温度对编织复合材料层合厚板冲击性能的影响研究

目的 研究室温和低温下编织复合材料层合厚板的冲击性能。方法 通过开展低速冲击试验和冲击后的压缩试验,对冲击响应曲线、冲击损伤容貌、压缩失效模式和剩余压缩强度进行分析,探讨冲击时的环境温度对编织复合材料层合厚板冲击性能的影响。结果 冲击后的编织复合材料层合厚板存在凹坑、分层、基体裂纹和纤维断裂等多种失效模式,压缩失效模式主要表现为横贯冲击损伤区域截断式破坏失效。结论 低温环境增强基体强度,降低了复合材料的冲击损伤程度,从而提高编织复合材料结构的剩余压缩强度。

Effect of Temperature on Impact Resistance of Woven Composite Thick Laminates

The work aims to study the impact resistance of woven composite thick laminates at room and low temperature. By carrying out the low-velocity impact test and post-impact compression test, the impact response curves, impact damage appearance, compression failure mode and residual compressive strength were analyzed and the effect of ambient temperature on the impact resistance of woven composite thick laminates was explored. The woven composite thick laminates after impact had many impact failure modes, such as pitting, delamination, matrix crack and fiber fracture, and the compression failure mode was truncation failure crossing through the impact damage area. The low temperature environment enhances the strength of the matrix, reduces the impact damage degree of composite material, and thus increases the residual compressive strength of the woven composite structure. The results of this study can provide references for the application in ice zone of the woven carbon fiber reinforced thick composite laminates.