Cohesive Zone Model Identification With DCB Test Parameter Estimation Sensitivity

Ly, Racine; Jumel, Julien; Shanahan, Martin; Lavelle, Florian

doi:10.7712/100016.2064.9066

Cited by 1 publication

(3 citation statements)

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“…Thus, a proper choice of mesh size is necessary to obtain accurate FEM results. Several papers (Abdel Wahab 2015;Ly et al 2016;Panettieri et al 2016) pointed out this aspect and provide a guideline on how to overcome this issue. Authors such as Panettieri et al (Panettieri et al 2016) and Manikandam et al (Manikandan and Chai 2018) give specific formulas for estimating the cohesive zone length; these approximations influenced the mesh density used in the present paper.…”

Section: Fem Using Cohesive Elementsmentioning

confidence: 99%

“…Furthermore, the Cohesive Zone Model (CZM) is used to approach the DCB test simulation using the FEM. The cohesive zone can be applied to modelling the fracture process in this research, the delamination process occurring in the interlaminar section (''Aerospace Aluminum Distributor Supplier'' 2021; Ly et al 2016). A cohesive law characterizes the phenomena in the cohesive zone in terms of the traction and the separation of the surfaces during the fracture process.…”

Section: Introductionmentioning

confidence: 99%

“…An integral part of CZM is the parameters of crack initiation and propagation (Abdel Wahab 2015). Moreover, it allows us to determine the cohesive stresses along the crack propagation path (Ly et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Determination of fracture energy (mode I) in the inverse fiber metal laminates using experimental–numerical approach

et al. 2021

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Fiber metal laminates (FML) are hybrid materials consisting of metal and composite layers. They have great mechanical and fatigue properties. However, interface between metal and composite layers can be critical for their final properties. In this paper, process of determination of some fracture parameters of this interface in unusual FML material is described. Experimental tests following ASTM norm were conducted using Double Cantilever Beam (DCB). However, due to asymmetry, fracture energy cannot be obtained directly from the force–displacement curve. Finite element method simulations were carried out using cohesive elements and cohesive surfaces approach. The cohesive behavior of interface layers were modelled using traction separation law. Key properties of this law were obtained—maximal traction and fracture energy. In this particular case cohesive approach was better in reflecting experimental results. Determined values can be used in later research tasks (like modelling big structures containing this material) as material properties. The presented approach can be used successfully to obtain fracture energy in cases of materials for which standard approach is insufficient.

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