Effect of strain-rate and moisture content on the mechanical properties of adhesively bonded joints

• Published in: Journal of mechanical science and technology Vol. 34; no. 5; pp. 1837 - 1845
• Main Authors: Johar, M., Wong, K. J., Rashidi, S. A., Tamin, M. N.
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 01-05-2020; Springer Nature B.V; 대한기계학회
• Subjects: Adhesion tests; Adhesive bonding; Adhesive joints; Bonded joints; Control; Correlation analysis; Dynamical Systems; Engineering; Flexing; Industrial and Production Engineering; Mechanical Engineering; Mechanical properties; Moisture absorption; Moisture content; Original Article; Strain rate; Vibration; 기계공학; Adhesive joints; Absorbed moisture; Mixed-mode flexure; Strain rate-dependent properties; Finite element simulation
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-020-0404-0

Mechanical performance of polymer-based adhesive joints is susceptible to moisture absorption. In this respect, this study establishes a validated methodology for predicting the mechanical responses of adhesively bonded joints under strain rate-dependent and moisture conditions. For this purpose, adhesively bonded lap-joint specimens were tested under the opening (Mode I) and in-plane shear (Mode II) loadings at machine crosshead displacement rates up to 500 mm/min. The mechanics response of the adhesively bonded joint is predicted using the extended cohesive zone model to capture the strain rate- and absorbed moisture-dependent effects. Good correlation of the predicted and measured flexural responses are demonstrated for the independent case of the mixed-mode flexure (MMF) test configuration. The corresponding failure processes of the adhesively bonded joint are described in terms of the characteristic interface damage and stress evolution.