Dynamic Yield Strength of Mild Steel under Impact Loading

Abstract

Dynamic yield strength of mild steel is estimated when impacted by the steel balls launched by two stage-light gas gun in the velocity region 1900-5200 m/s. The ball impact provides a radial momentum to the target material resulting in a crater which spreads out until it is stopped by the target yield strength. The dynamic yield strength of target metal is calculated by incorporating the densities of ball and target material along with experimentally measured crater radius and impact velocity in modified Bernoullis equation. The dynamic yield strength of mild steel has been found to be around 2000 MPa under high velocity impact, causing the material to deform at strain rates > 10 6 s -1 . Impact phenomenon was also simulated on Autodyn 2-D using Euler processor. Simulation results reveal that the target material is subjected to the highest strain rate of 10 5 -10 6 s -1 at the impact point and then decreases as the penetration progresses through the target. Predicted results of crater radius depth, and splash of material match with the experimental measurements.

Spatial Distribution of Mass and Speed on Movement of Two Shrapnel Discs of Variable Thickness in Explosive Load

“…Singh 2 , et al has provided an estimate of the dynamic yield curve of soft steel is given under the conditions of the impact of the impact of steel bullets, and the process is simulated in a medium Autodyn 2-D using a processor Euler. Deb 3 , et al describes the simulation of impact of jacketed projectiles on steel armour plates using explicit finite element analysis as implemented in LS-DYNA.…”

Tensile and compressive behaviour of S355 mild steel in a wide range of strain rates

“…During the last decades, the influence of loading rates now was the subject of several experimental studies on the mechanical behaviour of different grades of mild steels [1][2][3][4]. In particular, in the aerospace and automotive fields, the high strain-rate mechanical properties are of fundamental importance in order to improve the crashworthiness and safety against impacts.…”