Abstract A comprehensive understanding of strain history in resin matrix composite, which is caused by variability of thermo-mechanical properties of the resin during composite processing, is essential to allow better design and control of properties of the resin matrix composite. In this paper, to know strain history of fast curing epoxy matrix composite and differences of strain history between fast and conventional curing epoxy matrix composites well, temperature and strain history at different locations in ten-ply unidirectional carbon-fiber fabrics reinforced the fast and conventional curing epoxy matrix composite laminates manufactured by wet lay-up method were measured by fiber Bragg grating (FBG) sensors. Results shown that the peak temperature due to curing exothermal reaction was 133.7 °C in both the 1st ply and the 5th ply in the fast curing composite when cure temperature profile settled at 80 °C, which was 27.4 °C higher than that in the conventional curing composite. Cure residual strain in the 1st ply and the 5th ply in the fast curing composite were −5183.3 μe and −4074.7 μe, respectively; while they were −2975.9 μe and −2660.8 μe in the conventional curing composite. The related properties of rheology and cure kinetics of the epoxy resin were thus given in advance.

中文翻译：

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通过 FBG 研究快速和常规固化环氧树脂基复合材料的应变历史

摘要 全面了解树脂基复合材料的应变历史，这是由复合材料加工过程中树脂热机械性能变化引起的，对于更好地设计和控制树脂基复合材料的性能至关重要。本文为了更好地了解快速固化环氧基复合材料的应变历史以及快速固化与常规固化环氧基复合材料的应变历史差异，在十层单向碳纤维织物中不同位置的温度和应变历史增强了快速固化和常规固化环氧树脂基复合材料的应变历史。通过光纤布拉格光栅 (FBG) 传感器测量通过湿法铺设方法制造的固化环氧树脂基复合材料层压板。结果表明，由于固化放热反应的峰值温度为 133。当固化温度曲线稳定在 80°C 时，快速固化复合材料的第一层和第五层的温度均为 7 °C，比传统固化复合材料的温度曲线高 27.4 °C。快速固化复合材料中第一层和第五层的固化残余应变分别为-5183.3 μe和-4074.7 μe；而在传统固化复合材料中，它们分别为 -2975.9 μe 和 -2660.8 μe。从而预先给出了环氧树脂的流变学和固化动力学的相关性能。