SACMA和QMW试验方法对复合材料层合板低速冲击后压缩行为的影响

采用了 SACMA标准和一种小试样试验方法对复合材料层合板低速冲击后的压缩 (CAI)行为进行试验研究 ,从层合板的冲击损伤分布、冲击后压缩破坏过程 ,以及层合板的准静态横向压缩、开孔后压缩等多方面进行对比 ,结果表明 ,这两种试验方法存在很大差别 ,试验方法不同 ,层合板低速冲击后的压缩行为也不同 ;采用 SACMA标准所测得的低速冲击后压缩强度更能全面反映基体韧性的优劣。作为 CAI试验标准 ,小试样试验方法还有待改进

Effect of SACMA and QMW Test Methods onCompressive Properties of Composite Laminatesafter Low Velocity Impact

Experimental studies on the compressive behavior of composite laminates after low velocity impact was carried out with two test methods. One is SACMA Standard, and the other is a small dimensional specimen test method. Impact damage distributions, compressive failure process after impact, quasi static indentation and compression of laminates with a hole were brought into comparison between these two test methods. The results showed that there is a great difference between these two test methods. Compressive behavior of laminates after impact varies with different test methods. Residual compressive strength of laminates after low velocity impact measured with SACMA Standard can reflect stiffness properties of composite resins more wholely than that measured with the other method can do. Small dimensional specimen test method should be improved on as an experimental standard of compressive strength after impact. {