Abstract This paper focuses on high temperature fatigue of Carbon/polyimide 8-harness satin woven composite materials. Traction-traction (R = 0.1) fatigue tests at 250 °C are carried out on Carbon/polyimide [45]6 8-harness satin woven composites under three different environments (air, 2 bar N2, 2 bar O2). Part II is specifically devoted to the study of the environmental effects occurring during high temperature fatigue: strain, mechanical properties and damage evolution are characterized by Digital Image Correlation (DIC) and µ-Computed Tomography (µCT) techniques. The rich characterisation of damage extent and orientation can be naturally integrated within the context of a damage-dependent behaviour models. The effect of the environment is assessed through a description of thermo-oxidation phenomena occurring at high temperatures.

中文翻译：

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碳/聚酰亚胺 8 线束缎纹编织复合材料的高温疲劳。第二部分：环境影响

摘要 本文重点研究了碳/聚酰亚胺八线束缎纹编织复合材料的高温疲劳特性。在三种不同环境（空气、2 bar N2、2 bar O2）下对碳/聚酰亚胺 [45]6 8 线束缎纹编织复合材料进行了 250 °C 的牵引-牵引 (R = 0.1) 疲劳测试。第二部分专门研究高温疲劳期间发生的环境影响：应变、机械性能和损伤演变的特征在于数字图像相关 (DIC) 和 µ-计算机断层扫描 (µCT) 技术。损坏程度和方向的丰富表征可以自然地集成到依赖于损坏的行为模型的上下文中。通过描述高温下发生的热氧化现象来评估环境的影响。