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B.Y. Chen

Bio: B.Y. Chen is an academic researcher from Delft University of Technology. The author has contributed to research in topics: Delamination & Composite laminates. The author has an hindex of 16, co-authored 36 publications receiving 911 citations. Previous affiliations of B.Y. Chen include Imperial College London & National University of Singapore.

Papers
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Journal ArticleDOI
TL;DR: The proposed floating node method is particularly suited for modelling weak and cohesive discontinuities and for the representation of complex crack networks and can model multiple plies and interfaces of a composite laminate, and both matrix crack and delamination, within a user-defined element.

152 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a model to predict the strength and damage progression of open-hole composite laminates under compressive loading (OHC) and applied it to study the size effects of OHC.

138 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented a computational study of the tensile strength prediction of open-hole laminates using a cohesive zone model and found that neglecting delamination in the numerical models will lead to mesh-dependency and over-estimation on the predicted strength.
Abstract: The tensile strength of open-hole fibre reinforced composite laminates depends on in-plane, thickness and ply lay-up scaling. Translaminar (fibre direction) mode I fracture toughness has recently been experimentally determined to be thickness dependent. This paper presents a computational study of the tensile strength prediction of open-hole laminates using a cohesive zone model. To the authors’ knowledge, it is for the first time in the literature that the thickness-dependence of translaminar fracture toughness is accounted for in the numerical modelling of composites. The thickness size effect in the strength of open-hole composite laminates failed by pull-out is accurately predicted for the first time by a deterministic model. It is found that neglecting delamination in the numerical models will lead to mesh-dependency and over-estimation on the predicted strength. Smeared crack model with cohesive elements to model delamination is able to predict the correct failure mode; but it is found not suitable for accurate strength predictions for laminates failed by delamination.

127 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed a progressive failure model for orthotropic composite laminates, employing stepwise discretization of the traction-separation relationship, to predict the effect of specimen size and laminate orthotropy on the OHT strength.
Abstract: The emergence of advanced computational methods and theoretical models for damage progression in composites has heralded the promise of virtual testing of composite structures with orthotropic lay-ups, complex geometries and multiple material systems. Recent studies have revealed that specimen size and material orthotropy has a major effect on the open hole tension (OHT) strength of composite laminates. The aim of this investigation is develop a progressive failure model for orthotropic composite laminates, employing stepwise discretization of the traction–separation relationship, to predict the effect of specimen size and laminate orthotropy on the OHT strength. The results show that a significant interaction exists between delamination and in-plane damage, so that models without considering delamination would over-predict strength. Furthermore, it is found that the increase in fracture toughness of blocked plies must be incorporated in the model to achieve good correlation with experimental results.

114 citations

Journal ArticleDOI
TL;DR: In this article, an enriched ply element is developed, such that a matrix crack can be modelled explicitly within its domain, and an enriched cohesive element was developed to incorporate the boundaries of matrix cracks on the interface.

84 citations


Cited by
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03 Oct 2012
TL;DR: A variational free-discontinuity formulation of brittle fracture was given by Francfort and Marigo as discussed by the authors, where the total energy is minimized with respect to the crackgeometry and the displacement field simultaneously.
Abstract: A variational free-discontinuity formulation of brittle fracture was given by Francfortand Marigo [1], where the total energy is minimized with respect to the crackgeometry and the displacement field simultaneously. The entire evolution of cracksincluding their initiation and branching is determined by this minimization principlerequiring no further criterion. However, a direct numerical discretization of themodel faces considerable difficulties as the displacement field is discontinuous inthe presence of cracks.

313 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a model to predict the strength and damage progression of open-hole composite laminates under compressive loading (OHC) and applied it to study the size effects of OHC.

138 citations

Journal ArticleDOI
TL;DR: In this article, the authors review the recent advances in nondestructive testing and evaluation (NDT&E) as applied to the inspection of thick composite parts and sandwich structures and determine possible research prospects to address the limitations of current technologies.

126 citations