Abstract This paper investigates the effects of degassing, curing and post-curing conditions on the tensile quasi-static and fatigue behavior of a cold-curing structural epoxy adhesive. Quasi-static experiments performed at standardized and high displacement rates similar to those imposed to the material under fatigue loading, in order to derive comparable results from both loadings, and tensile-tensile fatigue tests at a fixed stress ratio, were carried out. Digital image correlation, video extensometer, thermal camera, digital camera and microscope were used to record the evolution of the strain and temperature, and assess the damage evolution during and after loading. The results shown that degassing can improve the material behavior when curing at ambient temperatures, since it assists the removal of several small voids from the bulk adhesive. However, when curing the material at high temperatures, immediately after mixing, the degassing does not offer any advantage, and the material’s long-term performance decreases.

中文翻译：

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制备和固化条件对结构粘合剂疲劳行为的影响

摘要 本文研究了脱气、固化和后固化条件对冷固化结构环氧胶粘剂的拉伸准静态和疲劳行为的影响。准静态实验在标准化和高位移率下进行，类似于在疲劳载荷下施加到材料上的位移率，以便从两种载荷中得出可比较的结果，并在固定应力比下进行拉伸拉伸疲劳试验。使用数字图像相关、视频引伸计、热像仪、数码相机和显微镜记录应变和温度的演变，并评估加载过程中和加载后的损伤演变。结果表明，脱气可以改善在环境温度下固化时的材料行为，因为它有助于从本体粘合剂中去除几个小空隙。