Constitutive relation and failure criterion for three structural steels at high strain rates

摘要

The effects of strain rate, temperature and stress triaxiality on strength and ductility are studied for the three structural steels Weldox 460 E, Weldox 700 E and Weldox 900 E. The material properties are obtained from three types of tensile tests: quasi-static tests with smooth and notched specimens, quasi-static tests at elevated temperatures and dynamic tests over a wide range of strain rates. The test data are used to determine material constants for constitutive relations and fracture criteria for the three steels.