscopic torque. This is the torque produced when the axis of a rotating system is itself rotated. It is envisaged the apparatus will be a flywheel enclosed in a Perspex case for safety, and driven up to speed by an internal motor or by an external motor (maybe hand-drill with designed attachment). The device has to be able to be held by handles in line with the flywheel axis. The ability to display the flywheel speed and perhaps gyroscopic torque would be desirable. Related activity: Gyroscope simulation using Cosmos Motion 3D 25. Impact of Jet Apparatus When a mass changes direction a force acts. The same is true when a fluid mass changes direction. A jet of water deflected by a surface will exert a force on the surface. A pelton wheel (water wheel) and hydroelectric generator work on this principle. The project is to design and build apparatus to demonstrate the force produced by a jet impacting on a surface. A method of measuring and varying the diameter and velocity of the jet would have to be determined, and a method for measuring the resultant force also incorporated. Another aspect may be to incorporate the facility to attach a turbine and measure the torque output of the turbine. 26. Force on Submerged Surface Apparatus Due to the weight of a static fluid, a surface in contact with the fluid will experience a force. This can be quantified by theory. The project is to design and build apparatus to demonstrate the resultant force on a submerged surface. The apparatus for a flat surface could be built, with the apparatus for a curved surface designed. Or depending on the complexity, a general purpose apparatus for measuring a force on either a flat or curved surface could be built. 27. Piston/Cylinder Pressure and Temperature Readings The work done in compressing or expanding a gas depends on the heat transfer that occurs. These processes have to be modelled on experimental data. The project is to design and build a test rig consisting of a piston/cylinder driven by a motor with sensors attached to measure the pressure and temperature against crank angle. The data is then to be logged on a computer, and the pressure/crank angle and temperature/crank angle graphs plotted. The work done can then be determined. This can be compared with the work input from the motor and the mechanical efficiency determined. Mathematical curves can be fitted to the experimental data for different compression and expansion processes, and used to model the processes. 28. Variation of Boiling Point with Pressure Apparatus We think of the boiling point of water as 100°C. This is the temperature at which water will boil at atmospheric pressure. If we increase the pressure the water is exposed to, the boiling temperature (saturation temperature) will increase. This is the principle of the pressure cooker. If the pressure is decreased, the saturation temperature will also decrease. 9 ME4 Projects 2008.doc The project is to design and build apparatus to determine and measure the saturation temperature/saturation pressure relationship for H2O over a limited pressure range. The H2O inside the device should be seen to observe the bubbling (boiling) water. The pressure and temperature have to be measured, and a means of pressurising and evacuating the vessel incorporated. 29. Investigation into the Design of a Vacuum Cleaner Driven Brush The project is to design an attachment for a vacuum cleaner that incorporates a brush to agitate the dirt; the movement of the brush being driven by an impellor turned by the air flow to the vacuum cleaner. This will involve designing concepts, optimising the turbine, determining the torque/speed relationship and building a prototype. 30. General Purpose Attachment For Wind Tunnel Testing The school of science possesses a wind tunnel. The project is to design and build a general purpose attachment to fit the wind tunnel, to enable the easy mounting of models, and measurement of the forces (drag and lift). 31. Pressure Distribution Over a Surface in a Flowing Fluid. The pressure acting on a surface exposed to a flowing fluid will vary depending on the surface geometry and flow characteristics. The project is to produce various surface geometries (standard shapes; sphere, aerofoil, and more complex shapes, automobile profile, for example) using the rapid prototyping machine. The surfaces are to incorporate holes to obtain pressure tapping. The associated pressure reading devices are to be acquired and the pressure distribution over the surface produced. This data can then be used to determine resulting forces. 32. Design of Device to measure Acceleration An accelerometer is a device for measuring acceleration. This project is to research accelerometers: types, principle of operation, range, size, method of displaying acceleration (can it be wireless?) and cost. A suitable accelerometer may then be purchased for measuring the acceleration of a variety of objects. Alternatively a simple accelerometer can be designed and built and used to obtain data for a variety of accelerated motion. 10 ME4 Projects 2008.doc 33. Title: Airport trolley Description: The objective of this project is to design an airport trolley to overcome the difficulties of manoeuvring a long chain of interlocked trolleys when being moved by airport staff. It is anticipated that the final design would consist of a mechanism, which allows trolleys to interlock in such a manner that allows a steering motion applied to the rear trolley to be transferred through linkages to the steering wheels of the front trolley. Design issues to be explored. To design a novel mechanism to achieve the above objective Perform mechanical strength analisys ensure a robust solution. 34. Title: Bar code mobile phone (elec) Description: Despite the convenience of 'pay as you go' mobile phones one major disadvantage is the tedious process of toping up credit by entering the 10 digit number. In this project it is proposed to design a mobile phone with built in bar code reader. If top up slips were then provided with the number coded in bar code form, this would enable the phone to be topped by simply swiping the card over the reader eliminating the need to enter the number by hand. Design issues to be explored. Investigation of bar coding standards Investigate the feasibility of developing a compact bar code reader Demonstration principle by printing and reading a bar code. See symbol data-wand for product which uses similar principal 35. Title: Bar code reservation system Description: When making reservation on line for either flights or concerts the user is usually given a unique booking reference number. This however requires human intervention to read and verify this number. The objective of this exercise it to develop a system which prints a unique bar code on a reservation, this could then be presented to a bar code reader a the relevant venue this allowing automated access at venues. Design issues to be explored. Investigation of bar coding standards Devise the necessary control software to monitor the issuing of reservation and to prevent any given bar code being used more than once. Demonstration principle by printing and reading a bar code See symbol data-wand for product which uses similar principal 11 ME4 Projects 2008.doc 36. Title: Oil level detection system Description: The objective of this device is to prevent a domestic oil heating system running dry and becoming air locked. Other features could also be included in such a system. Design issues to be explored. Investigate methods of level detection e.g. ball cock or pressure sensing Resolution of measure e.g. Full / empty or % contents. Determine how device should be attached to tank i.e. Method of display 37. Title: Automatic guitar tuner Description: The objective of this project is to design an automatic guitar tuner with a motorised drive mechanism which tightens a guitar string automatically to achieve the desired pitch. Design issues to be explored. Tuner location: top beside tuning heads or at bottom in body. Tuning technique, tension alone or sound based Mechanism for switching between strings, manual or automatic Gearing system to be used Full engineering analysis / simulation required. 38. Title: Domestic shower Description: The purpose of this project is to improve existing domestic showers (in which temperature control can be difficult) to produce a shower, which delivers water at a consistent temperature and pressure. The project will require the analisys of fluid flow and thermodynamic etc. Features of the product might include Powerfull motor for consistent pressure delivery Electric water heating where supply is cold. Heat recovery from drain water 39. Title: Compact Portable speed camera (elec) Description: To investigate the principal of and to design a compact speed camera. A major disadvantage of speed camera is that their location is well known. The objective of this project is to develop a compact speed camera which can be easily transported and attached to any telegraph pole or sign. Design issues to be explored. Investigate and compare technologies to measure speed detection. Determine the information all data which must be recorded. 12 ME4 Projects 2008.doc 40. Title: Black box for Cars (elec) Description: When a crash occurs, it can often be difficult to determine the precise circumstances of an accident i.e. who was responsible. If car were fitted with black boxes similar to those used in airplanes these could be useful in determining the precise circumstances of an accident. The objective is this project is design a black box for cars. To do this you will need to determine the precise functionality and the type of information it will record. Issues to be explored. What information should be recorded, eg speed, vehicle dynamics, sound, weather condition, video. What duration should be recorded i.e. should there be a limit on the amount of information obtain leading up to accident. You should consider whether the device can be inspected at any time or have access to the data limited to crash situations. 41. Title: Shorts dispenser logger Description: The objective of this exercise is to develop a system for monitoring the dispensing of shorts in a busy pub. The client requires this as a means of stock control and to ensure that the quantity dispensed is equal to the quantity recorded. It is anticipated that the device would be fitted with a switch (mechanical or other). This would be connected to a central logging station, either by wire, or blue tooth. Design issues to be explored include. How to fit the switch to the dispenser How to account for the fact that the optic is removed during bottle change. How to account for device sticking causing a possible miss count. Where should the logger be, and how to communicate with it. 42. Title: Domestic lotto ticket checker Description: It can be tedious checking lottery tickets especially when a number of draws have been entered. The objective of the project is to develop a domestic lotto ticket checking system. This project will involve. Determination of a means of obtaining the winning numbers e.g. Web Selection of a suitable bar code reader Determination of the bar code syntax used. Development of software to compare the bar code data with winining Design of an enclosure the house the final product. 13 ME4 Projects 2008.doc 43. Title: Fully Automated wine bottle opener Description: The object of this project is to develop automated wine bottle opener either table mounted or hand held. The primary objective is to develop a mechanism to successfully remove and dispose of the cork. Design issues to be explored. Desk top or hand held Item for the disabled. Mechanism required for creating spiral forward motion with linear retraction. 44. Title: Strain gauge apparatus. Description The objective of this project is design a piece of equipment to illustrate the use of strain gauges. A range of fundamental principles to be illustrated through the application of strain gauges to a shaft capable of being subjected to Pure bending, Pure torsion and mixed bending and torsion. The project will necessitate devising a means of interfacing with a PC and the development of a simple software interface for displaying the strain gauge values. Analisys capabilities of the device should include Measurement of bending using single/dual gauge Measurement of poisons ratio Measurement of Pure torsion using 45 degree strain gauges Measurement of mixed loading using strain gauges rosettes. A wide variety of strain gauges are available on www.vishay.com 45. Title: Analysis of Aerofoil Sections Description The objective of the project is to construct a test rig to analyse the forces generated by airflow over an aerofoil section using IT wind tunnel. Project activities Design a device for supporting an aerofoil section within the tunnel incorporating a facility for tilting the section to any angle. Devise some method of force measurement in order to measure drag and lift generated by airflow over the section. Carry out experiments to analyse the effect of airflow rate and angle of aerofoil section on the lift generated. Other Fluids projects Analisys of flow / pressure drop in pipes Analisys fo flow in a venturi Analisys of flow around solid bodies /golf ball A study of vehicle aerodynamics and wind tunnel testing 14 ME4 Projects 2008.doc 46. Title: Vibration analisys Description Vibration is a phenomenon, which affects many products. It is important for engineers/designers to understand what causes vibration and to understand how it can be minimised or eradicated. The purpose of this project is to set up the new vibration apparatus, explore its capabilities and limitations and to devise a number of vibration experiments to illustrate various concepts. Aspect of the project will include. Commissioning of the vibration apparatus Determining its capabilities and operating range Devise a variety of experiments to illustrate, free vibration, damped vibration, resonance, single mass/double mass vibration, in phase and out of phase. Develop a number of worksheet for the experiments devised Create working model simulations of the various experiments Illustrate the mathematical solution of the various experiments. Solve a real life vibration problem e.g. suspension etc 47. Title: Upgrade Vibration analisys apparatus Description The vibration analisys apparatus is designed using old technology and its means of displacement measurement is a pen an roll of paper. The objective of this project is to instrument the apparatus to enable it to capture data electronically. Aspect of the project will include. Selection or rotary encoder to monitor drive motor movement Selection of linear encoder to measure displacement of the mass. Selection of a data acquisition card to process above inputs Selection of appropriate software to analyse above data Possible software development to automated the process of the above data. 48. Title: Design of a system for remote marking of games pitches The objective is that the student would research and design a solution to the problem of remote marking out of hurling football soccer etc pitches. The solution should show levels complexity which could and probably should involve: The system to mark the pitch involving the application of the marking out paint The control of the machine movements to move the device round the pitch as appropriate The remote positioning of the system using GPS or infra red or equivalent The accommodation of various pitch size and types on the one control system The movement of the machine using electric motors or engine Ensuring that unevenness and pitch surface irregularities do not affect the pitch markings etc. 15 ME4 Projects 2008.doc Work would involve system design, and analysis using CAD etc, electronics or machine control etc, investigation of materials, pitch information, material selection paint application This is a potential group project, or can be split into components as above. 49. Title: Design of a system for measurement of 2D planar strain using video analysis during testing of materials This would involve the development of an automated system to collect video data during materials testing process, the product material needs to be adequately marked so progressive displacements can be tracked from video frame to frame, and the movement of these markers calculated on a frame by frame basis to establish the strain to the point of fracture. Factors to be considered are: The limitations on the size of specimen The method of setup, and lighting of the specimen, the collection of data and the frame by frame analysis for calculation of strain (well established formulae are available, but need to be programmed using a stand alone system or into something like Matrox Inspector Software) All facilities etc area available in house to do this project. 50. Title: An Investigation of factors affecting the process of cutting CIBA Tool CIBA Tool is used in product mock-ups' and can be used to produce good high quality surface finishes but there are many factors which have an effect on the process like effects of variation in cutting speed, cutting depths, material variations, cutting tool materials, coolant types (maybe not), and cutting tool geometries on the cutting forces when cutting CIBA tool, with a view to assessing the viability of use of extremely small cutting diameter tools and or manufacturing extremely thin wall sections in machined parts. Factors to be considered are: Tool condition, tool materials, Cutting energies, surface finish etc etc. 51. Title: CNC Machining and Manufacture of high quality thin walled products from FDM models. Despite the fact that FDM modelling produces thin wall features of adequate quality for inter-surface representation the external surface on free form surface of these products is of poor quality for assessment of surface geometry. However it is not possible to produce interior thin walled surfaces on CIBA Tool. In this project the student will investigate the following: 16 ME4 Projects 2008.doc Manufacture of 3D surfaces and thin walled products using FDM Techniques for setup of such products on a CNC machine Generation for NC Code and machining of the exterior surface to produce a part with complex 3d exterior high quality surfaces 52. Title: Investigation of the factors associated with the use of halo pins in the fixation of halo rings to human skulls for stabilisation of neck fractures Halo rings are used in the fixation of vertebrae fractures post operative treatment to support the skull and prevent skull movement during normal activity. The halo ring is attached to the patient skull using halo pins. These pins have been shown to be prone to loosening during patient movement and allow movement of the skull which can have effects on patient trauma and healing time if not retightened. The student will investigate the various factors associated with various halo pin designs including the torquing of the pins during tightening, the pin bone interface, use of lubricants, the pin materials, and the effects of the pin forces on the bone. 53. Title: Design of an in vivo uniaxial/biaxial skin tester This would involve the design of a device, which can attach to an area of skin, say the forearm and apply a uniaxial/biaxial strain to it. The force applied to the skin surface will be measured and recorded. The strain applied to the skin will also be recorded. Such a device would be very useful in measuring the mechanical properties of skin. The project would involve: performing a lit review on existing testers designing and building a rig use of LabView to record data performing experimental tests to validate the rig possibly some FEA work. 54. Title: Design of an in vitro uniaxial/biaxial skin tester This project would be similar to the above except the devise would perform uniaxial/biaxial tests on excised skin samples. The force and strain applied to the skin sample would be measured and recorded. The project would involve performing a lit review on existing testers; designing and building a rig use of LabView to record data performing experimental tests to validate the rig 17 ME4 Projects 2008.doc possibly some FEA work. 55. Title: Specification of a suitable material to use as a skin substitute in experimental tests Skin is a complex multi-layer material, which exhibits a highly non-linear stress/strain curve. In addition to this, skin properties vary from person to person and between different areas on the body. Because of its high variability, skin is a difficult material to perform experiments on. Excised skin degrades rapidly with time. A material that contained similar mechanical properties to skin would be very useful in experimental work. It would also be advantageous for the material to have the same look and feel of skin and have similar wrinkling characteristics of skin. The project would involve performing a lit review on properties of skin and potential substitute materials Performing stress/strain tests on skin and substitute materials Evaluating material in terms of it’s potential to replace skin in an experiment 18 ME4 Projects 2008.doc 19