Effect of Asymmetric Constitutive Behavior on Scratch-Induced Deformation of Polymers
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Numerical modeling and experimental work were performed to establish a correlation between the bulk mechanical properties and scratch-induced deformation features in polymers. Three-dimensional finite element method (FEM) parametric study was carried out to investigate the effect of asymmetric tension-compression constitutive behavior on scratch-induced deformation of polymers. The scratch depth and shoulder height of the groove formed during the scratch was analyzed by considering different hypothetical asymmetric tension-compression constitutive behaviors. Experimental work on a set of model polymers was also carried out to validate the FEM findings following the ASTM D7027-05 scratch testing protocol. The results indicate that the compressive behavior, not the tensile behavior, dominates the scratch depth and shoulder height formation. Implication of the present findings for designing scratch resistant polymers is discussed. © 2012 Springer Science+Business Media, LLC.
author list (cited authors)
Hossain, M. M., Browning, R., Minkwitz, R., & Sue, H.