UNIVERSITI TEKNIKAL MALAYSIA MELAKA
FACULTY OF MECHANICAL ENGINEERING
MECHANICAL ENGINEERING LABORATORY III
BMCG 3011
PROPOSAL
NAME:
MUHAMMAD DANIAL HAIKAL BIN MOHD SHAHREL
MATRIC NO:
B042010090
CLASS SECTION:
3BMCG S2
LAB GROUP:
GROUP D
REPORT SUBMISSION
DATE:
16 APRIL 2023
SEMESTER/SESSION: 2-2022/2023
EXPERIMENT TITLE: CURVED BARS AND DAVITS TEST
LECTURER: EN. IMRAN SYAKIR BIN MOHAMMAD
LECTURER REMARKS
EVALUATION
Objectives and Hypothesis
Statement (2 Marks)
Methodology (2 Marks)
Expected Results & Conclusions
(1 Mark)
TOTAL
OBJECTIVES
The objective of this experiment is:
1. To determine the deformation of a structure in terms of four test structures; quarter circle,
semicircle, curved davit and angled davit in horizontal and vertical deflections.
2. To compare the experimental value with the theoretical results.
3. To study the relationship between load and the deflection of curve.
4. To study the relationship between the shape of curved bar and deflection of the curved beams.
HYPOTHESIS STATEMENT
A beam or bar's deflection frequently needs to be restricted in order to maintain the integrity and stability of a
structure or machine. In addition, code requirements frequently stipulate that these members must not shake or
deflect significantly while supporting the appropriate loading in a safe manner.
METHODOLOGY
Procedures
1. Prepare the equipment to test the semicircle structure as the first test specimen.
2. The average width and thickness of the test structure cross section were measured and recorded.
Then the second moment of area (I) of the cross section calculated.
3. The load hanger were attached to the free end of the test structure.
4. The dial indicator adjusted in positions, so it is in contact with the boss horizontally and
vertically. The indicator reading was set to zero.
5. A weight of 100 g applied to the load hanger. The reading of both dial indicators were recorded.
6. The weight increased up to 500 gm in 100 gm increments, tapping the test frame each
time. The reading of both dial indicators recorded. All loads and deflections
reading recorded in Table 2.
7. The above procedures repeated with other structures (quarter circle, curved and angle
davits).
Figure 1 Test frame
EXPECTED RESULT
The results will be determined by observing the vertical and horizontal dial indicators for 4 different shape of
specimens and loads up to 500g increments.
Table 1 Theoretical formula for vertical and horizontal deflection
Table 2 Expected result
SHAPE
a) Semi circle
b) Quarter circle
c) Curved Davit
d) Angle Davit
LOAD (g)
100
200
300
400
500
100
200
300
400
500
100
200
300
400
500
100
200
300
400
500
VERTICAL
DEFLECTIONS
(mm)
0.96
2.11
3.07
4.10
4.85
0.44
1.52
2.15
2.80
3.95
0.39
0.64
1.03
1.32
0.62
0.26
0.55
0.77
1.17
1.44
HORIZONTAL
DEFLECTIONS
(mm)
1.21
2.69
3.87
5.33
6.32
0.26
0.93
1.30
1.68
2.38
0.47
0.73
1.20
1.54
1.89
0.35
0.76
1.03
1.6
1.97
CONCLUSION
In conclusion, the semicircle beam deflects significantly more than the structure. This is because the geometrical
design of the beam gives the quarter-circle beam far greater support to bear the load applied to it.