An experimental study on fatigue characteristics of CFRP-steel hybrid laminates
An experimental study on fatigue characteristics of CFRP-steel hybrid laminates
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CFRP-钢混合层合板疲劳特性试验研究
DOI：
10.1016/j.matdes.2015.09.024
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发表时间：
2015-12-25
影响因子：
8.4
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Ma, Jingbo;Li, Qing
本文旨在研究波浪碳纤维增强聚合物（CFRP）薄板与不锈钢薄板复合层合板在张拉载荷作用下的疲劳特性。考虑了不同的加载选项（例如相同的应力和相同的力），CFRP片材的层数以及层压板的层数（单面和双面）。通过一系列的试验研究，确定了复合材料复合材料在延长复合材料疲劳裂纹萌生寿命、防止疲劳裂纹扩展和延长复合材料疲劳寿命方面的有效性。试验中观察到三种不同的破坏模式，分别为分层、分层弯曲和纤维断裂。结果表明，载荷条件和碳纤维布厚度是影响其破坏模式和抗疲劳性能的关键参数。在相同受力条件下，金属纤维层合板的裂纹起裂寿命和疲劳寿命分别比单片钢板提高1.06 ~ 1.96倍和1.17 ~ 2.07倍；而在相同的胁迫条件下，其降低系数分别为0.63 ~ 0.89和0.28 ~ 0.61。在相同厚度的CFRP材料中，双面结合的FMLs比单面结合的FMLs具有更好的疲劳性能和更稳定的裂纹扩展。(C) 2015 Elsevier Ltd.版权所有。
This paper aims to investigate the fatigue characteristics of hybrid laminates consisting of wave carbon fiber reinforced polymer (CFRP) sheets and a thin stainless steel plate under the tension-tension loading. Different loading options (e.g. same stress and same force), layers of CFRP sheets, and lay-ups of laminates (single and double sides) were considered. A series of experimental tests were performed to determine the effectiveness of the CFRP bonding on prolonging fatigue crack initiation life, preventing fatigue crack propagation and extending fatigue life of the hybrid laminates. Three distinct failure modes, classified as delamination, delamination bending and fiber breakage, were observed in the tests. It is shown that the loading conditions and CFRP thickness are the critical parameters affecting the failure modes and fatigue resistance. The crack initiation life and fatigue life of fiber-metal laminates (FMLs) increase by factors ranging from 1.06 to 1.96 and 1.17 to 2.07, respectively, relative to monolithic steel plates under the same force condition; whereas decrease by factors ranging from 0.63 to 0.89 and 0.28 to 0.61 under the same stress condition. Moreover, the double-side bonded FMLs show better fatigue properties and more stable crack propagation than single-side counterpart with the same thickness of CFRP. (C) 2015 Elsevier Ltd. All rights reserved.