Author
Libin Zhao
Bio: Libin Zhao is an academic researcher from Beihang University. The author has contributed to research in topics: Composite laminates & Delamination. The author has an hindex of 23, co-authored 69 publications receiving 1410 citations.
Papers
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TL;DR: In this article, a numerical model for accurately predicting the delamination propagation in multidirectional laminates under mode I and mixedmode I/II loadings using the cohesive element is proposed.
154 citations
TL;DR: In this article, the extended finite element method (XFEM) is extended to simulate delamination problems in composite laminates, which accounts for both interlaminar and intralaminar crack propagation.
Abstract: In this paper, the extended finite element method (XFEM) is extended to simulate delamination problems in composite laminates. A crack-leading model is proposed and implemented in the ABAQUS® to discriminate different delamination morphologies, i.e., the 0°/0° interface in unidirectional laminates and the 0°/90° interface in multidirectional laminates, which accounts for both interlaminar and intralaminar crack propagation. Three typical delamination problems were simulated and verified. The results of single delamination in unidirectional laminates under pure mode I, mode II, and mixed mode I/II correspond well with the analytical solutions. The results of multiple delaminations in unidirectional laminates are in good agreement with experimental data. Finally, using a recently proposed test that characterizes the interaction of delamination and matrix cracks in cross-ply laminates, the present numerical results of the delamination migration caused by the coupled failure mechanisms are consistent with experimental observations.
73 citations
TL;DR: In this article, the effect mechanisms of different fasteners on mechanical behaviors of composite bolted joints were analyzed and their mechanical behaviors were characterized. And the results of the combined investigation of experimental and numerical analysis, some useful conclusions have been deduced, which are helpful for the design of composite joints.
67 citations
TL;DR: In this article, the effect of delamination resistance on fatigue crack growth behavior of composite laminates is studied and the strain energy release rate normalized to fatigue delamination resistances (G cf ) is proposed as a controlling parameter to evaluate the fatigue cracks growth rates and thresholds.
66 citations
TL;DR: In this article, an improved criterion is proposed to evaluate the delamination behavior in multidirectional (MD) laminates, which accounts for the deformation induced by fiber bridging.
65 citations
Cited by
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TL;DR: In this paper, an overview of the development of methods for the prediction of fatigue driven delamination growth over the past 40 years is given, and four categories of methods are identified: stress/strain-based models, fracture mechanics based models, cohesive zone models, and models using the extended finite element method.
225 citations
TL;DR: In this article, a numerical model for accurately predicting the delamination propagation in multidirectional laminates under mode I and mixedmode I/II loadings using the cohesive element is proposed.
154 citations
126 citations
Journal Article•
TL;DR: In this paper, the authors investigated comprehensive knowledge regarding joining CFRP and aluminium alloys in available literature in terms of available methods, bonding processing and mechanism and properties. But no model is found to predict the properties of jointed structures, which makes it difficult to select one over another in applications.
114 citations
TL;DR: In this article, a composite double cantilever beam (DCB) specimen is modeled in ABAQUS and delamination propagation is simulated using three numerical methods: Virtual crack closure technique (VCCT), cohesive zone modeling (CZM), and extended finite element method (XFEM).
107 citations