Experimental investigation of the effect of interface angle on mode-I fracture toughness in DCB laminates using digital image correlation

Linlin Deng; Liu Liu; John Alan Pascoe; René Alderliesten

doi:10.1016/j.engfracmech.2025.110988

Experimental investigation of the effect of interface angle on mode-I fracture toughness in DCB laminates using digital image correlation

Linlin Deng, Liu Liu^*, John Alan Pascoe, René Alderliesten

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

This study investigates the Mode-I fracture toughness of laminates with varying interface angles. A method for identifying crack tip location using grayscale characteristic parameters in DIC is proposed. The findings demonstrate that both initial and steady-state fracture toughness exhibit a bilinear relationship with interface angle. A cohesive constitutive model incorporating the interface angle was developed and integrated into a double cantilever beam finite element model, predicting delamination propagation behavior that was highly consistent with experimental results. Numerical analysis suggests that zigzag cracks may improve fracture toughness before steady-state toughness is achieved, with peak toughness correlating to the length of the zigzag cracks.

Original language	English
Article number	110988
Number of pages	17
Journal	Engineering Fracture Mechanics
Volume	319
DOIs	https://doi.org/10.1016/j.engfracmech.2025.110988
Publication status	Published - 2025

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Correlation function
Interface angle
Mode-I fracture toughness
Traction–separation law
Zigzag crack

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10.1016/j.engfracmech.2025.110988

1-s2.0-S0013794425001894-mainFinal published version, 6.11 MB

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title = "Experimental investigation of the effect of interface angle on mode-I fracture toughness in DCB laminates using digital image correlation",

abstract = "This study investigates the Mode-I fracture toughness of laminates with varying interface angles. A method for identifying crack tip location using grayscale characteristic parameters in DIC is proposed. The findings demonstrate that both initial and steady-state fracture toughness exhibit a bilinear relationship with interface angle. A cohesive constitutive model incorporating the interface angle was developed and integrated into a double cantilever beam finite element model, predicting delamination propagation behavior that was highly consistent with experimental results. Numerical analysis suggests that zigzag cracks may improve fracture toughness before steady-state toughness is achieved, with peak toughness correlating to the length of the zigzag cracks.",

keywords = "Correlation function, Interface angle, Mode-I fracture toughness, Traction–separation law, Zigzag crack",

author = "Linlin Deng and Liu Liu and Pascoe, \{John Alan\} and Ren{\'e} Alderliesten",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

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doi = "10.1016/j.engfracmech.2025.110988",

language = "English",

volume = "319",

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AU - Deng, Linlin

AU - Liu, Liu

AU - Pascoe, John Alan

AU - Alderliesten, René

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2025

Y1 - 2025

N2 - This study investigates the Mode-I fracture toughness of laminates with varying interface angles. A method for identifying crack tip location using grayscale characteristic parameters in DIC is proposed. The findings demonstrate that both initial and steady-state fracture toughness exhibit a bilinear relationship with interface angle. A cohesive constitutive model incorporating the interface angle was developed and integrated into a double cantilever beam finite element model, predicting delamination propagation behavior that was highly consistent with experimental results. Numerical analysis suggests that zigzag cracks may improve fracture toughness before steady-state toughness is achieved, with peak toughness correlating to the length of the zigzag cracks.

AB - This study investigates the Mode-I fracture toughness of laminates with varying interface angles. A method for identifying crack tip location using grayscale characteristic parameters in DIC is proposed. The findings demonstrate that both initial and steady-state fracture toughness exhibit a bilinear relationship with interface angle. A cohesive constitutive model incorporating the interface angle was developed and integrated into a double cantilever beam finite element model, predicting delamination propagation behavior that was highly consistent with experimental results. Numerical analysis suggests that zigzag cracks may improve fracture toughness before steady-state toughness is achieved, with peak toughness correlating to the length of the zigzag cracks.

KW - Correlation function

KW - Interface angle

KW - Mode-I fracture toughness

KW - Traction–separation law

KW - Zigzag crack

UR - https://www.scopus.com/pages/publications/86000361258

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DO - 10.1016/j.engfracmech.2025.110988

M3 - Article

AN - SCOPUS:86000361258

SN - 0013-7944

VL - 319

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 110988

ER -

Experimental investigation of the effect of interface angle on mode-I fracture toughness in DCB laminates using digital image correlation

Abstract

Bibliographical note

Keywords

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