Failure load analysis of C-shaped composite beams using a cohesive zone model

Truong, Viet-Hoai; Nguyen, Khanh-Hung; Park, Sang-Seon; Kweon, Jin‐Hwe

doi:10.1016/j.compstruct.2017.10.035

Cited by 23 publications

(4 citation statements)

References 26 publications

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“…The COH3D8 element format was adopted for the cohesive elements. The bilinear shape law was generally used owing to the analysis time and convergence problem [21][22][23].…”

Section: Eer Review 10 Of 21mentioning

confidence: 99%

Failure-Mode Shift of Metal/Composite L-Joint with Grooved Structure under Compressive Load

Kang

Lei

et al. 2022

Polymers

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Bond length and bond interface morphology have a great influence on the performance of metal/composite hybrid joints. In this paper, a metal/composite L-joint with groove structure was designed, and seven groups with different bonding lengths were fabricated using the VARI (Vacuum Assisted Resin Infusion) process to study the effect of different bonding lengths on the performance of the joint. In the simulation analysis of the metal/composite L-joint, the stiffness equivalence method was adopted, and the groove structure was equivalent to a 0-thickness element layer. The applicability of the simulation method was verified by comparing the ultimate load, displacement and failure mode of the test and simulation. Furthermore, the simulation method was used to simulate more compression experiments of metal/composite L-joints with different bonding lengths, and prediction diagrams of failure displacement and failure mode were produced. According to the prediction map, when the bonding length is 100.00 mm, the metal/composite L-joint has better compressive properties.

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“…The COH3D8 element format was adopted for the cohesive elements. The bilinear shape law was generally used owing to the analysis time and convergence problem [21][22][23].…”

Section: Eer Review 10 Of 21mentioning

confidence: 99%

Failure-Mode Shift of Metal/Composite L-Joint with Grooved Structure under Compressive Load

Kang

Lei

et al. 2022

Polymers

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“…5 Avalon et al 6 stated that critical radial stresses are not altered by the radius, thickness, or carbon nanofibers that influence curved beam resistance and composite laminate failure. Truong et al and Gozluklu et al 7,8 used cohesive zone model-based finite element modeling to study the delamination failure of curved composite beams under opening loads parallel to or perpendicular to one arm. Raju utilized 3D finite element analysis to study the stress distribution, delamination location, initiation, and damage propagation of curved glass fiberreinforced polymer under compressive load.…”

Section: Introductionmentioning

confidence: 99%

The effect of adhesively bonded external hybrid patches on the residual strength of repaired glass/epoxy‐curved laminates

Venkatesan,

Vellayaraj

2023

Polymer Composites

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Composite materials are increasingly used in aircraft structural components with complex structures like L, C, or T shapes, which can cause delamination failure in the thickness direction under complex loading. This research focuses on the experimental investigation of the effect of different adhesive reinforcement phases with an adhesively bonded external patch to examine the residual strength and delamination resistance of repaired glass/epoxy curved samples. The damaged region in curved samples was repaired using adhesive reinforcement phases like neat epoxy, chopped glass fiber, and particulate glass fiber, along with adhesively bonded external patches like hybrid patches of glass/Kevlar (HP G/K), glass/carbon (HP G/C), and intraply patch carbon/Kevlar (IP C/K). The findings show that chopped glass fiber HP G/C patch‐repaired curved samples had a curved beam strength (CBS) and interlaminar tensile strength (ILTS) recovery of 222.87% and 149.54%, respectively, as compared to damage area removed samples. In addition, it exhibited higher peak force, residual strength, and less elongation when compared to HP G/K and IP C/K patch‐repaired curved samples. According to the findings of this research, composite angle brackets in aircraft structural components can be repaired utilizing an adhesively bonded HP G/C patch filled with chopped glass fiber at the dressed site.Highlights The effect of patch hybridization on repaired curved laminates was studied. Four‐point bending test was conducted on indented and repaired samples. Residual strength and delamination behavior were studied. Chopped glass fiber HP G/C patch repaired samples had higher CBS and ILTS. Delamination onset and propagation were assessed using Photographic images.

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“…Cohesive zone model (CZM), an effective and favored crack model in interface fracture mechanics, has been widely used to simulate crack initiation and propagation in various materials, such as metals [4][5][6], polymers [7], ceramics [8], concrete [9][10][11], and fiber-reinforced Cohesive zone model (CZM), an effective and favored crack model in interface fracture mechanics, has been widely used to simulate crack initiation and propagation in various materials, such as metals [4][5][6], polymers [7], ceramics [8], concrete [9][10][11], and fiberreinforced composites [12]. In CZM, material failure is characterized by a traction-separation law, which relates the traction across the crack to the corresponding separation [13].…”

Section: Introductionmentioning

confidence: 99%

An Improved Cohesive Zone Model for Interface Mixed-Mode Fractures of Railway Slab Tracks

et al. 2021

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The interface crack of a slab track is a fracture of mixed-mode that experiences a complex loading–unloading–reloading process. A reasonable simulation of the interaction between the layers of slab tracks is the key to studying the interface crack. However, the existing models of interface disease of slab track have problems, such as the stress oscillation of the crack tip and self-repairing, which do not simulate the mixed mode of interface cracks accurately. Aiming at these shortcomings, we propose an improved cohesive zone model combined with an unloading/reloading relationship based on the original Park–Paulino–Roesler (PPR) model in this paper. It is shown that the improved model guaranteed the consistency of the cohesive constitutive model and described the mixed-mode fracture better. This conclusion is based on the assessment of work-of-separation and the simulation of the mixed-mode bending test. Through the test of loading, unloading, and reloading, we observed that the improved unloading/reloading relationship effectively eliminated the issue of self-repairing and preserved all essential features. The proposed model provides a tool for the study of interface cracking mechanism of ballastless tracks and theoretical guidance for the monitoring, maintenance, and repair of layer defects, such as interfacial cracks and slab arches.

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Failure load analysis of C-shaped composite beams using a cohesive zone model

Cited by 23 publications

References 26 publications

Failure-Mode Shift of Metal/Composite L-Joint with Grooved Structure under Compressive Load

Failure-Mode Shift of Metal/Composite L-Joint with Grooved Structure under Compressive Load

The effect of adhesively bonded external hybrid patches on the residual strength of repaired glass/epoxy‐curved laminates

An Improved Cohesive Zone Model for Interface Mixed-Mode Fractures of Railway Slab Tracks

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