高过载条件下CFRP壳体演化行为的数值模拟

Numerical Simulation for Evolutive Process of CFRP Shell under Condition of High Overload

针对未来弹箭武器关键新材料部件所面临的高过载服役环境,通过LS–DYNA动力学分析软件建立了霍普金森压杆(SHPB)和碳纤维增强树脂基复合材料(CFRP)壳体的仿真模型,对CFRP壳体抗高速压缩性能进行了动态数值仿真。通过渐进损伤与最大应变控制的破坏准则,描述了复合材料壳体在高速压缩下的损伤失效行为,比较分析发现,模拟结果和试验结果具有较好的一致性。计算得出CFRP壳体的最大承载应力为634 MPa,试验所测得的最大应力为602 MPa(误差为5.4%),仿真得出的壳体损伤状态与试验结果相吻合,以加强环根部剪切破坏为主。

Aiming at the high-overloading service conditions of the key new-material components in the future projectile weapons,the simulation models of split hopkinson pressure bar （SHPB） and carbon fiber reinforced resin matrix composites （CFRP） shell were established by the dynamic analysis software LS–DYNA. Then the dynamic numerical simulation on anti high-speed com-pression of shell with resin-based carbon fiber reinforced composite materials was carried out. The failure behavior of the composite shell under high speed compression was described through the failure criterion which was controlled by the progressive damage and the maximum strain. The numerical simulation results and the experiment results have better consistency by mean of comparison and analysis. The calculated maximum stress of CFRP shell is 634 MPa, the measured values is 602 MPa （error is 5.4%）, the shear fail-ure near the roots of the reinforcing rings is the mainly failure mode,and the damage status of simulation agree well with the experi-mental results.