ENGINEERING FACULTY
DEPARTMENT OF MECHANICAL ENGINEERING
Laboratory Report 2
Torsion Test
Subject: STL201S
Date: 14 March 2013
Signed:
Signed:
Signed:
Signed:
I (We) swear that this is the original work of the author(s). All information obtained directly or indirectly from other sources has been fully acknowledged.
Evaluation Criteria
Report Format:
Cover page, signatures, due date met, layout, appendix, referencing
5
Discussion:
Are the results as they were obtained described properly, Are trends, deviation from the trends identified and described properly, Are relationships between variables identified in terms of their mathematical definition
10
Conclusions:
Has a conclusion been reached, Does the conclusions relate to the aim of the experiment, Is the result compared to what was expected.
5
Readings & Results:
Are the readings and results (tabulated) in an orderly manner? Axes scaled and labelled properly, Experimental points plotted correctly (trends)
15
Calculations:
Are the results calculated correctly? Is the method of the calculations explained? Is the method correct?
5
Total
40
Comments
TABLE OF CONTENTS
Aim of the Experiment
Theoretical Background
Experimental Apparatus
Experimental Procedure
Results and Calculations
Discussion of Results
Conclusion
Bibliography/references
Appendix A: Experimental Readings and Calculations
Figure 1: Torsion test apparatus.
1. AIM OF THE LABORATORY EXPERIMENT
To carry out a torsion test to destruction in order to determine for a mild steel and brass specimen:
1. The modulus of rigidity,
2. The shear stress at the limit of proportionality,
3. The general characteristics of the torque, angle of twist relationship.
2. THEORETICAL BACKGROUND
For a shaft under torsion, the relationship between the parameters is given by:
Where: T = applied torque
J = Polar second moment of area
= shear stress
G = Modulus of rigidity
= angle of twist (radians)
l = shaft length
For the…