Numerical implementation, comparison and validation of a pressure dependent model for polymer composites

• Published in: International journal of mechanical sciences 2021-12, Vol.212, p.106818, Article 106818
• Main Authors: Xu, Kailong, Chen, Wei, Liu, Lulu, Zhao, Zhenhua, Luo, Gang
• Format: Article
• Language: English
• Subjects: Elasto-plastic damage; Numerical algorithm; Polymer composites; Pressure-dependent; UMAT
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2021.106818

•A pressure-dependent elasto-plastic damage model is developed.•Two numerical algorithms, implicit and explicit, respectively are implemented for the elasto-plastic constitutive model.•The explicit algorithm is more efficient than implicit algorithm, facilitating the large-scale engineering applications. [Display omitted] A pressure-dependent elastoplastic damage constitutive model for polymer composites is established, in which the Implicit and Explicit numerical algorithm has been implemented in ABAQUS/Standard in terms of elasto-plastic phase with the aid of UMAT. The off-axis tension/compression tests for T800H/3633,T800S/3900-2B carbon/epoxy laminated composites, and quasi-isotropic compression tests for T800H/3633 laminated composites, have been simulated, in order to validate the efficiencies and accuracies of two algorithms. Additionally, the open-hole compression simulation is employed to analyze the progressive failure of T800H/3633 laminated composites. Compared with the Implicit and Explicit algorithm based the elasto-plastic model, the Explicit algorithm is recommended based on the computational efficiency on the premise of ensuring the numerical convergence, which may be extended to the large-scale engineering applications either statics or dynamics. Furthermore, the open-hole compression simulation of T800H/3633 composites shows the developed elasto-plastic damage model can predict well the stiffness and strength properties of the specimen. The failure mode and deformation of the open-hole specimen of T800H/3633 composites are also briefly discussed.