A meso-scale simulation framework for predicting the mechanical response of triaxial braided composites

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Title: A meso-scale simulation framework for predicting the mechanical response of triaxial braided composites
Author(s): Wehrkamp-Richter, T
Carvalho, N
Pinho, ST
Item Type: Journal Article
Abstract: In this paper, we propose a novel simulation framework for accurately predicting the mechanical response of highly compacted triaxial braided composites using meso-scale finite element models. Unit cells with a realistic internal geometry are generated within an automated simulation work-flow. Local volumetric interpenetrations are removed from a nominal geometry in a fictitious thermal simulation step. A compaction simulation of a single textile layer is performed to the desired target fibre volume fraction while implicitly considering multiple plies in different nesting configurations through periodic boundary conditions. For mechanical simulation, a matrix pocket mesh is created from a reconstruction of the deformed textile. A novel meshing methodology incorporates branching cohesive yarn-to-yarn and yarn-to matrix interfaces for modelling delamination. The framework was validated by detailed comparison with experimental results for three braid architectures. The excellent correlation of the internal geometry and the elastic properties underlines the framework’s potential for future damage modelling.
Publication Date: 20-Feb-2018
Date of Acceptance: 24-Jan-2018
URI: http://hdl.handle.net/10044/1/56592
DOI: https://dx.doi.org/10.1016/j.compositesa.2018.01.028
ISSN: 1359-835X
Publisher: Elsevier
Start Page: 489
End Page: 506
Journal / Book Title: Composites Part A: Applied Science and Manufacturing
Volume: 107
Copyright Statement: © 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/M002500/1
Keywords: 0912 Materials Engineering
0913 Mechanical Engineering
0901 Aerospace Engineering
Publication Status: Published
Embargo Date: 2019-02-20
Appears in Collections:Faculty of Engineering

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