Abstract
We conducted three penetration experiments of a hardened 4340 steel projectile with a length-to-diameter ratio of 7 into concrete targets having an unconfined compressive strength of 43 MPa. The targets were each cast with six flatpack stress gages oriented to measure radial stress and positioned at various depths and radii from the penetration path. The experiments provide researchers with quality data that can be used to validate first-principle codes and to better understand the penetration mechanics in brittle, porous materials. Additional tests are recommended at other striking velocities and gage locations to further quantify stress within concrete targets.
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