正交复合材料层板在静态与拉—拉疲劳下的损伤破坏
DAMAGE OF CROSS-PLY CARBON/EPOXY LAMINATE SUBJECTED TO STATIC AND FATIGUE LOADS
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摘要: 本文研究了正交铺层([0/90]s)碳纤维增强环氧复合材料在静态与拉—拉疲劳下的损伤破坏,探讨了它的破坏机理。通过采用显微观测,声发射技术及红外热象分析等多种手段测试其力学性能、损伤的产生和扩展,得到了不同加载条件下材料微结构的损伤断裂与声发射表征量及温度变化的关系。声发射累积量的突然增大可预报材料的断裂,温升的大小可供判别材料损伤的部位和程度。Abstract: This paper is concerned with the damage of cross-ply carben fiber reinforcod epoxy composites under static and fatigue loading.Acoustic emission, microscopie observation,infrared thermography are employed to detect the formation and prepagation of the damage and to test the fatigue behaviour. The relationships of microstructure damage with acoustic emrssion characteristic parameter and temperatuer variation are studied.The damage mechaniesm of unnotched and notched specimens are compared.
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