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Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements

Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements
Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements
This article is devoted to the modeling of spread kind of damages such as matrix cracking and induced delamination in symmetric and asymmetric cross-ply laminates of composite materials using cohesive elements. For matrix crack modeling, parallel rows of cohesive elements are used between every row of 2D elements in 90° layers. Delamination is also modeled by cohesive elements at the 90°/0° interface. Since matrix cracking is a diffuse kind of damage mechanism, application of cohesive elements is not straightforward, and special techniques are necessary to resolve the modeling difficulties. For this purpose, two techniques of "bisecting" and "random distribution of strength of cohesive elements" are proposed here. Both techniques are applied to various symmetric laminates of [0/903]s and [90n/0]s (n=1 to 3). The predicted stiffness and damage progresses from both techniques are in good agreement with the experimental results. Then, asymmetric cross-ply laminates of [90n/0] (n=1 to 3) are analyzed to show the capability of this method in progressive damage analyses. The proposed method is less restricted in comparison with available micromechanical methods and is able to predict damage initiation, propagation and damage-mode transition for any symmetric and asymmetric cross-ply sequence. Therefore, this method can be used for development of "in-plane damage" of constitutive laws especially when specimens are subjected to complex loading and boundary conditions.
cohesive element, composite laminate, cross-ply, diffuse damage, induced delamination, numerical modeling, transverse crack
0954-4062
1392-1405
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Mohammadi, Bijan
b895f67a-7128-4b11-bf96-e06781a1d392
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Hosseini-Toudeshky, Hossein
772af740-2748-4c22-8aa3-69868fb29673
Mohammadi, Bijan
b895f67a-7128-4b11-bf96-e06781a1d392

Jalalvand, Meisam, Hosseini-Toudeshky, Hossein and Mohammadi, Bijan (2013) Numerical modeling of diffuse transverse cracks and induced delamination using cohesive elements. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 227 (7), 1392-1405. (doi:10.1177/0954406212460974).

Record type: Article

Abstract

This article is devoted to the modeling of spread kind of damages such as matrix cracking and induced delamination in symmetric and asymmetric cross-ply laminates of composite materials using cohesive elements. For matrix crack modeling, parallel rows of cohesive elements are used between every row of 2D elements in 90° layers. Delamination is also modeled by cohesive elements at the 90°/0° interface. Since matrix cracking is a diffuse kind of damage mechanism, application of cohesive elements is not straightforward, and special techniques are necessary to resolve the modeling difficulties. For this purpose, two techniques of "bisecting" and "random distribution of strength of cohesive elements" are proposed here. Both techniques are applied to various symmetric laminates of [0/903]s and [90n/0]s (n=1 to 3). The predicted stiffness and damage progresses from both techniques are in good agreement with the experimental results. Then, asymmetric cross-ply laminates of [90n/0] (n=1 to 3) are analyzed to show the capability of this method in progressive damage analyses. The proposed method is less restricted in comparison with available micromechanical methods and is able to predict damage initiation, propagation and damage-mode transition for any symmetric and asymmetric cross-ply sequence. Therefore, this method can be used for development of "in-plane damage" of constitutive laws especially when specimens are subjected to complex loading and boundary conditions.

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More information

Accepted/In Press date: 15 August 2012
e-pub ahead of print date: 19 September 2012
Published date: 1 July 2013
Keywords: cohesive element, composite laminate, cross-ply, diffuse damage, induced delamination, numerical modeling, transverse crack

Identifiers

Local EPrints ID: 446612
URI: http://eprints.soton.ac.uk/id/eprint/446612
ISSN: 0954-4062
PURE UUID: 1b01b43a-6537-4078-ba06-ba9b97dde2de
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 16 Feb 2021 17:31
Last modified: 18 Feb 2021 17:42

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Contributors

Author: Hossein Hosseini-Toudeshky
Author: Bijan Mohammadi

University divisions

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