药型罩材料本构模型对EFP数值模拟结果影响较大,为完成某球缺罩EFP的设计,分别选择J-C本构和Steinberg本构为紫铜药型罩材料模型,基于Autodyn开展110mm口径球缺药型罩EFP成型与侵彻对比计算。结果表明,使用J-C本构与Steinberg本构,EFP在成型过程中总体变形一致,但后者对应的弹丸尾部有较大部分与主体断裂,材料出现超过3.0E+7的应变,不符合物理事实;侵彻钢靶模拟,2种方法最大侵彻深度相差较小。综合而言,建议球缺药型罩EFP成型及侵彻模拟计算中应优先选取J-C本构模型。

The constitutive model of shaped charge liner material had a great influence on EFP numerical simulation. In order to complete the design of a truncated spherical EFP, J-C and Steinberg constitutive model were adopted as red copper shaped charge liner material models, then the forming and penetration comparison calculation of truncated spherical shaped charge liner EFP with 110 mm caliber were developed based on Autodyn. The results showed that the overall deformation of J-C and Steinberg constitutive model were consistent during the EFP forming process, but the projectile tail corresponding to the latter had large fracture from main body and the material appeared strain over 3. OE +7, which didn't conform to physical facts. In penetrate steel targe simulation, the difference of maximum penetration depth between two methods was small. In conclusion, J-C constitutive model was suggested in simulation of truncated spherical EFP forming and penetration.