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Visco‐elasto‐plastic constitutive model of adhesives under uniaxial compression in a range of strain rates
Author(s) -
Wang Zhiyong,
Li Peifeng
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48962
Subject(s) - materials science , strain rate , adhesive , constitutive equation , composite material , compression (physics) , plasticity , hardening (computing) , softening , strain hardening exponent , viscoelasticity , deformation (meteorology) , strain (injury) , flow stress , structural engineering , finite element method , medicine , layer (electronics) , engineering
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. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48962.