An adaptive floating node based formulation for the analysis of multiple delaminations under quasi-static loading

Journal article (2022)

Authors

Guillem Gall Trabal Aalborg University
Brian Lau Verndal Bak Aalborg University
B. Y. Chen Aerospace Structures & Computational Mechanics - Aerospace Engineering
Esben Lindgaard Aalborg University
Research Group
Aerospace Structures & Computational Mechanics (Aerospace Engineering) (TU Delft)
Copyright: © 2022 Guillem Gall Trabal, Brian Lau Verndal Bak, B. Y. Chen, Esben Lindgaard
DOI
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https://doi.org/10.1016/j.compositesa.2022.106846
Delamination Floating node method Adaptive refinement Cohesive element Laminated composite structures
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Published Date

2022

Language

English

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Aerospace Structures & Computational Mechanics

Abstract

A novel and efficient numerical formulation for the modelling of multiple delaminations growth in laminated composite materials subjected to quasi-static loading is presented. The proposed formulation alleviates the high computational cost associated with models featuring cohesive elements by using a novel Adaptive Refinement Scheme and an Adaptive Floating Node Method Element to refine the model effectively during the analysis without modifying the global finite element connectivity. The formulation has been implemented in a MATLAB finite element code and validated with single and multiple delamination numerical models with varying mode mixities. The new formulation provides accurate results comparable to standard fully refined finite element models while drastically lowering the computational time of the analysis.