Reliability Analysis of Long-Rod Penetration Using the Walker-Anderson Penetration Model

Abstract

This paper addresses reliability assessment of the long-rod penetration for semi-infinite target to quantify the effect of uncertainties such as impact velocity, shape design, and material properties of projectile and target. For this purpose, the inverse reliability analysis is performed to calculate most probable point (MPP) for limit state function of the normalized penetration depth based on the performance measure approach (PMA) with the hybrid mean value (HMV) method, and the Walker-Anderson penetration model is used to consider stochastically the cavity expansion resistance of the target material as well as material of projectile and impact conditions. Sensitivity analysis is performed to evaluate the importance of the design parameters on the penetration reliability.