Part C: Torque application and recording of results To obtain sufficient data within the elastic range, different degree of torque was applied onto the two specimens increasingly based on the values stated in Table 1.
First and third equation can be combined to an equation through which we can find the modulus of rigidity of any material under observation. Within the proportional limit, the stress is directly proportional to strain i. In practice, torsion is often accompanied by bending or axial thrust due to any line shafting driving gears or pulleys, or propeller shaft.
This hence indicates that the member is being compressed; torsion puts member into compression state. When a member is undergoing torsion, all planes that are either parallel or perpendicular to the axis will be having a maximum shear stress.
As said earlier that stresses produce by the torque will be zero at central axis and maximum at the outer surface. This means that the stresses are being spread throughout the twisted member and hence, exhibiting ductility.
You are on page 1of 28 Search inside document Module: CV Laboratory 2A-9 ST Torsion Abstract In mechanics, torsion is defined as the twisting of an object due to the applied torque or moment which will produce rotation along the longitudinal axis of an object.