A layered solid finite element formulation with interlaminar enhanced displacements for the modeling of laminated composite structures

Giffin, Brian D.; Zoller, Miklos J.

doi:10.1002/nme.7581

A layered solid finite element formulation with interlaminar enhanced displacements for the modeling of laminated composite structures

Journal Article · Thu Aug 08 00:00:00 EDT 2024 · International Journal for Numerical Methods in Engineering

DOI:https://doi.org/10.1002/nme.7581· OSTI ID:2439663

^[1]; Zoller, Miklos J. ^[2]

Oklahoma State Univ., Stillwater, OK (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Accurate modeling of layered composite structures often requires the use of detailed finite element models which can sufficiently resolve the kinematics and material behavior within each layer of the composite. However, individually discretizing each material layer into finite elements presents a prohibitive computational expensive given the large number of thin layers comprising some laminated composites. To address these challenges, an 8-node layered solid hexahedral finite element is formulated with the aim of striking an appropriate balance between efficiency and fidelity. The element is discretized into an arbitrary number of distinct material layers, and employs reduced in-plane integration within each layer. The chosen reduced integration scheme is supplemented by a novel physical stabilization approach which includes layerwise enhancements to mitigate various forms of locking phenomena. The proposed framework additionally supports the inclusion of interlaminar enhanced displacements to better represent the kinematics of general layered composite materials. Finally, the described element formulation has been implemented in the ParaDyn finite element code, and its efficacy for modeling laminated composite structures is demonstrated on a variety of verification problems.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 2439663

Alternate ID(s):: OSTI ID: 2429008

Report Number(s):: LLNL--JRNL-855838; 1084953

Journal Information:: International Journal for Numerical Methods in Engineering, Journal Name: International Journal for Numerical Methods in Engineering Journal Issue: 23 Vol. 125; ISSN 0029-5981

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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