复合材料加筋壁板低速冲击响应与冲击能量关系

Connection of Low-velocity Impact Response and Impact Energy of Stiffened Composite Panel

基于ABAQUS有限元软件,采用Hashin损伤准则建立了一种有效的复合材料加筋壁板低速冲击模型。分析了接触力、加筋壁板吸收能量和损伤散逸能对冲击响应的影响。结果表明:随着冲击能量的增大,接触力峰值前移,且冲击后板吸收能量与损伤散逸能的差值变大。落锤冲击实验表明,低速冲击能量下损伤程度与冲击能量正相关。对比了损伤区域的仿真结果和实验结果,发现二者拟合较好。

Based on the finite element software of ABAQUS,with Hashin damage criteria an effective low-velocity impact model of stiffened composite panel was established.The effects of contact pressure,internal energy and damage dissipation energy on the impact response were analyzed.The results show that the peak of contact pressure moves forward and the different value of internal energy and damage dissipation energy becomes bigger with the increasing of impact energy.Meanwhile,the impact test results indicate that the damage degree is direct proportion with impact energy in the lowvelocity impact process.Contrast of damage area between finite element analysis and test indicates that both of them fit better.