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Short-beam shear fatigue life assessment of thermally cycled carbon–aluminium laminates with protective glass interlayers
Archives of Civil and Mechanical Engineering ( IF 4.4 ) Pub Date : 2021-03-11 , DOI: 10.1007/s43452-021-00181-y
Barbara Surowska , Konrad Dadej , Patryk Jakubczak , Jarosław Bieniaś

Fibre metal laminates (FMLs) are attractive construction materials, especially for use in aerospace and transport facilities. Throughout their service life, thin-walled structures made of FMLs are exposed to static and dynamic loads, as well as corrosion and the unfavourable influence of environmental conditions. The paper presents an experimental analysis of the combined mechanical and environmental long-term behaviour of carbon-based fibre metal laminates and their variants with protective glass layers. The Al alloy/CFRP and Al alloy/GFRP/CFRP laminates in a 3/2 configuration were used. The tested laminates were subjected to 1500 thermal cycles with a temperature range of 130 °C. The static and fatigue interlaminar shear strengths were tested before and after thermal conditioning. It was shown that the stable stiffness reduction in the tested laminates was observed with increasing fatigue cycles, due to the progressive fatigue damage accumulation. The thermally cycled laminates feature slightly smoother stiffness loss, while a more rapid decrease was observed in thermally untreated laminates. Moreover, the fatigue life of the tested laminates subjected to thermal cycling revealed nine times fewer fatigue cycles of laminates with glass protectors after thermal cycles in comparison to the laminates not subjected to thermal cycling.



中文翻译:

带有保护玻璃夹层的热循环碳铝层压板的短梁剪切疲劳寿命评估

纤维金属层压板(FML)是有吸引力的建筑材料,特别是用于航空航天和运输设施。在整个使用寿命期间,由FML制成的薄壁结构会承受静态和动态载荷,以及腐蚀和环境条件的不利影响。本文介绍了对碳基纤维金属层压板及其带有保护性玻璃层的变体的综合机械和环境长期性能的实验分析。使用3/2构型的铝合金/ CFRP和铝合金/ GFRP / CFRP层压板。所测试的层压板在130°C的温度范围内经受1500次热循环。在热调节之前和之后测试静态和疲劳层间剪切强度。结果表明,由于疲劳损伤的累积,随着疲劳循环的增加,在测试的层压板中观察到了稳定的刚度降低。热循环层压板的特征是刚度损失略微平滑,而未经热处理的层压板则观察到更快的降低。此外,经受热循环的测试层压板的疲劳寿命显示,与未经历热循环的层压板相比,具有玻璃保护层的层压板在热循环之后的疲劳循环减少了九倍。

更新日期:2021-03-12
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