Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches

Guillem Gall Trabal; Brian Lau Verndal Bak; Boyang Chen; Simon Mosbjerg Jensen; Esben Lindgaard

doi:10.5075/epfl-298799_978-2-9701614-0-0

Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches

Guillem Gall Trabal, Brian Lau Verndal Bak, Boyang Chen, Simon Mosbjerg Jensen, Esben Lindgaard^*

^*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › 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 : Vol 4 – Modeling and Prediction
Editors	Anastasios Vassilopoulos, Véronique Michaud
Number of pages	8
Volume	4
Publisher	EPFL Lausanne, Composite Construction Laboratory
Publication date	2022
Pages	229-236
ISBN (Print)	978-2-9701614-0-0
DOIs	https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0
Publication status	Published - 2022
Event	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 - Lausanne, Switzerland Duration: 26 Jun 2022 → 30 Jun 2022

Conference

Conference	20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022
Country/Territory	Switzerland
City	Lausanne
Period	26/06/2022 → 30/06/2022
Sponsor	Bristol Composited Institute, et al., JEC Group, Shimadzu, Suprem, Surface Measurement Systems

Bibliographical note

Funding Information:
This work is supported by the Talent Management Programme at Aalborg University, Denmark (Internal grant number: 771120). This support is gratefully acknowledged.

Publisher Copyright:
©2022 Lindgaard et al.

Keywords

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

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10.5075/epfl-298799_978-2-9701614-0-0Licence: CC BY-NC 4.0

Open Access articleFinal published version, 12.9 MBLicence: CC BY-NC 4.0

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Trabal, G. G., Bak, B. L. V., Chen, B., Jensen, S. M., & Lindgaard, E. (2022). Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches. In A. Vassilopoulos, & V. Michaud (Eds.), Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction (Vol. 4, pp. 229-236). EPFL Lausanne, Composite Construction Laboratory. https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

Trabal, Guillem Gall ; Bak, Brian Lau Verndal ; Chen, Boyang et al. / Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches. Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. editor / Anastasios Vassilopoulos ; Véronique Michaud. Vol. 4 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 Patches",

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, Floating Node Method, multiple delamination, adaptive refinement, cohesive zone modelling",

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

note = "Funding Information: This work is supported by the Talent Management Programme at Aalborg University, Denmark (Internal grant number: 771120). This support is gratefully acknowledged. Publisher Copyright: {\textcopyright}2022 Lindgaard et al.; 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 ; Conference date: 26-06-2022 Through 30-06-2022",

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doi = "10.5075/epfl-298799_978-2-9701614-0-0",

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Trabal, GG, Bak, BLV, Chen, B, Jensen, SM & Lindgaard, E 2022, Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches. in A Vassilopoulos & V Michaud (eds), Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. vol. 4, EPFL Lausanne, Composite Construction Laboratory, pp. 229-236, 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022, Lausanne, Switzerland, 26/06/2022. https://doi.org/10.5075/epfl-298799_978-2-9701614-0-0

Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches. / Trabal, Guillem Gall; Bak, Brian Lau Verndal; Chen, Boyang et al.
Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. ed. / Anastasios Vassilopoulos; Véronique Michaud. Vol. 4 EPFL Lausanne, Composite Construction Laboratory, 2022. p. 229-236.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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T1 - Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches

AU - Trabal, Guillem Gall

AU - Bak, Brian Lau Verndal

AU - Chen, Boyang

AU - Jensen, Simon Mosbjerg

AU - Lindgaard, Esben

N1 - Funding Information: This work is supported by the Talent Management Programme at Aalborg University, Denmark (Internal grant number: 771120). This support is gratefully acknowledged. Publisher Copyright: ©2022 Lindgaard et al.

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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.

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KW - Floating Node Method

KW - multiple delamination, adaptive refinement, cohesive zone modelling

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M3 - Article in proceeding

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SN - 978-2-9701614-0-0

VL - 4

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

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Y2 - 26 June 2022 through 30 June 2022

ER -

Trabal GG, Bak BLV, Chen B, Jensen SM , Lindgaard E. Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches. In Vassilopoulos A, Michaud V, editors, Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability: Vol 4 – Modeling and Prediction. Vol. 4. EPFL Lausanne, Composite Construction Laboratory. 2022. p. 229-236 doi: 10.5075/epfl-298799_978-2-9701614-0-0

Numerical Study of the Delamination Toughening Effect of Weakening and Toughening Patches

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Keywords

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