Abstract
The anti-projectile performance of the confined concrete is better than that of the normal concrete. When the radius of the confining tube is relatively small, the confined concrete would be in comminuted stage during the penetrating process of projectiles. Based on the assumption that comminuted concrete materials obey Griffith strength theory, a finite cylindrical cavity expansion model for confined concrete targets is proposed. Numerical results show that the lateral confinement affects little on the cavity stress for relatively small confining rigidity, and the cavity stress increases significantly with the increase of the radius ratio of cavity to confining tube for relatively large lateral confining rigidity.
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