The Critical Energy Release Rate of Welded Joints Between Fiber-Reinforced Thermoplastics and Metals When Thermal Residual Stress is Considered
The Critical Energy Release Rate of Welded Joints Between Fiber-Reinforced Thermoplastics and Metals When Thermal Residual Stress is Considered
复制标题
考虑热残余应力时纤维增强热塑性塑料与金属焊接接头的临界能量释放率
DOI：
10.1080/00218464.2015.1031339
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Chiaki Sato
中科院分区：
文献类型：
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作者：
K. Shimamoto;Y. Sekiguchi;Chiaki Sato
对纤维增强热塑性塑料(FRTP)与金属焊接接头的热效应进行了理论和实验研究。由于FRTP使用热塑性塑料作为基质树脂，因此它们比纤维增强热固性塑料(FRP或FRSP)具有优势，包括可焊接的能力。然而，当不同材料焊接在一起时，由于材料的热膨胀不同而产生热应力，影响接头的能量释放速率。因此，在强度评估试验中，需要一种包括热应力影响在内的真实能量释放率的评估方法。虽然已经提出了几种补偿热应力和评估真实能量释放率的理论，但它们需要的参数很难测量。因此，在实验研究中应用它们是困难的。本文提出了一种参数易于测量的双悬臂梁焊接节点能量释放率的理论计算方法。根据FRTP和铝合金焊接DCB试件的试验结果，讨论了热应力对临界能量释放率的影响。
Thermal effects on welded joints between fiber-reinforced thermoplastics (FRTPs) and metals have been investigated theoretically and experimentally. Because FRTPs use thermoplastics as the matrix resin, they have advantages over fiber-reinforced thermoset plastics (FRPs or FRSPs), including the ability to be welded. When dissimilar materials are welded together, however, thermal stress occurs due to the different thermal expansions of the materials and affects the energy release rate of the joint. Therefore, a method for evaluating the true energy release rate, including the effect of thermal stress, is necessary for strength evaluation tests. Although several theories that compensate for the thermal stress and evaluate the true energy release rate have already been proposed, they require parameters that are difficult to measure. Therefore, it is difficult to apply them in experimental investigations. In this article, a theoretical method with easily measurable parameters is proposed to calculate the energy release rate of welded double cantilever beam (DCB) joints. The effect of the thermal stress on the critical energy release rate is discussed in terms of the experimental results of a welded DCB specimen composed of a FRTP and an aluminum alloy.