Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 27, 2023 - September 29, 2023
Penetration evaluation is an important indicator for protecting buildings and structures from serious accidents, such as impacts from tornado-borne objects and aircraft collisions. Conventionally, the evaluation of penetration has been carried out using a penetration evaluation formula to calculate the penetration limit thickness. However, the conventional penetration evaluation formula does not consider important characteristics of penetration phenomena, such as the deformation and strain rate dependence of the penetrated material. Therefore, this study aims to improve the accuracy of the penetration evaluation formula and focuses on the formulation of steel plate penetration phenomena considering the strain rate dependence of the deformation and fracture characteristics of the penetrated material. In this report, experiments were conducted by colliding cylindrical steel projectiles, assuming tornado-borne objects, with SM400 material to examine the factors influencing the penetration limit thickness. From the experimental results, it was clarified that the tip shape of the projectile greatly affects the ballistic limit velocity of the steel plate.
