Finite Element Simulation of Delamination in Carbon Fiber/Epoxy Laminate Using Cohesive Zone Model: Effect of Meshing Variation

Abstract

Delamination or interlaminar fracture often occurs in composite laminate due to several factors such as high interlaminar stress, stress concentration, impact stress as well as imperfections in manufacturing processes. In this study, finite element (FE) simulation of mode I delamination in double cantilever beam (DCB) specimen of carbon fiber/epoxy laminate HTA/6376C is investigated using cohesive zone model (CZM). 3D geometry of DCB specimen is developed in ANSYS Mechanical software and 8-node interface elements with bi-linear formulation are employed to connect the upper and lower parts of DCB. Effect of variation of number of elements on the laminate critical force is particularly examined. The mesh variation includes coarse, fine, and finest mesh. Simulation results show that the finest mesh needs to be employed to produce an accurate assessment of laminate critical force, which is compared with the one obtained from exact solution. This study hence addresses suitable number of elements as a reference to be used for 3D simulation of delamination progress in the composite laminate, which is less explored in existing studies of delamination of composites so far.

A Semi-Empirical Damage Evaluation Criterion for Thin Composite Impact Analysis

“…The first option is in principle the most accurate, as able to describe the adhesive behavior and the delamination mechanism to the fullest. On the other hand, given the thin geometry of these laminates, mesh sizes required to get acceptable results need to be small [7], leading to high computational costs even for simple models. Furthermore, notable obstacles lie in the identification of the key parameters for the adhesives: comprehensive DCB (Double Cantilever Beam), ENF (End Notched Flexure) and MMB (Mixed Mode Bending) test campaigns to characterize the adhesive interface are needed, as the properties depend on both bonding and bonded material [8].…”

Solutions of Hypergeometric ODE with b Equal to c for Any x

“…Engineering problems such as those encountered in the fields of electrical circuits 12) , resonance 13) , matrix 14) , forensic sciences 15) , chemistry 16) , risk analysis in generator 17) , sampling application 18) , Design optimization of Francis turbine 19) , delamination of composite 20) , thermal analysis of heat sink 21) , and stochastic computing 22) can be solved using a hypergeometric differential equation, whose solution is a hypergeometric function. A hypergeometric ODE is solved using the Frobenius Methods since its coefficients in the ODE standard form are not analytic.…”

Finite Element Analysis for Design of Plate for Fractured Femur

“…Hence, it is necessary to do simulation tasks in order to support the inquiry for optimum design for the fixation plate. To this end, numerical simulation has been proven to be a reliable approach in design and optimization tasks (Kaman et al, 2014;Hidayat et al, 2017), in particular finite element (FE) method (Syahroni and Hidayat, 2011;Maharaj et al, 2013;Waas et al, 2019).…”