锥头弹丸穿透薄钢板的实验研究

 为了研究延性薄靶的穿透性能，进行了90°锥头弹丸穿透薄钢板的准静态和动态实验。通过准静态实验，得到了4种不同厚度钢板的载荷-压入位移曲线及破坏模式；结合膜力理论模型及纯弯静塑性破坏模型，对实验结果进行了分析，得出：对于薄靶，大变形膜力起主导作用，随着靶厚增加，弯距在板整体变形过程中的影响逐渐增大。通过动态穿透实验，得到了弹丸穿透4种不同厚度钢板的入射速度、残余速度及靶板破坏模式，计算得到穿透耗能。最后，将准静态实验与动态实验结果进行了对比讨论。

An Experimental Study of Thin Steel Plates Perforated by Conical-Nosed Projectiles

Both quasi-static and impact loading experiments of thin steel plates are performed using conical-nosed projectiles with cone angle of 90°.Load-deflection curves and different failure modes are acquired from the quasi-static tests.Membrane analysis and plastic collapse model with pure bending are investigated and compared with the experimental data.It is shown that the membrane force dominates the deformation process for the large deformation of thin plate;with increase of the thickness of plate,the bending moment becomes more and more important.In the impact experiments,the initial and residual velocities with different failure modes are obtained for four plates with different thicknesses,and the critical perforation energies are evaluated.In addition,the experimental data of quasi-static and dynamic tests are compared and discussed.