EFFECT OF STRAIN RATE OF HIGH-STRENGTH SHEET STEELS ON THEIR STRAIN FRACTURE UNDER UNIAXIAL AND BIAXIAL LOADING

摘要

This paper describes an experimental study of the strain rate of DP780, DP980, and VN240 high-strength sheet steels on an increase in their plasticity under uniaxial and biaxial tension. The strain rates of the steels vary in the range from 10(-4) to 17 bold /bold10(3) s(-1).