通过四点弯曲试验和落锤冲击试验,研究了复合材料层合曲梁冲击前后四点弯曲强度及其破坏模式.不仅通过超声C扫描分析了不同内径复合材料层合曲梁试件冲击后的损伤特征,而且分析了冲击损伤对层合曲梁强度及层间最大应力的影响;同时,通过数字散斑相关方法得到复合材料层合曲梁在四点弯曲载荷作用下的变形场以及失效模式.研究结果将为复合材料层合曲梁在飞行器结构中的应用提供有价值的实验依据.
In this paper,the curved beam strength and strength-after-impact characteristics of carbon/epoxy laminated curved beams were studied experimentally using four-point bending test and low velocity impact.First,the post impact damage characterizations of the laminated curved beams with different radii were analyzed based on ultrasonic C-scan images.Second,the effect of impact damage on both the failure strength and the maximum interlaminar radial stresses of the laminated curved beams were investigated.Finally,the full field displacement distributions of the laminated curved beams were obtained using Digital Speckle Correlation Method (DSCM).Experimental results play a significant role for strength evaluating of laminated curved beams with and without impact damage.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%