Description:
This benchtop unit allows a variety of experiments to be undertaken to investigate test specimens under torsional loading and bending loading within their elastic limits. An extruded base frame carries two solid vertical supports. Profiled grooves within the base frame, fasteners and quick release handles ensure quick and easy adjustment of the span between the vertical supports.
One vertical support carries a unique specimen chuck with a through hole. Another chuck is held stationary at one end of the base frame. The chucks have two functions; to secure the torsion specimens during testing and to transmit the torsional loading to the torsion specimen. The torsional load is transmitted using a pulley and cord arrangement, with the pulley being mounted to a shaft running in bearings.
The bearings minimise the friction in the system. The chuck installed into the vertical support has a through hole to allow the length of the torsion specimen to be varied.
Experimental Capabilities:
Deflection of specimen as a function of loading force, material, Young’s Modulus of Elasticity (E), cross section and support span
Comparison of bending stiffness of varying specimen sections for the same cross sectional area
Comparison of cantilever beams, simply supported beams
Determination of Young’s Modulus of Elasticity (E) in shear for the different material specimens
Introducing Poisson’s Ratio
Torsion angle and clamping length relationship
Torsion angle and torsion moment relationship
Torsion angle and specimen cross section
Modulus of rigidity introduction
Technical Specification:
- Torsion specimens: Ø5.00 ± 0.5mm x 470mm long, steel, aluminium, brass and nylon
- Bending specimens: 1200mm long, steel, aluminium and brass
- Bending specimens:
25.4mm (W) x 3.18mm (H)
25.4mm (W) x 4.76mm (H)
25.4mm (W) x 6.35mm (H)
19.05mm (W) x 3.18mm (H) - 2 x Load hangers
- 1 x Dial gauge: 25mm travel, 0.01mm resolution, with precision anvil
- 1 x Movable stand for dial gauge
- 1 x Tape measure
- 2 x Clamp plates for cantilevers
- 2 x Pointer and protractor
- Knife edge and ground dowels for simply supported beam
- Torsion shaft running in bearings
