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Finite Element Implementation of the Exponential Drucker–Prager Plasticity Model for Adhesive Joints

Kerati Suwanpakpraek1,3, Baramee Patamaprohm1,3, Sacharuck Pornpeerakeat2,3, Arisara Chaikittiratana1,3,*
1 Department of Mechanical and Aerospace Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, Thailand
2 Department of Teacher Training in Civil Engineering, Faculty of Technical Education, King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, Thailand
3 KMUTNB–TU Chemnitz Collaborative Center for Lightweight Structures Technologies (LiST), King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, Thailand
* Corresponding Author: Arisara Chaikittiratana. Email:

Computer Modeling in Engineering & Sciences 2023, 135(3), 1765-1778. https://doi.org/10.32604/cmes.2023.022523

Received 14 March 2022; Accepted 12 July 2022; Issue published 23 November 2022

Abstract

This paper deals with the numerical implementation of the exponential Drucker-Parger plasticity model in the commercial finite element software, ABAQUS, via user subroutine UMAT for adhesive joint simulations. The influence of hydrostatic pressure on adhesive strength was investigated by a modified Arcan fixture designed particularly to induce a different state of hydrostatic pressure within an adhesive layer. The developed user subroutine UMAT, which utilizes an associated plastic flow during a plastic deformation, can provide a good agreement between the simulations and the experimental data. Better numerical stability at highly positive hydrostatic pressure loads for a very high order of exponential function can also be achieved compared to when a non-associated flow is used.


Graphical Abstract

Finite Element Implementation of the Exponential Drucker–Prager Plasticity Model for Adhesive Joints

Keywords

Exponential Drucker-Prager model; modified-Arcan test; finite element analysis; plastic potential function

Cite This Article

Suwanpakpraek, K., Patamaprohm, B., Pornpeerakeat, S., Chaikittiratana, A. (2023). Finite Element Implementation of the Exponential Drucker–Prager Plasticity Model for Adhesive Joints. CMES-Computer Modeling in Engineering & Sciences, 135(3), 1765–1778.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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