平面编织复合材料薄板的高速小质量冲击性能  

Impact Resistance of Thin Plain Woven Composite Laminates under High-velocity Small Mass Impact

作　　者：胡雪垚 张晓琼[1] 郭伟国[1] 惠旭龙 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《材料科学与工程学报》2014年第1期40-46,84,共8页Journal of Materials Science and Engineering

摘　　要：为了研究平面编织复合材料薄板在高速小质量弹丸冲击作用下的响应及动态力学性能,本文基于ABAQUS软件平台建立了相应的有限元分析模型,该模型选用修正后的Hashin准则和最大应变准则进行单层板面内的损伤判断,利用Cohesive界面单元模拟层间分层损伤,并根据不同失效模式折减相应的材料参数。通过与试验对比发现:有限元模拟结果与试验结果吻合较好,说明该模型能较好地预测平面编织复合材料薄板的冲击响应及性能;高速小质量弹丸冲击是由弯曲波和剪切波控制的动态响应问题,接触力与挠度的变化是不同步的,且应力波在传播过程中不断衰减;复合材料薄板在冲击过程中有明显的失稳现象,因此变形区域的动能和应变能在吸能中占据了较大的比例;复合材料薄板冲击后的凹坑会在两小时内发生一定程度的回弹,之后则保持稳定。To understand the dynamic response and mechanical behavior of thin plain woven composite laminates under high impact velocity and low impact mass,a numerical simulation model was established based on ABAQUS software.Two criteria,that are modified Hashin criterion and maximum strain criterion,were chosen to predict the in-plain damage,and to simulate delaminations.In the process the cohesive elements were utilized between every two layers.In addition,the corresponding material constants can be reduced with different failure modes.Compared with experimental results,several conclusions can be drawn.First,the simulation results and experimental results show a perfect agreement,which indicates that the properties and impact response of thin plain woven composite laminates can be accurately predicted by this model.Moreover,the high-velocity small mass impact experiments can be considered as the dynamic response of materials controlled by flexural waves and shear waves.In this impact process,contact force is out of phase with deflection and the stress wave is steadily reduced during propagation.For thin composite laminates,the kinetic energy and strain energy of the deformed area hold the major part of the whole impact energy because of the instability.Finally,the dent recovery occurs within 2hours and then remains the same.

关 键 词：平面编织 修正后的Hashin准则 抗冲击性能 应力波 凹坑回弹 

分 类 号：TB33[一般工业技术—材料科学与工程]