Predictions of J integral and tensile strength of clay/epoxy nanocomposites material using phase field model
- Authors
- Msekh, Mohammed A.; Silani, M.; Jamshidian, M.; Areias, P.; Zhuang, X.; Zi, G.; He, P.; Rabczuk, Timon
- Issue Date
- 15-5월-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Polymer-matrix composites (PMCs); Fracture; Interface/interphase; Computational modelling; Finite element analysis (FEA)
- Citation
- COMPOSITES PART B-ENGINEERING, v.93, pp.97 - 114
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES PART B-ENGINEERING
- Volume
- 93
- Start Page
- 97
- End Page
- 114
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/88645
- DOI
- 10.1016/j.compositesb.2016.02.022
- ISSN
- 1359-8368
- Abstract
- We predict macroscopic fracture related material parameters of fully exfoliated clay/epoxy nano-composites based on their fine scale features. Fracture is modeled by a phase field approach which is implemented as user subroutines UEL and UMAT in the commercial finite element software Abaqus. The phase field model replaces the sharp discontinuities with a scalar damage field representing the diffuse crack topology through controlling the amount of diffusion by a regularization parameter. Two different constitutive models for the matrix and the clay platelets are used; the nonlinear coupled system consisting of the equilibrium equation and a diffusion-type equation governing the phase field evolution are solved via a Newton-Raphson approach. In order to predict the tensile strength and fracture toughness of the clay/epoxy composites we evaluated the J integral for different specimens with varying cracks. The effect of different geometry and material parameters, such as the clay weight ratio (wt%) and the aspect ratio of clay platelets are studied. (C) 2016 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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