A 3-Node Co-Rotational Triangular Finite Element for Non-Smooth, Folded and Multi-Shell Laminated Composite Structures

Li, Zhongxue; Ji, Jiawei; Vu‐Quoc, L.; Izzuddin, B.A.; Xin, Zhuo

doi:10.32604/cmes.2021.016050

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2023

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“…In this direction, the compressive stress induced by the fixture strengthens the adhesive joint, so its strength is close to the interface strength leading to the mixed failure mode. The interface element option in ABAQUS [14][15][16] was not used in this work since the developed UMAT focuses only on material behavior. This limitation opens the way to further development of this UMAT.…”

Section: Resultsmentioning

confidence: 99%

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

Suwanpakpraek¹,

Patamaprohm²,

Pornpeerakeat³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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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.

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Section: Resultsmentioning

confidence: 99%