Numerical study of the delamination toughening effect of weakening and toughening patche

Guillem Gall Trabal; Brian Lau Verndal Bak; B. Y. Chen; Simon Mosbjerg Jensen; Esben Lindgaard

Numerical study of the delamination toughening effect of weakening and toughening patche

Guillem Gall Trabal, Brian Lau Verndal Bak, B. Y. Chen, Simon Mosbjerg Jensen, Esben Lindgaard

Aerospace Structures & Computational Mechanics

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

A numerical study on the feasibility of using patches of interface weakening or toughening material to trigger multiple delaminations toughening laminated composite structures against delamination is presented. The studies use an adaptive refinement formulation that uses cohesive elements to model delamination initiation and propagation. A DCB specimen is loaded under displacement control with two cohesive interfaces and a single pre-crack is introduced in one of them. The studies show that multiple delaminations can be initiated in the secondary originally uncracked interface by placing interface toughening patches at the main pre-cracked interface or interface weakening patches at the secondary one. The energy dissipation significantly increases compared to a standard DCB specimen featuring a single delamination.

Original language	English
Title of host publication	Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability
Subtitle of host publication	Vol 4 – Modeling and Prediction
Editors	Anastasios P. Vassilopoulos , Véronique Michaud
Place of Publication	Lausanne
Publisher	EPFL Lausanne, Composite Construction Laboratory
Pages	229-236
Number of pages	8
ISBN (Electronic)	978-2-9701614-0-0
Publication status	Published - 2022
Event	20th European Conference on Composite Materials: Composites Meet Sustainability - Lausanne, Switzerland Duration: 26 Jun 2022 → 30 Jun 2022 Conference number: 20

Conference

Conference	20th European Conference on Composite Materials
Abbreviated title	ECCM20
Country/Territory	Switzerland
City	Lausanne
Period	26/06/22 → 30/06/22

Keywords

Delamination toughening
multiple delamination
adaptive refinement
cohesive zone modelling
Floating Node Method

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ECCM2018Final published version, 12.9 MBLicence: CC BY

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Trabal, G. G., Bak, B. L. V., Chen, B. Y., Jensen, S. M., & Lindgaard, E. (2022). Numerical study of the delamination toughening effect of weakening and toughening patche. In A. P. Vassilopoulos , & V. Michaud (Eds.), Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction (pp. 229-236). EPFL Lausanne, Composite Construction Laboratory.

Trabal, Guillem Gall ; Bak, Brian Lau Verndal ; Chen, B. Y. et al. / Numerical study of the delamination toughening effect of weakening and toughening patche. Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. editor / Anastasios P. Vassilopoulos ; Véronique Michaud . Lausanne : EPFL Lausanne, Composite Construction Laboratory, 2022. pp. 229-236

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title = "Numerical study of the delamination toughening effect of weakening and toughening patche",

abstract = "A numerical study on the feasibility of using patches of interface weakening or toughening material to trigger multiple delaminations toughening laminated composite structures against delamination is presented. The studies use an adaptive refinement formulation that uses cohesive elements to model delamination initiation and propagation. A DCB specimen is loaded under displacement control with two cohesive interfaces and a single pre-crack is introduced in one of them. The studies show that multiple delaminations can be initiated in the secondary originally uncracked interface by placing interface toughening patches at the main pre-cracked interface or interface weakening patches at the secondary one. The energy dissipation significantly increases compared to a standard DCB specimen featuring a single delamination. ",

keywords = "Delamination toughening, multiple delamination, adaptive refinement, cohesive zone modelling, Floating Node Method",

author = "Trabal, {Guillem Gall} and Bak, {Brian Lau Verndal} and Chen, {B. Y.} and Jensen, {Simon Mosbjerg} and Esben Lindgaard",

year = "2022",

language = "English",

pages = "229--236",

editor = "{Vassilopoulos }, {Anastasios P. } and {Michaud }, {V{\'e}ronique }",

booktitle = "Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability",

publisher = "EPFL Lausanne, Composite Construction Laboratory",

note = "20th European Conference on Composite Materials : Composites Meet Sustainability, ECCM20 ; Conference date: 26-06-2022 Through 30-06-2022",

}

Trabal, GG, Bak, BLV, Chen, BY, Jensen, SM & Lindgaard, E 2022, Numerical study of the delamination toughening effect of weakening and toughening patche. in AP Vassilopoulos & V Michaud (eds), Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. EPFL Lausanne, Composite Construction Laboratory, Lausanne, pp. 229-236, 20th European Conference on Composite Materials, Lausanne, Switzerland, 26/06/22.

Numerical study of the delamination toughening effect of weakening and toughening patche. / Trabal, Guillem Gall; Bak, Brian Lau Verndal; Chen, B. Y. et al.
Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. ed. / Anastasios P. Vassilopoulos ; Véronique Michaud . Lausanne: EPFL Lausanne, Composite Construction Laboratory, 2022. p. 229-236.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Numerical study of the delamination toughening effect of weakening and toughening patche

AU - Trabal, Guillem Gall

AU - Bak, Brian Lau Verndal

AU - Chen, B. Y.

AU - Jensen, Simon Mosbjerg

AU - Lindgaard, Esben

N1 - Conference code: 20

PY - 2022

Y1 - 2022

N2 - A numerical study on the feasibility of using patches of interface weakening or toughening material to trigger multiple delaminations toughening laminated composite structures against delamination is presented. The studies use an adaptive refinement formulation that uses cohesive elements to model delamination initiation and propagation. A DCB specimen is loaded under displacement control with two cohesive interfaces and a single pre-crack is introduced in one of them. The studies show that multiple delaminations can be initiated in the secondary originally uncracked interface by placing interface toughening patches at the main pre-cracked interface or interface weakening patches at the secondary one. The energy dissipation significantly increases compared to a standard DCB specimen featuring a single delamination.

AB - A numerical study on the feasibility of using patches of interface weakening or toughening material to trigger multiple delaminations toughening laminated composite structures against delamination is presented. The studies use an adaptive refinement formulation that uses cohesive elements to model delamination initiation and propagation. A DCB specimen is loaded under displacement control with two cohesive interfaces and a single pre-crack is introduced in one of them. The studies show that multiple delaminations can be initiated in the secondary originally uncracked interface by placing interface toughening patches at the main pre-cracked interface or interface weakening patches at the secondary one. The energy dissipation significantly increases compared to a standard DCB specimen featuring a single delamination.

KW - Delamination toughening

KW - multiple delamination

KW - adaptive refinement

KW - cohesive zone modelling

KW - Floating Node Method

M3 - Conference contribution

SP - 229

EP - 236

BT - Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability

A2 - Vassilopoulos , Anastasios P.

A2 - Michaud , Véronique

PB - EPFL Lausanne, Composite Construction Laboratory

CY - Lausanne

T2 - 20th European Conference on Composite Materials

Y2 - 26 June 2022 through 30 June 2022

ER -

Trabal GG, Bak BLV, Chen BY, Jensen SM, Lindgaard E. Numerical study of the delamination toughening effect of weakening and toughening patche. In Vassilopoulos AP, Michaud V, editors, Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. Lausanne: EPFL Lausanne, Composite Construction Laboratory. 2022. p. 229-236

Numerical study of the delamination toughening effect of weakening and toughening patche

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Keywords

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