Impact test on soap target with steel projectile

In order to study the damage of a biological organism impacted by incident objects, experiments have been carried out using soap to simulate an organism at hypervelocity impact range of Hypervelocity Aerodynamics Institute,CARDC.In the tests,the soap targets are im-pacted by 3.0mm steel sphere projectile at high velocity conditions of 0.96km/s and 1.88km/s, and hypervelocity conditions of 3.52km/s and 4.98km/s.The characteristics and damage pat-terns of the soap target under test conditions are obtained.It is found that,at high impact veloci-ty,the soap target is perforated by the steel projectile.A long pole perforation is formed at the impact velocity of 0.96km/s and an evase perforation shows up at the impact velocity of 1.88km/s. At hypervelocity impacts (3.52km/s and 4.98km/s),big hemisphere craters are produced.The damage of the target could be considered in two aspects.On the one hand,the sizable craters produced at hypervelocity impacts lead to direct volume remove.This would bring severe wound to an organism.On the other hand,as a result of the extensive shockwave load,the damage area is larger than the carter zone.Analysis shows that the extensive shockwave load will not only cause serious damage to an organism by direct volume remove,but also cause a damage to putres-cence of tissues,organs,and fractures near the ballistic trajectory of the projectile.