【摘 要】
：
To provide reference and guidance for the design of the adhesive structures of the CFRP-aluminum alloy in the actual service environments,the aging laws of the adhesive joints under the hot,humid envi
【机 构】
：
Jilin University,State Key Laboratory of Automotive Simulation and Control
论文部分内容阅读
To provide reference and guidance for the design of the adhesive structures of the CFRP-aluminum alloy in the actual service environments,the aging laws of the adhesive joints under the hot,humid environment and the load were studied in this paper,and a prediction method considering different aging conditions was proposed based on the cohesive zone model.The structural adhesive Araldite? 2015 was selected to fabricate the CFRP-aluminum alloy butt joint,and the aging tests were carried out under the condition of hygrothermal cycle,combined hygrothermal cycle and static load,combined hygrothermal cycle and alternating load.The residual strength and failure modes of the joint after aging were analyzed.The results showed that the strength of joints decreased markedly after 60 hours of hygrothermal cycle.The load further aggravates the aging of the joint,and the dynamic alternating load has more influence on the failure strength of the joint than the static load; At the same time,the joint failure mode has changed after aging,and compared to the selected CFRP,adhesive performance decreased more obviously; The damage factors under different aging conditions were defined,combined with the failure criterion obtained by the test,the classical double linear traction-displacement cohesion rule is modified,and the residual strength of the adhesive joint after aging is predicted by numerical simulation analysis.
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