Residual strength prediction of adhesive CFRP-aluminum alloy adhesively bonded joint based on FTIR analysis

被引：0

作者：

Mu W.-L. ^{[1
,2
]}

Na J.-X. ^{[1
]}

Tan W. ^{[1
]}

Wang G.-B. ^{[1
]}

Shen H. ^{[1
]}

Luan J.-Z. ^{[1
]}

机构：

[1] State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun

[2] College of Mechnical and Electrical Engineering, Henan Agricultural University, Zhengzhou

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2021年 / 51卷 / 01期

关键词：

Adhesively bonded joint; Carbon fiber reinforced polymer composites(CFRP); Fourier transform infrared spectroscopy analysis; Hygrothermal aging; Residual strength prediction;

D O I：

10.13229/j.cnki.jdxbgxb20191063

中图分类号：

学科分类号：

摘要：

The aging behavior and mechanism of adhesively bonded joints of CFRP- aluminum alloy exposured to hygrothermal environment were studied in this paper. First, the joints were aged at 80℃ with 95% relative humidity (RH) for different durations and then the quasi-static tensile and shear tests were performed. Second, the residual strength and failure mode of the joint were analyzed. Third, combined with the Fourier transform infrared spectroscopy (FTIR) results of adhesive, the aging mechanism of adhesive joints was revealed. The results indicate that the strength of joint decreases significantly due to hygrothermal aging, which approximates the exponential function. The failure modes of unaged and aged joints all presented cohesive failure primarily. However, with the increase in aging duration the adhesive-substrate interface was damaged, and the surfaces of aged joints became relatively rough due to the plasticizing of the adhesive. The hydrolysis reaction occurred in the adhesive due to hygrothermal aging, resulting in chain scission. The post curing of adhesive was also observed at the initial stage of aging. Adhesive degradation is the primary cause of the decrease in the strength of the joint. Finally a residual strength prediction method was established, which can be used to predict residual strength of hygrothermally aged joints by testing the chemical characteristics of adhesive. © 2021, Jilin University Press. All right reserved.

引用

页码：139 / 146

页数：7

共 16 条

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