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

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Abstract

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.

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Acknowledgments

This work is funded by the Aerospace Malaysia Innovation Center and Universiti Teknologi Malaysia under Project No. AMIC/AM/P02-01 (UTM Grant No. 4C089 and 01M01, respectively).

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Correspondence to M. N. Tamin.

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Mahzan Johar received his B.Sc. in Material Engineering and M.Sc. Manufacturing Engineering from Universiti Teknikal Malaysia Melaka (UTeM). He is currently a Ph.D. student of Mechanical Engineering at Universiti Teknologi Malaysia (UTM). His research interests are in progressive damage of structures and computational mechanics.

Mohd Nasir Tamin received his Ph.D. degree in Mechanical Engineering and Applied Mechanics from the University of Rhode Island, USA in 1997. He is currently a Research Professor at the School of Mechanical Engineering, Uni-versiti Teknologi Malaysia (UTM), Malaysia. He heads the Computational Solid Mechanics Research Laboratory, UTM. His active research programs cover the development of constitutive and damage models of engineering materials with applications in solder joint reliability, mechanics of fiber-reinforced composite laminates and reliability of steel wire ropes.

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Johar, M., Wong, K.J., Rashidi, S.A. et al. Effect of strain-rate and moisture content on the mechanical properties of adhesively bonded joints. J Mech Sci Technol 34, 1837–1845 (2020). https://doi.org/10.1007/s12206-020-0404-0

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  • DOI: https://doi.org/10.1007/s12206-020-0404-0

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