Torsion Testing

This advanced educational apparatus provides students with practical experience in analysing material behaviour under torsional stress, supporting the study of mechanical properties and failure mechanisms. Designed to bridge theoretical learning with hands-on experimentation, the system is an essential addition to engineering teaching laboratories.

The apparatus applies up to 30 Nm of torque to various material specimens using a precision hand-operated worm and wheel gearbox with a 60:1 ratio. This enables detailed exploration of torsional principles and material testing techniques. The system accommodates specimens up to 750 mm in length between the fixed moment head and the adjustable torsion head. The movable torsion head slides along the base to facilitate testing of specimens of different lengths.

Torque is transmitted through standard hexagonal drives, allowing clear observation of how materials respond to applied forces. Students can manually adjust the angular position of the specimen using the torsion head mechanism and reference dial gauge. This capability allows for pre-setting or compensating for twist, reinforcing key concepts such as angular displacement and material deformation under torsional load.

Integrated strain gauges within the torsion head enable direct measurement of material strain during testing.

When connected to the Matrix Data Acquisition box, the system captures real-time data including rotation and torque via user-friendly software for analysis of material strength,  torsional deformation, and failure characteristics. This comprehensive approach enhances student understanding of material response to torsional stress through both qualitative and quantitative investigation.

 Learning Objectives:

• Torsional loading to failure of varying material specimens​
• Torsional variation due to material, cross sectional area​
• Comparison between actual and theoretical results​
• Determination of the Modulus of Rigidity and Yield shear stress​
• Working with the elastic torsion equation