A Study of Yielding and Plasticity of Rapid Prototyped ABS

Abstract

In this article, the yielding and plastic flow of a rapid-prototyped ABS compound was investigated for various plane stress states. The experimental procedures consisted of multiaxial tests performed on an Arcan device on specimens manufactured through photopolymerization. Numerical analyses were employed in order to determine the yield points for each stress state configuration. The results were used for the calibration of the Hosford yield criterion and flow potential. Numerical analyses performed on identical specimen models and test configurations yielded results that are in accordance with the experimental data.

Failure Locus of an ABS-Based Compound Manufactured through Photopolymerization

“…Finite element analyses were performed in the commercial software Abaqus/CAE 2019 (Dassault Systèmes, Vélizy-Villacoublay, France), using the implicit solver (Abaqus Standard) on models based on the geometries used for rapid prototyping, reduced to the region contained between the extensometer grips. The material formulation used consisted of an elastic-plastic formulation with multi-linear isotropic hardening (detailed in [19,22]). The bottom of the model was fixed while a different displacement was applied to the top of the model for each geometry, corresponding to the travel recorded by the extensometer at specimen failure.…”

“…The Arcan tests were described in detail in [22]. The experimental procedures were performed on rapid prototyped butterfly-shaped specimens, the design being based on the geometry proposed by Bai and Wierzbicki [10], so that the critical region was located in the middle of the specimen, as shown in Figure 14 [22]. The numerical analyses (detailed in [22]) were performed using the same material model as the previous loading scenarios.…”

“…The experimental procedures were performed on rapid prototyped butterfly-shaped specimens, the design being based on the geometry proposed by Bai and Wierzbicki [10], so that the critical region was located in the middle of the specimen, as shown in Figure 14 [22]. The numerical analyses (detailed in [22]) were performed using the same material model as the previous loading scenarios. Multi-point constraints were used to link the pin holes from each side of the specimens to control points.…”

“…Void occurrence during Arcan tests.Five orientations of the Arcan device were used: 0• , 15• , 30• , 45•and 90 • providing different states of stress triaxiality, from pure shear (η = 0, ξ = 0) to uniaxial tension (η = 0.33, ξ = 1). The tests were performed on a 5 kN Zwick universal testing machine at mm mm −1 crosshead travel speed at room temperature.The numerical analyses (detailed in[22]) were performed using the same material model as the previous loading scenarios. Multi-point constraints were used to link the pin holes from each side of the specimens to control points.…”