Experimental characterization and modified constitutive modeling of the strain rate dependent compressive behavior of adhesives

Li, P. and Wang, Z. (2016) Experimental characterization and modified constitutive modeling of the strain rate dependent compressive behavior of adhesives. Macromolecular Materials and Engineering, 301(5), pp. 577-585. (doi:10.1002/mame.201500415)

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Abstract

Predicting the impact performance of adhesively bonded structures requires the accurate characterization and constitutive formulation of the compressive behavior of the adhesive at dynamic strain rates. In this work, the stress–strain curves of Sikaflex adhesives are measured in uniaxial compression tests at quasi-static and dynamic strain rates. The split-Hopkinson pressure bar technique is modified with the hollow output bar to effectively characterize the dynamic response of the adhesive. It is found that the Sikaflex adhesive is incompressible and hyperelastic; the compressive behavior is significantly influenced by the strain rate. The strain rate sensitivity is not constant but varies as a function of the strain and the strain rate. The strain rate effect on compressive behavior is quantified and incorporated into the phenomenological hyperelastic constitutive model based on strain energy density. The modified constitutive equation accurately represents the strain rate dependent compressive behavior of Sikaflex adhesives.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Peifeng
Authors: Li, P., and Wang, Z.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Macromolecular Materials and Engineering
Publisher:Wiley
ISSN:1438-7492
ISSN (Online):1439-2054
Published Online:10 February 2016

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