Large Strain Mechanical Behavior of HSLA-100 Steel Over a Wide Range of Strain Rates

摘要: High-strength low alloy steels (HSLA) have been designed to replace high-yield (HY) strength in naval applications involving impact loading as the latter, which contain more carbon, require complicated welding processes. The critical role of HSLA-100 steel requires achieving an accurate understanding its behavior under dynamic loading. Accordingly, this paper, we experimentally investigate behavior, establish a model for constitutive response at high-strain rates, and discuss failure mode. large strain high-strain-rate mechanical high is characterized over wide range ranging from 10^(−3) s^(−1) 10^4 s^(−1). ability store energy cold work adiabatic conditions assessed through direct measurement fraction plastic converted into heat. susceptibility due formation development shear bands (ASB) investigated two perspectives, well-accepted criterion newly suggested [1]. Our experimental results show that has apparent rate sensitivity rates exceeding 3000 minimal deformation rate. In addition, both based criteria are effective describing propensity (adiabatic band). Finally, use determine constants Johnson-Cook HSLA-100. implementation commercial finite element code gives predictions capturing properly observed behavior. High-strain rate, thermomechanical processes, failure, elements, Kolsky bar,