Journal ArticleDOI
Multi-scale failure analysis of plain-woven composites:
TLDR
In this paper, a semi-analytical homogenization method is used to derive effective properties of a plain woven composites from the material properties of the constituents, where the failure of a longitudinal tension and an open hole tension specimens were simulated in a multi-scale manner and verified experimentally.Abstract:
A numerical model capable of dealing with progressive degradation of plain woven composites in a computationally efficient manner is presented in this article. A semi-analytical homogenization method is used to derive effective properties of the composite from the material properties of the constituents. The progressive failure is described using nonlocal continuum damage mechanics where the driving internal variable for the damage is the nonlocal strain. The model was implemented into Abaqus/Explicit, where the failure of a longitudinal tension and an open hole tension specimens were simulated in a multi-scale manner and verified experimentally.read more
Citations
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Numerical study of effective thermal conductivities of plain woven composites by unit cells of different sizes
TL;DR: In this paper, an FEM (Finite Element Method) numerical approach of predicting the effective thermal conductivities of plain woven composites is presented. But the authors do not consider the effect of porosity and fiber volume fraction on the thermal boundary conditions.
Journal ArticleDOI
Predicting the tensile and compressive failure behavior of angle-ply spread tow woven composites
TL;DR: In this paper, a meso-scale finite element model is developed to study the progressive failure behavior of angle-ply spread tow woven composites under tensile and compressive loading conditions.
Journal ArticleDOI
Mechanical and Interfacial Properties Characterisation of Single Carbon Fibres for Composite Applications
Xianbai Ji,Chen Wang,Bernad A. P. Francis,Elvin S. M. Chia,Lianxi Zheng,Jinglei Yang,Sunil C. Joshi,Zhong Chen +7 more
TL;DR: In this article, the mechanical and interfacial properties of single carbon fibres have been experimentally investigated using single filament and impregnated yarn specimens at various gauge lengths ranging from 5 to 200mm.
Journal ArticleDOI
Structural-probabilistic modeling of fatigue failure under elastic-plastic deformation
TL;DR: In this paper, an approximate model of accumulation of micro-defects in a material under repeated loading is proposed, which makes it possible to define theoretical parameters of the fatigue failure (durability, fatigue limit, etc.).
Journal ArticleDOI
Mesh-objective two-scale finite element analysis of damage and failure in ceramic matrix composites
Pascal Meyer,Anthony M. Waas +1 more
TL;DR: In this paper, a mesh-objective two-scale finite element approach for analyzing damage and failure of fiber-reinforced ceramic matrix composites is presented, where the commercial finite element software suite Abaqus is used to generate macroscopic models, e.g., structural-level components or parts of ceramic matrix composite (CMCs), coupled with a second finite element code which pertains to the sub-scale at the fiber-matrix interface level, which is integrated seamlessly using user-generated subroutines and referred to as the integrated finite element method (
References
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Journal ArticleDOI
Nonlocal damage theory
TL;DR: In this paper, the authors proposed a nonlocal damage theory, which is based on the nonlocal treatment of damage from the local treatment of elastic behavior, and the only required modification is to replace the usual local damage energy release rate with its spatial average over the representative volume of the material whose size is a characteristic of a material.
Journal ArticleDOI
Nonlocal integral formulations of plasticity and damage: Survey of progress
Zdenek P. Bazant,Milan Jirásek +1 more
TL;DR: The nonlocal continuum concept has emerged as an effective means for regularizing the boundary value problems with strain softening, capturing the size effects and avoiding spurious localization that gives rise to pathological mesh sensitivity in numerical computations as mentioned in this paper.
Journal ArticleDOI
Nonlocal Continuum Damage, Localization Instability and Convergence
TL;DR: In this paper, a nonlocal damage formulation was extended to a more general form in which the strain remains local while any variable that controls strain-softening is nonlocal, and it was shown that the energy dissipation and damage cannot localize into regions of vanishing volume.
Journal ArticleDOI
A description of micro- and macroscale damage of concrete structures
TL;DR: In this paper, an isotropic elastic damage model is proposed by using the coupling of two damage variables, D t (tensile effects) and D c (compressive effects).
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