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    Rights statement: This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 279, 2021 DOI: 10.1016/j.compstruct.2021.114856

    Accepted author manuscript, 3.28 MB, PDF document

    Embargo ends: 22/10/22

    Available under license: CC BY-NC-ND

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Microscale damage evolutions in fiber-reinforced composites with different initial defects

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Article number114856
<mark>Journal publication date</mark>1/01/2022
<mark>Journal</mark>Composite Structures
Volume279
Number of pages14
Publication StatusPublished
Early online date22/10/21
<mark>Original language</mark>English

Abstract

In this study, an effective microscale model for fiber-reinforced composites with initial damages is presented to investigate local stress distribution and damage evolution at constitutive material level. To validate the proposed numerical model, experimental data of uniaxial stress–strain responses and off-axis failure strength are employed for a comparison, and a good agreement by comparing with numerical results can be found. To represent the microscale damage evolution in the representative volume element, stiffness degradation coefficients are subtly applied to describe the failure sub-cells. Moreover, microscale damage evolutions and local stress distribution in the composites subjected to uniaxial and biaxial loads are both investigated. The effect of three different modes of initial damage in the composites are studied. The influences of the distribution, location and orientation of initial damage on damage evolutions are also studied.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 279, 2021 DOI: 10.1016/j.compstruct.2021.114856