S. Wang et al., Viscoplastic modeling of ABS material under high-strain-rate uniaxial elongational deformation, J MATER SCI, 34(23), 1999, pp. 5871-5878
Uniaxial tensile tests were performed on the newest type of Meissner rheome
ter with an ABS (acrylonitrile-butadiene-styrene) material. Tests were cond
ucted for constant strain rates varying from 0.01 to 1 (1/s), at the temper
atures ranging from 150 to 200 degrees C. Based on the experimental data, a
new model was proposed, in which, strain hardening, strain rate sensitivit
y, temperature changes and the variation in the hardening index could be ta
ken into consideration. In this new model, a new parameter, w, was introduc
ed, which represents the variation in the hardening index. The proposed mod
el can approximate the experimental data of the uniaxial tensile test quite
well. Two existing models were also employed to approximate the material b
ehavior, however, both of them exhibited the poor accuracy. Finally, a simp
le stretch deformation was simulated employing the three different models,
and the differences in the final thickness and shape were confirmed. (C) 19
99 Kluwer Academic Publishers.