关键词: 工程力学, 高速侵彻, 混凝土, 石灰石骨料, 石英石骨料, 质量损失

Abstract: A sets of high-velocity projectile penetration experiments with limestone and quartz aggregate concrete targets were conducted, in which the projectiles were used with different structures, different materials. The technologies of high-velocity ballistic gun, projectile flight attitude observing, remaining projectile recovery were used. The results showed that an approximate linear relationship exists between the mass loss of projectile and its initial momentum, which has a relation with the projectile’s material strength. The erosion of the projectile nose become severer and the mass loss of the projectile is higher as the striking velocity increases and the strength of the projectile material becomes lower. The structure of the projectile occurs broken and the penetration depth decreases with the erosion of the projectile nose. Compared with the projectiles which penetration depth does not become lower, there is a serious projectile distortion and the length of the projectile gets shorter. The character of “deforming/eroding” is shown clearly. Compared with penetrating into limestone concrete, the projectile which penetrated into quartz aggregate concrete has severe erosion, and the variation of the nose contour is more obvious. At last, it is represented that the erosion of the projectile nose is caused by the cutting of the concrete aggregate.

Key words: engineering mechanics, high-speed penetration, concrete, limestone aggregate, quartz aggregate, mass lose