Numerical study of mode I fracture toughness of carbon-fibre-reinforced plastic under an impact load

Machado, J.J.M.; Nunes, P.D.P.; Marques, E.A.S.; Campilho, R.D.S.G.; Silva, Lucas F. M. da

doi:10.1177/1464420719871390

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…CZM concepts were also employed by Machado et al [190] for the rate-dependent analysis of adhesives. The linear elastic assumption has also been considered in some studies to numerically study the effect of strain rate [191].…”

Section: Strain Rate Effectsmentioning

confidence: 99%

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

Borges

Akhavan‐Safar

Tsokanas

et al. 2023

Discov Mechanical Engineering

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Adhesive bonding is a constantly developing technique, and the volume of its industrial applications is rapidly increasing, which, in turn, requires improving the compatibility and performance of joining methods in specific applications. The industrial growth of adhesive bonding has also been linked to the broader implementation of composite materials and the increasing number of applications requiring joining dissimilar materials. Compared to traditional joining methods, adhesive bonding does not require local heating of the substrates or introducing holes or notches to them. It is instead a continuous joining method that promotes fewer regions of discontinuities and uniformity of the stress fields. Due to the industrial interest in this method, a substantial effort has been made to expand its range of applications and to provide the design tools that ensure it is a safe, reproducible, reliable, and durable process. The adhesive bonding research field is broad, ranging from adhesive formulation to evaluation of the final bonded structure. The present paper collects the relevant literature and discusses fundamental concepts and recent developments in the adhesive bonding technology, covering three essential topics: adhesive materials, joint designs and joint manufacturing methods, and joint modelling methods. Citing a wealth of relevant review papers, original papers, and book chapters, the paper intends to provide a coherent view of the state of the art, so the reader can identify the opportunities originating from the recent progresses in adhesive bonding.

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Section: Strain Rate Effectsmentioning

confidence: 99%

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

Borges

Akhavan‐Safar

Tsokanas

et al. 2023

Discov Mechanical Engineering

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show abstract

Section: Inter-laminar Damage Modelmentioning

confidence: 99%

“…In the SPR forming process, the rivet needs to pierce the CFRP plate, which inevitably causes CFRP interlaminar damage (delamination) at the connection interface in the area around the rivet. Cohesive behavior is built into ABAQUS/Explicit to simulate delamination, and the model is based on the traction-separation criterion with the following equation 45 : where t n, t s, t t represent the stress components in the normal, first, and second directions, respectively. K n, K s, K t represent the initial stiffness in the three directions, respectively.…”

Section: Numerical Modeling Of Cfrp/al Sprmentioning

confidence: 99%

Study on the forming process and shear mechanical behavior of CFRP/Al self-piercing riveting employed 3D modeling

Kong

Wang

Zhang

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this work, a 3D finite-element model (FEM) was developed to accurately predict the mechanical behavior of CFRP/Al self-piercing riveting (SPR) during the forming and shearing process. A continuous damage model based on the modified Hashin failure criterion was proposed to model the CFRP, and a cohesive model considering the traction-separation criterion was used to capture the delamination between CFRP layers. The simulation results were in good agreement with the experimental results. Based on the developed FEM, the damage of CFRP in the SPR forming process, the shear mechanical properties and damage of joints in the SPR shearing process, the effects of CFRP plate thickness and rivet length on the SPR forming cross-section and shear strength were investigated. The results showed that, the maximum interlock value of 0.46 mm was obtained when the rivet length was 6.5 mm and the CFRP plate thickness was 1.6 mm. The maximum shear peak load of 3611.98 N was obtained when the rivet length was 6.5 mm and the CFRP plate thickness was 2.2 mm. The interaction between rivet length and CFRP plate thickness should be considered in the actual SPR connection.

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“…On the other hand, the production of such complicated loading systems may have some practical challenges, and therefore, many researchers prefer to do their experiments by simple conventional systems. 1,14–16…”

Section: Introductionmentioning

confidence: 99%

Investigating the effects of loading system on the fracture behavior of DCB specimens considering T-stress

Aalami

Chakherlou

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Double cantilever beam specimen is a standard specimen for assessment of mode I failure and separation in adhesively bonded joints and also composite materials. Among the several load introduction systems, the piano hinges and end loading blocks are more common. It has been accepted that the fracture toughness results of the two cases are different, but the effect of the loading system on the load-displacement data and fracture mechanisms is not entirely known yet. Therefore, in this study, the two loading concepts are compared both by precise finite element simulations and experimental tests. The adhesive layer is modeled with its own material properties, and the failure of adhesive is investigated by known LEFM procedures. The results reveal that the load block makes the double cantilever beam specimen stiffer and exhibit more non-linear behavior. Moreover, double cantilever beam with the load block system fails in higher loads and lower crack opening displacements compared with the same specimen loaded by the hinges. To study the effect of loading arrangement in more details and including the softening phase, cohesive zone model was utilized. A correction for strain energy release rate based on the parameter T was proposed, and the role of the T-stress on the traction-separation law of the cohesive zone model and the load-displacement behavior were investigated. It was concluded that the T-stress as a crack tip constraint parameter can successfully justify the difference between the two cases. Applying the correction to the traction-separation law of CZM proves the validity of proposed correction in justifying the experimental results.

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Numerical study of mode I fracture toughness of carbon-fibre-reinforced plastic under an impact load

Cited by 3 publications

References 27 publications

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

Study on the forming process and shear mechanical behavior of CFRP/Al self-piercing riveting employed 3D modeling

Investigating the effects of loading system on the fracture behavior of DCB specimens considering T-stress

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