Point-wise evaluation of the growth driving direction for arbitrarily shaped delamination fronts using cohesive elements

Carreras, Laura; Bak, Brian Lau Verndal; Turón, A.; Lindgaard, Esben

doi:10.1016/j.euromechsol.2018.05.006

Cited by 34 publications

(14 citation statements)

References 24 publications

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“…This is similar to criteria 1 and 2 of the approach proposed in Ref. [26]. In this study, the 𝐺 𝐺 ⁄ value at a given location on the 4-IP mid-plane is interpolated by the combination of linear shape functions and the 𝐺 𝐺 ⁄ values associated with four IPs of a 4-IP cohesive element.…”

Section: Extension To 4-ip Cohesive Elementsmentioning

confidence: 73%

“…Ref. [26]. Kawashita and Hallett proposed a crack-tip tracking fatigue algorithm that assumes that only the crack-tip element experiences fatigue degradation [13]; the d𝐷 d𝑁 ⁄ of a crack-tip element was evaluated by the element length measured along the crack propagation direction and a modified Paris law, without the need to know the total cohesive zone length.…”

Section: Introductionmentioning

confidence: 99%

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Composites fatigue delamination prediction using double load envelopes and twin cohesive models

Zhang

Kawashita

Hallett

2020

Composites Part A: Applied Science and Manufacturing

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Section: Extension To 4-ip Cohesive Elementsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Composites fatigue delamination prediction using double load envelopes and twin cohesive models

Zhang

Kawashita

Hallett

2020

Composites Part A: Applied Science and Manufacturing

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“…Conversely, if a CZM approach is used, the crack front is not defined by a line, but there is a band of damaged material ahead of the crack tip, and thus the normal direction to a front line does not apply. In this case, the concept of growth driving direction (GDD) [41] can be used. The GDD can be defined as the gradient vector field of the total specific work, ω tot , over the fracture toughness, G c , with respect to the coordinates tangent to the mid-surface (c.f.…”

Section: Fatigue Damage Rate Modelmentioning

confidence: 99%

“…It is based on the link between the crack growth rate, da/dN , and the damage rate, dD/dN presented in [34]. An efficient methodology to determine the growth driving direction in 3D analysis [41] is used. In addition, the model uses a 3D CZ J-integral formulation [42] for calculating the mode-decomposed energy release rates.…”

Section: Introductionmentioning

confidence: 99%

“…It can be visually inspected that the values for the GDD correspond to the angle of the normal to the delamination front with the global X 1 -axis. More accurate demonstrations of the capabilities of the GDD formulation are provided in[41]. InFigure 13.a, it can be observed that the computed J-integral during quasi-static propagation (Step 1) is equal to the mode I fracture toughness, G Ic .…”

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confidence: 99%

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A simulation method for fatigue-driven delamination in layered structures involving non-negligible fracture process zones and arbitrarily shaped crack fronts

Carreras

Turón

Bak

et al. 2019

Composites Part A: Applied Science and Manufacturing

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Most of the existing methods for fatigue-driven delamination are limited to two-dimensional (2D) applications or their predictive capabilities have not been validated in three-dimensional (3D) problems.This work presents a new cohesive zone-based computational method for simulating fatigue-driven delamination in the analysis of 3D structures without crack migration. The method accurately predicts fatigue propagation of non-nelgigible fracture process zones with arbitrarily shaped delamination fronts.The model does not require any kind of fitting parameter since all the input parameters are obtained experimentally from coupon tests. The evaluation of the energy release rate is done using two new techniques recently developed by the authors (the growth driving direction and the mode-decomposed J-integral) leading to an accurate prediction of delamination propagation under mixed-mode and nonself-similar growing conditions. The new method has been implemented as a UEL for Abaqus and validated against an experimental benchmark case with varying crack growth rate and shape and extension of the fracture process zone.

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Harnessing Extrinsic Dissipation to Enhance the Toughness of Composites and Composite Joints: A State‐of‐the‐Art Review of Recent Advances

Lubineau,

Alfano,

Tao

et al. 2024

Advanced Materials

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Interfaces play a critical role in modern structures, where integrating multiple materials and components is essential to achieve specific functions. Enhancing the mechanical performance of these interfaces, particularly their resistance to delamination, is essential to enable extremely lightweight designs and improve energy efficiency. Improving toughness (or increasing energy dissipation during delamination) has traditionally involved modifying materials to navigate the well‐known strength‐toughness trade‐off. However, a more effective strategy involves promoting non‐local or extrinsic energy dissipation. This approach encompasses complex degradation phenomena that extend beyond the crack tip, such as long‐range bridging, crack fragmentation, and ligament formation. This work explores this innovative strategy within the arena of laminated structures, with a particular focus on fiber‐reinforced polymers. This review highlights the substantial potential for improvement by presenting various strategies, from basic principles to proof‐of‐concept applications. This approach represents a significant design direction for integrating materials and structures, especially relevant in the emerging era of additive manufacturing. However, it also comes with new challenges in predictive modeling of such mechanisms at the structural scale, and here the latest development in this direction is highlighted. Through this perspective, greater durability and performance in advanced structural applications can be achieved.

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Point-wise evaluation of the growth driving direction for arbitrarily shaped delamination fronts using cohesive elements

Abstract: Point-wise evaluation of the growth driving direction for arbitrarily shaped delamination fronts using cohesive elements

Cited by 34 publications

References 24 publications

Composites fatigue delamination prediction using double load envelopes and twin cohesive models

Composites fatigue delamination prediction using double load envelopes and twin cohesive models

A simulation method for fatigue-driven delamination in layered structures involving non-negligible fracture process zones and arbitrarily shaped crack fronts

Harnessing Extrinsic Dissipation to Enhance the Toughness of Composites and Composite Joints: A State‐of‐the‐Art Review of Recent Advances

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