Three-dimensional cohesive fracture modeling of non-planar crack growth using adaptive FE technique

Khoei, A.R.; Moslemi, Hamid; Sharifi, Mahdi

doi:10.1016/j.ijsolstr.2012.04.036

Cited by 23 publications

(8 citation statements)

References 38 publications

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“…Prior to matrix cracking, both ply elements are intact and the floating nodes are not included in the calculations. Only the real nodes (1~8) are used to form the interface CE and the derivation of stiffness matrix of the CE is given as follows [35].…”

Section: Before Matrix Crackingmentioning

confidence: 99%

A separable cohesive element for modelling coupled failure in laminated composite materials

Lü

Chen

Tan

et al. 2018

Composites Part A: Applied Science and Manufacturing

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A three-dimensional separable cohesive element (SCE) is proposed to enable the modelling of interaction between matrix cracking and interfacial delamination in laminated fibre-reinforced composite materials. It is demonstrated that traditional cohesive elements are incapable of modelling the coupled failure mechanisms accurately if partitioning is not allowed. The SCE may be partitioned according to the configuration and geometry of matrix cracks in adjacent plies, thus maintaining appropriate connection between plies. Physically, the original interface is split and new interfaces are formed to bond the homologous cracked solids during fracturing process. The stress concentration induced by matrix cracks and the load transfer from cracked solid elements to interface cohesive element are effectively modelled. A comprehensive set of cases of multiple matrix crack configurations from plies of different fiber angles is considered. The proposed SCE is applied to model progressive failure in composite laminates and the results are found to agree with experiments.

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Section: Before Matrix Crackingmentioning

confidence: 99%

A separable cohesive element for modelling coupled failure in laminated composite materials

Lü

Chen

Tan

et al. 2018

Composites Part A: Applied Science and Manufacturing

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“…Moslemi and Tavakkoli [28] could develop a static approach for error estimation in AFEM. Khoei et al [29] modeled cohesive crack propagation using AFEM and advanced this issue [30] by modeling of non-planar cohesive fracture crack growth via AFEM. Also, Moslemi and Khoei [31] employed AFEM for modeling of damage growth and crack initiation.…”

Section: Adaptive Finite Element Methodsmentioning

confidence: 99%

A New Nodal Stress Recovery Technique in Finite Element Method Using Colliding Bodies Optimization Algorithm

Kaveh

Seddighian

2019

Period. Polytech. Civil Eng.

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In Finite Element Method (FEM), the stress components are calculated within the elements firstly, and then these components are recovered to the nodes. For the recovery process, there are several well-known methods in which the increase of their accuracy imposes additional costs into the problem. In this paper, a new nodal stress recovery technique is proposed in which Colliding Bodies Optimization (CBO) Algorithm fits an appropriative function for nodal stress fields. The CBO employs this function to compute the stress components in the nodal coordinates. Therefore, a particular model to stress fields and its components will be available. It can be considered as a connection between analytical approaches and numerical methods, providing benefits of both categories. Finally, the accuracy, efficiency, and applicability of the new technique are investigated employing three diverse examples.

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“…The constitutive law can be de ned between the cohesive traction t j and crack separation i using t j = t( i ) or _ t j = T ji _ i , where T ji is the constitutive tangent sti ness tensor of cohesive fracture [29,30]. In this study, the delamination model proposed by Turon et al [31] is utilized based on the continuum damage model.…”

Section: Cohesive Fracture Model For Frp Interfacementioning

confidence: 99%

A computational plastic–damage method for modeling the FRP strengthening of concrete arches

Ahmadpour¹,

Tehrani

Khoei

2019

Scientia Iranica

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In this paper, a computational technique is presented based on a concrete plastic-damage model to investigate the e ect of FRP strengthening of reinforced concrete arches. A plastic-damage model was utilized to capture the behavior of concrete. The interface between the FRP and concrete was modeled using a cohesive fracture model. In order to validate the accuracy of the damage-plastic model, a single element was employed under monotonic tension, monotonic compression, and cyclic tension loads. An excellent agreement was observed between the prede ned strain-stress curve and that obtained by the numerical model. Furthermore, the accuracy of the cohesive fracture model was investigated by comparing the numerical results with those of experimental data. Finally, in order to verify the accuracy of the proposed computational algorithm, the results were compared with the experimental data obtained through two tests conducted on reinforced concrete arches strengthened with FRP.

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Three-dimensional cohesive fracture modeling of non-planar crack growth using adaptive FE technique

Cited by 23 publications

References 38 publications

A separable cohesive element for modelling coupled failure in laminated composite materials

A separable cohesive element for modelling coupled failure in laminated composite materials

A New Nodal Stress Recovery Technique in Finite Element Method Using Colliding Bodies Optimization Algorithm

A computational plastic–damage method for modeling the FRP strengthening of concrete arches

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