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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。
In this paper, we studied the damage and destruction of the orthogonally laminated ([0/90] s) carbon fiber reinforced epoxy composites under static and pull-pull fatigue, and discussed the failure mechanism. The mechanical properties and damage generation and propagation were tested by means of microscopic observation, acoustic emission and infrared thermography, and the damage and fracture, acoustic emission characterization and temperature change of the material microstructure under different loading conditions were obtained relationship. The sudden increase of acoustic emission can predict the fracture of the material, the size of the temperature rise can be used to determine the site and extent of material damage.