Instrumental Analysis

Measurement Procedure

• non-destructive test method
• measurement of the resonance frequency and its decay behaviour after a short mechanical impulse
• determination of elasticity and shear modulus, the lateral contraction number and damping

Damping and Modulus of Elasticity

• cuboid: length ≠ width ≠ height
• 40mm ≤ length ≤ 200 mm
• length ≥ 2 × width
• side surfaces right-angled and flat (for compact material: milled or ground)

Shear Modulus and Transverse Contraction Number

• same as for damping and modulus of elasticity, but additionally:
• 60 mm ≤ length ≤ 200 mm
• 30 mm ≤ width ≤ 100 mm
• height ≤ 0,5 × width

The best results are obtained for samples whose dimensions are in the middle of the tolerance range, e.g. 100×50×7 mm³. Other geometries are possible under certain circumstances (individual case examination).