Evaluation of the Effects of Aging under Humidity and Temperature on the Moisture Absorption and Mechanical Degradation of Metal-Composite Adhesive Bonded Joints

Document Type : Solid Mechanics

Authors

1 Ph.D. Student, Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran

2 Corresponding author: Assistant Professor, Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran

Abstract

In many industries, such as marine industries, there is a need to connect composite and non-composite parts to each other to produce desirable structures. Since these joints are exposed to different environmental conditions, it is of particular importance to investigate the mechanical properties of these joints under thermal humidity conditions. In order to estimate the long-term performance of single-edge metal-composite adhesive joints under thermal humidity environmental conditions, the samples were placed in water at a constant temperature of 70 ° C for periods of 50, 75 and 90 days, and the moisture absorption rate in the joints was calculated. According to the observations made, after a period of 30 days and reaching saturation of moisture absorption, the highest moisture absorption rate in the adhesive joints was measured to be 1.97%. Subsequently, the metal-composite adhesive joints were subjected to static uniaxial tension to obtain their final strength. By comparing the ultimate strength of unaged adhesive joints with aged samples, it was concluded that after the samples were exposed to hot and humid environmental conditions, their strength decreased by 71 percent; also, by examining the fracture surfaces, it was determined that the fracture pattern changed from adhesive to cohesive.

Graphical Abstract

Evaluation of the Effects of Aging under Humidity and Temperature on the Moisture Absorption and Mechanical Degradation of Metal-Composite Adhesive Bonded Joints

Highlights

  • In metal-composite adhesive bonded joints, the load is uniformly distributed across the overlapped areas.
  • Moisture absorption in adhesive bonded joints reaches a saturation point after a certain period.
  • As the aging time increases, the strength of adhesive bonded joints decreases.

Keywords

Main Subjects


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References

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Aerospace Mechanics
Volume 20, Issue 4 - Serial Number 78
Serial No. 78, WinterQuarterly
March 2025
Pages 1-11

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History

  • Receive Date: 09 October 2024
  • Revise Date: 18 November 2024
  • Accept Date: 01 December 2024
  • Publish Date: 19 February 2025

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