Using the Arruda-Boyce Elasto-Viscoplastic Constitutive Model to Predict the Monotonic Compressive Response of the PC/ABS 80:20

Resumo

This study evaluates the capability of the Arruda–Boyce elasto-viscoplastic model to predict the monotonic compressive response of the PC/ABS 80:20 polymer blend. A finite element model of a standard compression specimen, following ASTM D695, was developed in the commercial package ABAQUS. The model incorporates geometric, contact, and material nonlinearities via a custom VUMAT routine. It effectively captured the material’s nonlinear response, including strain softening, and showed good agreement with experimental stress–strain data. The work emphasizes the superiority of force–displacement data for constitutive calibration and demonstrates the potential of population-based optimization methods using a one-dimensional viscoplastic model implementation. These findings establish a solid basis for further extension of the model to more complex loading scenarios.