Salt spray aging effects on dynamic responses and failure characteristics of hybrid bonded-riveted CFRP/Al joints under high speed loading
Salt spray aging effects on dynamic responses and failure characteristics of hybrid bonded-riveted CFRP/Al joints under high speed loading
复制标题
高速加载下盐雾老化对CFRP/Al混合铆接动态响应和失效特性的影响
DOI：
10.1016/j.jmapro.2021.10.048
复制
发表时间：
2021-11-11
影响因子：
6.2
通讯作者：
Yang, Xujing
中科院分区：
文献类型：
--
作者：
Li, Maojun;Su, Ting;Yang, Xujing
碳纤维增强塑料（CFRP）复合材料在与金属材料连接以制造具有上级性能的结构方面具有巨大的潜力。由于复合材料/金属结构在长期服役过程中会受到腐蚀和冲击载荷的影响，本文综合研究了高速加载和盐雾-干湿循环暴露对CFRP/Al混杂胶铆接头动力响应的影响。试验结果表明，随着加载速度的增加，节点的承载能力相对提高。接头的峰值荷载、破坏位移和能量吸收对盐雾暴露敏感，并随着老化时间的延长而逐渐下降。利用高速摄像机记录了混合节点在动载荷作用下的破坏全过程，为进一步的渐进破坏分析提供了依据。选取具有代表性的试件对其失效特征进行了对比研究，发现高速加载（5-10 m/s）下试件的失效过程因时效时间和加载速度的不同而有较大差异。
Carbon fiber reinforced plastic (CFRP) composites exhibit great potential in connecting with metallic materials to fabricate desired structures with superior properties. Since composite/metal structures are expected to experience corrosion and impact loading during their long-term service, this paper comprehensively studied the effects of high speed loading and cyclic salt spray-dry-wet exposure on dynamic responses of hybrid bonded-riveted CFRP/Al joints. Experimental results indicated that the joint load-carrying capability was relatively higher with increased loading speed. The peak load, fail displacement and energy absorption of joints were sensitive to salt spray exposure and progressively declined with higher aging time. A high speed camera was implemented to record the whole failure process of hybrid joints under dynamic loading for further progressive failure analyses. The representative specimens were selected to comparatively investigate their failure characteristics and found that the failure process of samples under high speed loading (5-10 m/s) was considerably different with respect to aging time and loading speed.