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Effect of Hygrothermal Cycle Aging on the Mechanical Behavior of Single-lap Adhesive Bonded Joints

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Abstract

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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Authors and Affiliations

  1. School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450000, China

    Yisa Fan  (范以撒)

  2. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130022, China

    Jingxin Na  (那景新), Wenlong Mu, Guofeng Qin & Wei Tan

Authors
  1. Yisa Fan  (范以撒)
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  2. Jingxin Na  (那景新)
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  3. Wenlong Mu
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  4. Guofeng Qin
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  5. Wei Tan
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Corresponding author

Correspondence to Jingxin Na  (那景新).

Additional information

Funded by the National Natural Science Foundation of China(51775230) and the Graduate Innovation Fund of Jilin University(2017013)

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Fan, Y., Na, J., Mu, W. et al. Effect of Hygrothermal Cycle Aging on the Mechanical Behavior of Single-lap Adhesive Bonded Joints. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 34, 337–344 (2019). https://doi.org/10.1007/s11595-019-2057-3

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  • DOI: https://doi.org/10.1007/s11595-019-2057-3

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