Failure behaviour of the adhesive layer and angle ply composite adherends in single lap joints: A numerical study

Demiral, Murat; Kadıoğlu, Ferhat

doi:10.1016/j.ijadhadh.2018.10.010

Cited by 33 publications

(9 citation statements)

References 18 publications

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“…[31] presented that for the L/h ratio greater than Table 4. Interface properties of glass-fibre-reinforced composite used in numerical analyses [21,24]. σ /2 13 u σ ); hence, the flexural failure modes were mainly active.…”

Section: Resultsmentioning

confidence: 99%

Size effect in flexural behaviour of unidirectional GFRP composites

2020

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In this paper, the size effect in unidirectional (UD) laminated glass-fibre reinforced plastic (GFRP) composites subjected to quasi-static bending loading was investigated: the sensitivity of a specimen's mechanical behaviour and failure mechanism to its geometry was studied. Composite beams with different numbers of 0° unidirectional plies were tested and their post-deformation structures were analysed microscopically. In the subsequent simulations, the intraply damage was modelled using continuum damage mechanics, implemented as a user-defined VUMAT subroutine in ABAQUS/Explicit, while cohesive zone elements were employed to characterize the delamination between different plies. It was observed that the flexural failure triggered the multiple delaminations; their location was studied. The influence of the size effect on the bending response of the UD composite beams was analysed in depth. The findings of the current study can be used to design modern structures made of composite materials.

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Section: Resultsmentioning

confidence: 99%

Size effect in flexural behaviour of unidirectional GFRP composites

2020

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“…The B-K law is always used in aviation epoxy adhesives. G equivC of the B-K law is shown in equation 2 [20]. If G equivC is greater than 1.0, the adhesive fails.…”

Section: Load-displacement Curvesmentioning

confidence: 99%

An investigation of the stitching effect on single lap shear joints in laminated composites

Wang

Geng

Chen

et al. 2019

Science and Engineering of Composite Materials

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This paper aimed to investigate the stitching effect on the bond strength of single lap shear joints in carbon/epoxy composite laminates using experimental and simulation methods. Stitched and unstitched single lap shear joints were bonded using the EC-3448 epoxy adhesive and tested under different working environments, including room temperature/dry (RTD), elevated temperature/wet (ETW) and cold temperature/dry (CTD). The results showed that stitching improved the bond strength of the stitched single lap joints, with approximately 60% higher strength for stitched compared to unstitched lap joints under RTD and CTD environments and 10% higher strength under an ETW environment. The increase was smaller under ETW conditions because the adhesive recured under elevated temperature. Embedded interactions connected the lapping plates and the stitch line, and the maximum stress failure criterion was adopted for the stitch line. As the predicted failure modes are consistent with the experimental results, the progressive damage mode can be applied to simulate stitched composite structures.

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“…With the explicit time-integration, one can simulate short time physical processes with a very small time increment. A typical example of using explicit method is the lap-joint failure, including the failure of the composite itself as well as the adhesive [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Failure Analysis of Adhesive Joint of Glass Fiber Reinforced Polymer Composite

Takács

Szabó

2019

Period. Polytech. Mech. Eng.

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The adhesive joint is the most widely used joining technique of thermoset composite structures. Analysis of the failure of adhesive joints of composite structures has a high importance due to its significance in industrial applications such as automobile or autobus bodies. In this paper we performed experimental and numerical analysis of a glass fiber reinforced, vinyl-ester matrix composite bonded with a methacrylate adhesive. The critical energy release rate in normal loading direction obtained from standard double cantilever beam test is used as input data in finite element simulations, in which the failure process is modeled by using cohesive zone material. Results of interface elements with exponential and standard contact elements with bilinear cohesive behavior are compared. The use of interface elements is numerically robust, convergence is reached faster, but identical mesh between the parts is needed. It can be a good alternative when simulating sub-models. When using standard contact elements, the robustness needs contact stabilization, however this method does not need identical mesh and it also allows the use of shell elements, therefore it can be used on a full-structure scale with high efficiency.

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Failure behaviour of the adhesive layer and angle ply composite adherends in single lap joints: A numerical study

Cited by 33 publications

References 18 publications

Size effect in flexural behaviour of unidirectional GFRP composites

Size effect in flexural behaviour of unidirectional GFRP composites

An investigation of the stitching effect on single lap shear joints in laminated composites

Experimental and Numerical Failure Analysis of Adhesive Joint of Glass Fiber Reinforced Polymer Composite

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