Effect of Hygrothermal Cycle Aging on the Mechanical Behavior of Single-lap Adhesive Bonded Joints
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第2期
论文作者：范以撒 那景新 MU Wenlong QIN Guofeng TAN Wei
文章页码：337 - 344
摘 要：The aging behavior of single lap joints（SLJ） in hygrothermal cycles was investigated and compared by using a shearing strength test, Fourier transform infrared spectroscopy（FTIR）, thermogravimetric analysis（TG/DTG）, energy dispersive spectrometry（EDS） and scanning electronic microscopy（SEM）. The temperature/relative humidity was set at 80 ℃/95% and –40 ℃/30% for 20 cycles, 40 cycles, and 60 cycles（one cycle was 12 hours）, respectively. The experimental results show that hygrothermal aging significantly decreases the failure strength of adhesive joints. However, the failure displacement increases as the number of aging cycles increases. In addition, hygrothermal aging changes the failure mode of the adhesive joints from a cohesive fracture in un-aged adhesive layers to an interfacial failure of aged adhesive joints.
范以撒1，那景新2，MU Wenlong2，QIN Guofeng2，TAN Wei2
1. School of Mechanical Engineering, North China University of Water Resources and Electric Power2. State Key Laboratory of Automotive Simulation and Control, Jilin University
摘 要：The aging behavior of single lap joints（SLJ） in hygrothermal cycles was investigated and compared by using a shearing strength test, Fourier transform infrared spectroscopy（FTIR）, thermogravimetric analysis（TG/DTG）, energy dispersive spectrometry（EDS） and scanning electronic microscopy（SEM）. The temperature/relative humidity was set at 80 ℃/95% and –40 ℃/30% for 20 cycles, 40 cycles, and 60 cycles（one cycle was 12 hours）, respectively. The experimental results show that hygrothermal aging significantly decreases the failure strength of adhesive joints. However, the failure displacement increases as the number of aging cycles increases. In addition, hygrothermal aging changes the failure mode of the adhesive joints from a cohesive fracture in un-aged adhesive layers to an interfacial failure of aged adhesive joints.
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