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Products | Theory of Machines and Properties of Materials | Strength of Materials | WP 130

WP 130

Combined Bending and Torsion Apparatus

Technical Description

This test unit enables various equivalent stress hypotheses from materials science to be checked experimentally. Specimens made of different metals can be placed in a state of stress in several axes. A circular shaped load plate is used as a lever for the load moment, loading is applied by attaching weights to the circumference of the plate. The specimen is clamped in the centre of the plate using clamping levers. Via the defined points for the application of force, combined bending and torsion loading is generated. The angular position of the load weight can be moved in 15° steps. The deformation is measured diametrically opposite the points where the force is applied, that is at the point of maximum deflection. In this way the measurement error due to the deformation under load of the test apparatus is minimised. Compensation for the dead weight of the plate and compensation for the load weight ensure specimen loading is free of transverse forces.

Learning Objectives / Experiments

· Multiple loading of metal specimens using combined torsion and bending
- Determination of the yield point
- Checking the direct stress hypothesis
- Checking the shear stress hypothesis

Features

· Loading of the probes with pure bending or pure torsion, or a combination of both
· Transverse force-free specimen loading through suitable methods of compensation
· Simple, clear layout
· Uses plain, low cost specimens

Available accessories

WP 130.01 -- Set of 4 Specimens Alum., Copper, Steel Brass, 1 each
WP 130.21 -- Set of 4 Specimens Aluminum
WP 130.22 -- Set of 4 Specimens Copper
WP 130.23 -- Set of 4 Specimens Steel
WP 130.24 -- Set of 4 Specimens Brass

Specification

[1] Table unit for checking equivalent strain hypotheses from materials science
[2] Multiple axis specimen loading in bending or torsion, or a combination of both
[3] Compensation for the effect of dead weight
[4] Specimen length 49mm, free clamping length 11.5mm
[5] Specimen diameter Ø4mm
[6] Load moment 0...3.8Nm, graduations 0.1Nm
[7] Set of load weights up to 38N
[8] Deformation range 0...10mm, resolution 0.01mm
[9] Specimens made of steel, copper, brass and aluminium
[10] l x w x h 390x330x360mm

Technical Data

Specimen length: 49mm
Free clamping length: 11.5mm
Specimen diameter at the measured cross-section: Ø4mm
Load moment: 0...3.8Nm, graduations 0.1Nm
Load weight set: up to 38N
Deformation range: 0...10mm, resolution 0.01mm
Specimen materials:
Steel, cooper, brass, aluminium

Dimensions and Weight

l x w x h : 390 x 330 x 360 mm
Weight : approx. 17 kg

Scope of Delivery

1 bending and torsion apparatus, complete,
1 instruction manual

Order Details

020.13000 WP 130 Combined Bending and Torsion Apparatus