Enhanced cohesive zone model to predict delamination behavior of carbon/epoxy laminated curved beams

Ranz, David; Cuartero, J.; Castejón, Luis; Buil, Ramón Miralbés; Valladares, David

doi:10.1080/15376494.2020.1769232

Cited by 10 publications

(3 citation statements)

References 29 publications

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“…With the advent of computing facilities, this approach has been developed and suitably modified by many researchers over the years (Harris and Adams, 1984; Makhecha et al ., 2009; Zhang et al ., 2015). Recently Ranz et al . (2020) also proposed the enhanced CZM concept to simulate the delamination in composite beams.…”

Section: Methodsmentioning

confidence: 99%

“…With the advent of computing facilities, this approach has been developed and suitably modified by many researchers over the years (Harris and Adams, 1984;Makhecha et al, 2009;Zhang et al, 2015). Recently Ranz et al (2020) also proposed the enhanced CZM concept to simulate the delamination in composite beams. The CZM is based on the damage-mechanics approach, which makes use of cohesive elements positioned in the plane of possible damage occurrence and allows for the progressive tracking of the initiation and propagation of de-bond-like damage in the adhesive.…”

Section: Cohesive Failurementioning

confidence: 99%

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Effect of adhesive de-bond and crack in adherent plate on single lap joint with bi-adhesive

Chikmath

Ramanath

Imtiaz

et al. 2023

IJSI

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PurposeThis paper aims to study the benefits of use of bi-adhesive (combination of two different adhesives) over conventional single adhesive in bonded lap joints. Characterise damage severity due to cohesive and adherent failure as feedback for operating load levels that assist in developing damage tolerance design of the adhesively bonded joints.Design/methodology/approachSingle lap joint where the adherent plate is made up of aluminium alloy joined together with bi-adhesives is analysed. The nature of adhesives ranges from brittle, elastic-plastic, moderately ductile to largely ductile. Numerical analysis is performed considering the material and geometric non-linear behaviour of the joint. The optimum bond ratio of bi-adhesives and the effect of the location of adhesive on the stress distribution are studied. The cohesive zone modelling (CZM) is adopted to account for the cohesive failure of the joint. The adherent plate failure is also addressed by modelling and studying the behaviour of the crack at different locations in the plate using modified virtual crack closure integral (MVCCI).FindingsThe results obtained from the stress analysis show some important characteristic behaviour of the bi-adhesive joint. Although bi-adhesive is expected to result in improved joint strength, the purpose gets defeated if a brittle adhesive is used at the corners and ductile adhesive at the middle. The joint strength based on CZM, evaluated for a single adhesive, is in good comparison with the experimental results from the literature. Also, the location of the crack in the adherent plate plays a significant role in the failure of the joint.Originality/valueEstimating joint strength for the bi-adhesive model using CZM and evaluating damage severity in the presence of de-bond and crack in the bi-adhesive lap joint model assists in developing robust damage tolerance design models of such joints.

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Section: Methodsmentioning

confidence: 99%

Section: Cohesive Failurementioning

confidence: 99%

Effect of adhesive de-bond and crack in adherent plate on single lap joint with bi-adhesive

Chikmath

Ramanath

Imtiaz

et al. 2023

IJSI

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“…Luinge and Warnet [8] investigated the applicability of replacing recycled chopped thermoplastic laminates after stamp forming as a middle layer of a laminated beam, which is subjected to bending and bearing load, as well as a curved beam test for the use of an aerospace bracket. Ranz et al [9] proposed an improved cohesive zone numerical model that took account of the fiber bridging and the change in the element size in the bend for the better agreement of delamination in carbon/epoxy curved beams with experimental results. Xu et al [10] investigated the effect of out-of-plane wrinkles as a defect due to manufacturing curved carbon/epoxy structures on the interlaminar tensile strength and found an up to 16% reduction in strength.…”

Section: Introductionmentioning

confidence: 99%

Delamination Strength Comparison of Additively Manufactured Composite Curved Beams Using Continuous Fibers

Süsler,

Kazancı

2023

Polymers

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The objective of this study is to show the applicability of various 3D-printed composite curved beams using continuous fibers and their delamination strength when they are subjected to bending loading. Four-point bending tests are configured for comparative research on evaluating the effect of fiber types on the delamination strength and failure mode. Out-of-plane tensile properties are calculated analytically by using experimental data. The number of curved beams per build during multiple printing is examined to observe the effect of delay time between each deposited layer of parts. Macro-scale finite element simulations including surface-based cohesive concept for the selected 3D-printed composite curved beam design are also presented and compared. The analytical results show that carbon fiber reinforced curved beam design is superior to the other fiber types by at least 18% in the interlaminar tensile strength and is relatively challenging against the conventionally manufactured composite curved beams in the literature despite its low fiber volume ratio. There is no gross effect of delay time between each deposited layer of parts, although printing a single sample is favorable for better strength. There is a presence of compatibility between the analytical and numerical results as the percentage difference for maximum load, radial tensile strength and maximum displacement are found as 1.8%, 2.4% and 1.5%, respectively, in a 3D cohesive model. A 2D cohesive model offers a fast solution and a competitive agreement with test results when the 2D and 3D finite element models are compared.

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Progressive failure simulation of angled composite beams subject to flexural loading

Roach,

Zhang

2024

Composite Structures

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Enhanced cohesive zone model to predict delamination behavior of carbon/epoxy laminated curved beams

Cited by 10 publications

References 29 publications

Effect of adhesive de-bond and crack in adherent plate on single lap joint with bi-adhesive

Effect of adhesive de-bond and crack in adherent plate on single lap joint with bi-adhesive

Delamination Strength Comparison of Additively Manufactured Composite Curved Beams Using Continuous Fibers

Progressive failure simulation of angled composite beams subject to flexural loading

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