长径比和分段间隔对理想分段杆侵彻钢靶的影响

Effects of segment length and gap spacing on segmented rods penetrating into steel target

利用显式动力分析软件ANSYS/LS-DYNA,采用Lagrange方法和Johnson-Cook本构模型,对分段间隔相同而分段体长径比不同的理想分段杆和分段体长径比相同而分段间隔不同的理想分段杆侵彻半无限厚钢靶进行了三维数值模拟。计算结果表明:分段体长径比和分段间隔对侵彻深度的影响均不是单调的增加或减小,而是存在一个最优值范围。

Numerical simulations were conducted on the penetration of different ideal segmented rods into steel targets by ANSYS/LS-DYNA3D.The Lagrangian method and Johnson-Cook constitutive model were coupled in the simulations.The effects of segment length and gap spacing on the depth of penetration were especially analyzed.The comparative analysis indicates that the length-diameter ratio and gap spacing of segments do not affect the depth of penetration monotonically increasing or decreasing,instead there exists an optimal parameter region.