Determination of Young's Modulus and Tensile Strength of Viscoelastic Polymers at High Strain Rates

摘要

Polymers are applied more and more in safety relevant parts such as bumpers and air bag covers. It has to be affirmed that they function reliably at temperatures ranging from at least -35℃ to 85℃. In a crash the materials may deformed with very high strain rates going up to several 1000/s. As most of these parts are dimensioned using FEA programs reliable and realistic materials data are required. Polymers behave viscoelasticly at the applied temperatures and their properties depend on strain rate and temperature.