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

作　　者：Kerati Suwanpakpraek Baramee Patamaprohm Sacharuck Pornpeerakeat Arisara Chaikittiratana 

机构地区：[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

出　　处：《Computer Modeling in Engineering & Sciences》2023年第6期1765-1778,共14页工程与科学中的计算机建模（英文）

基　　金：funded by King Mongkut’s University of Technology North Bangkok.Contract No.KMUTNB-PHD-62-07.

摘　　要：This paper deals with the numerical implementation of the exponential Drucker-Parger plasticitymodel 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.

关 键 词：Exponential Drucker-Prager model modified-Arcan test finite element analysis plastic potential function 

分 类 号：TB115[理学—数学]