Exploring the strain rate influence on shear yield behavior of acrylonitrile-butadiene-styrene: Experimental and numerical study.

This article focuses on investigating the effect of strain rate on the shear yield behavior of Acrylonitrile-Butadiene-Styrene (ABS), an amorphous polymer widely used in structural applications. Using the Wyoming version of the Iosipescu (V-notched) shear test at strain rates from 5.5 × 10⁻⁴ s⁻¹ to 7 × 10⁻¹ s⁻¹, the study found that ABS's shear yield strength increases significantly with strain rate and is more sensitive to strain rate than its tensile and compressive yield strengths. The hydrostatic pressure sensitivity parameter (α) was determined most effectively using shear-tension test data pairs at identical strain rates. Finite element analyses employing an elastic-viscoplastic constitutive model accurately predicted the strain rate-dependent shear behavior, though slight overestimations were attributed to differences in strain rate and hydrostatic pressure sensitivity parameters used in simulations. The findings highlight complexities in stress distribution due to notch effects and tensile components in the shear zone, advancing the understanding of ABS's mechanical response under shear loading for research and engineering applications.