Visco‐elasto‐plastic constitutive model of adhesives under uniaxial compression in a range of strain rates

Wang, Z. and Li, P. (2020) Visco‐elasto‐plastic constitutive model of adhesives under uniaxial compression in a range of strain rates. Journal of Applied Polymer Science, 137(33), 48962. (doi: 10.1002/app.48962)

Abstract

Determining the constitutive model of adhesives enables the prediction of the mechanical response of hybrid structures in which the adhesive is used. In this study, the stress–strain behavior of a two‐component structural adhesive was first measured in uniaxial compression experiments at the strain rates ranging from 0.001 to 2600 s−1 for developing a constitutive model. It was found that the compressive response, including elastic modulus, yield strength, and plastic flow stress, is substantially influenced by the strain rate. In plastic deformation, the strain rate sensitivity is not constant but varies with the rate; moreover, strain softening and hardening dominate the plastic deformation at low and high strains, respectively. A visco‐elasto‐plastic constitutive model was then proposed for the adhesive, integrating the strain rate sensitivity that was quantified by empirical equations. The model which was validated can reliably represent the strain rate dependent compressive behavior of the adhesive.

• Item Type: Articles
• Additional Information: The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Grant No.: 11802028), the China Postdoctoral Science Foundation (2019M650502), and the Academic Research Fund (AcRF) Tier 1 by Ministry of Education in Singapore. Z.W. also thanks the Nanyang Technological University (NTU) Research Student Scholarship for his Ph.D. study during which this work was carried out.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Li, Dr Peifeng
• Authors: Wang, Z., and Li, P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Journal of Applied Polymer Science
• Publisher: Wiley
• ISSN: 0021-8995
• ISSN (Online): 1097-4628
• Published Online: 17 January 2020
• Copyright Holders: Copyright © 2020 Wiley Periodicals, Inc.
• First Published: First published in Journal of Applied Polymer Science 137(33): 48962
• Publisher Policy: Reproduced in accordance with the publisher copyright policy