Bending test
This test method enables the strength and dimensional change properties of plastics to be determined when subjected to three-point loading.
Three-point loading produces tensile, compressive and shear stresses in the test specimen. The elasticity modulus (E modulus) serves as a parameter for comparing different materials and is a measure of stiffness. The test is possible within a temperature range from –40°C to +230°C.
Results of the test method
Values for stress and strain such as:
- Tensile modulus εf [MPa]
- Flexural stress on conventional deflection (at 3.5% outer fibre strain) σfc [MPa] (3.5% flexural stress)
- Flexural strength σfM [%]
- Flexural strain at εfM [MPa]
- Flexural stress at break σfB [%]
- Flexural strain at break εfB [%]
- Stress-strain curve
