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Effect of strain rate on the uni-axial stress-strain behavior of highly cross-linked epoxy resin
Journal
Procedia Structural Integrity
Date Issued
2022-01-01
Author(s)
Mishra, Kushal
Singh, Aparna
Abstract
The behavior of highly cross-linked epoxy resin subjected to varying strain rates is evaluated under uniaxial tension and compression. Under compression, where deformation is dominated by shear transformation zone-based shear yielding phenomenon, the elastic modulus, yield strength, and percentage softening post yielding increase as strain rate increases. Under tension, where deformation is dominated by local tensile stress-based crazing phenomenon, both the strain at fracture and fracture stress initially decrease up to a strain rate of 0.02 s-1. Hereafter, as the strain rate increases to 0.2 s-1, there is a slight increase in the tensile strain, and the tensile stress reaches the maximum values. This is attributed to a varying dominance of crazing mechanism from disentanglement to chain scission as strain rate is increased
Subjects