BK50A2200
DESIGN METHODOLOGIES AND
APPLICATIONS OF MACHINE
ELEMENT DESIGN
Introduction and contents of the course
D.Sc Harri Eskelinen
Briefly about the lecturer…
• Harri Eskelinen, GSM +358 40 1979 280, email:harri.eskelinen@lut.fi
• Senior Research Scientist at LUT since 1999, before that lecturer and
assistant since 1985.
• Since 2011 nominated as an adjunct professor.
• Since 2014 Head of the Master Degree Programme in Mechanical
Engineering
• D.Sc 1999
• Main research topics:
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DFMA
MW-mechanics
Green technology in material selection
Distance learning
• Supervising following courses:
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Technical Drawing and 3D-modelling
Material Science
Engineering Design and Mechanisms
Machine Element Design
Research Methods and Methodologies
Aim of the course
• To provide understanding of functions and
dimensioning of the most important mechanisms
and their machine parts, such as:
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Springs
Shafts
Bearings
Slides
Gears
Different types of fasteners
Contents of the course
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Basic mechanisms types
Mechanisms analysis and synthesis
Analysis of some selected machine parts
Reliability based machine design and lifetime analysis
Wear phenomena
Fundamentals of systematic design approach
Practical applications from industry
Practical arrangements
• Teaching and teaching material is divided into
three main sections:
1
2
Lectures
Text Books
Special topics of
Engineering design
- Systematic Design
- Mechanisms analysis
and synthesis
- Wear phenomena
-Erdman:Fundamentals
of mechanisms design
-Norton: Design aspects
of some important
machine elements
3
Exercises and
Teamwork
Practical applications
from industry
CONTENT
Spur gears
Belt drives
Rolling bearings
Roller chain drives
Introduction
Stress and deflection analysis
Helical compression springs
Power transmission shafts
BK50A2200
DESIGN METHODOLOGIES
AND APPLICATIONS OF
MACHINE ELEMENT DESIGN
Glued joints
Distribution analysis
Rotational shaft sealing washers
Shaft-hub-joints with conical geometry
Shaft keys
Types of lubrication
Worm gears
Wear phenomena
INTRODUCTION
Main criteria dealing with
lifetime evaluation
Main criteria dealing with
reliability
• S-N-curves
• fatigue failure
•crack propagation
• lifetime evaluation
equations
• Distributions
- loads
- load bearing capacity
- dimensions
- material properties
• Distribution analysis
- curve fitting
- overlapping distributions
• Safety factors
• Failure mode matrixes and
fault tree analysis
Main criteria dealing with
strength
Main criteria dealing with
wear
• combined loading cases
• dynamic/static loads
• impact loading
• stress concentrations
and peaks
• brittle and ductile
materials
• dynamic contact
stresses
• Adhesive wear
• Abrasive wear
• Tribochemical wear
• Surface fatigue
• Pitting
• Corrosion phenomena
• Fretting
• Cavitation, Erosion
•Peeling
BK50A2200 DESIGN METHODOLOGIES AND APPLICATIONS OF MACHINE ELEMENT DESIGN
Schedule / autumn semester 2014 /
1ST PERIOD: LECTURES ON FRIDAYS AT 12.15-14.00 IN ROOM 213 IN STUDENTS’ UNION HOUSE
Week
Lectures
(Fridays 12.15-14.00, room 213 Students’ Union House)
Homework
(Discussed during the lectures)
37
(8.9.- 14.9.2014)
Introduction and guidelines of the university course module
BK50A2200
38
(15.9.- 21.9.2014)
L1. Fundamentals of the systematic
design approach
39
(22.9.- 28.9.2014)
L2. Introduction to the textbook:
“Norton: Machine Design”
Discussion of the homework results:
E1. Comparison of different design approaches and requirement lists
40
(29.9.- 5.10.2014)
L3. Reliability based machine design and lifetime analysis
Discussion of the homework results::
E2. Integration of strength, reliability, lifetime and wear analyses
41
(6.10.- 12.10.2014)
L4. Wear phenomena
Discussion of the homework results:
E3. Reliability based machine design
42
(13.10.-19.10.2014)
L5. Machine elements I
L6. Machine elements II
Discussion of the homework results:
E4. Wear phenomena
L7. Machine elements III
L8. Machine elements IV
Discussion of the homework results:
E5. Shafts, bearings, shaft seals
E6. Gears
Organization of the project team and working
groups
(43)
(20.10.- 26.10.2014)
No lectures nor exercises (Exam week)
2ND PERIOD: PROJECT WORK ON FRIDAYS AT 8.15-10.00 IN ROOM 213 IN STUDENTS’ UNION HOUSE
Meeting number:
Theme
44
(27.10.- 2.11.2014)
Official project meeting I
Requirement list
45
(3.11.- 9.11.2014)
Official project meeting II
Strength
46
(10.11.- 16.11.2014)
Official project meeting III
Wear
47
(17.11.- 23.11.2014)
Official project meeting IV
Reliability
48
(24.11.- 30.11.2014)
Official project meeting V
Lifetime
49
(1.12.- 7.12.2014)
Project/Team work
Presentations of the team works
Tentative project meeting I
(arranged by the project manager)
Tentative project meeting II
(arranged by the project manager)
Exercises and teamwork
• Teamwork
– Project work, the whole class forms the project team, which consists
of smaller groups (4-5 students/group)
– Weekly project meetings, Patricia Nyamekye has been nominated as
the project manager and she will invite the meetings
• Brief exercises
– Brief exercises will be giving after each lecture and the answers will be
discussed at next week’s lectures
– Based on the topic of each lecture
– All kind of source material is allowed
– 100% requirement for acceptance!
• Presentations of the results of the teamwork (project work)
– Week 49
– Topics will be decided in details during the project meetings
• No written exam, the grading is based on the results of exercises
and team works.
Project work
Project manager
Team leader 1
Team leader 2
Team leader 3
Team leader 4
Team 1
Gears
Team 2
Bearings
Team 3
Seals
Team 4
Shafts and
Shaft-hub-joints
Team leader 5
Team 5
”Accessories”
- belt-drives
- chain-drives
- clutches
- etc.
Power transmission capacity
Wear
Lifetime
Reliability
Project manager
Team leader 1
Team leader 2
Team leader 3
Team leader 4
Team 1
Gears
Team 2
Bearings
Team 3
Seals
Team 4
Shafts and
Shaft-hub-joints
Team members 1…4
Strength
Wear
Lifetime
Reliability
Team members 1…4
Strength
Wear
Lifetime
Reliability
Team members 1…4
Strength
Wear
Lifetime
Reliability
Team members 1…4
Strength
Wear
Lifetime
Reliability
Team leader 5
Team 5
”Accessories”
- belt-drives
- chain-drives
- clutches
- etc.
Team members 1…4
Strength
Wear
Lifetime
Reliability
Strenght
Wear
Lifetime
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Machine element
Team leaders’ task is to take care of the overlapping areas
Power transmission capacity
Wear and lifetime
Project manager’s task is to take care of the overlapping areas
and the summarized reliability aspects
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