Experimental and Numerical Investigation of Quasi-Static (10−3 s−1) Fracture Behavior of Armor Steel

Abstract

In this investigation, a numerical approach has been used for predicting the quasi-static strain rate (10−3 s−1) hardening and damage behavior for armor grade steel Armox 500T at ambient temperature. The power-law has been used to provide the hardening yield to ultimate tensile strength. Further, to predict the damage behavior, ductile damage model parameters, which include fracture strain and stress triaxiality, have been established. The damage has been created in the form of cup and cone that follows the necking behavior. The FEA model from the current study is capable of predicting the flow stress versus plastic strain curve for the strain rate ranging from 10−4 to 10−1 s−1. Results from FE simulation have been validated by experimental results at the strain rate of 10−3 s−1. The results revealed that the simulation values have good agreement with the experimental data. At the end, fractographic analysis of the tensile samples is also presented for better understanding of the damage behavior of armor steel.