Comparison of Two Approaches to Model Cure-Induced Microcracking in Three-Dimensional Woven Composites

2012 ◽  
Author(s):  
Igor Tsukrov ◽  
Michael Giovinazzo ◽  
Kateryna Vyshenska ◽  
Harun Bayraktar ◽  
Jon Goering ◽  
...  
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Woven Composites ◽  
Finite Element Models ◽  
The Matrix ◽  
3D Woven Composites ◽  
The Difference ◽  
Resin Curing

Finite element models of 3D woven composites are developed to predict possible microcracking of the matrix during curing. A specific ply-to-ply weave architecture for carbon fiber reinforced epoxy is chosen as a benchmark case. Two approaches to defining the geometry of reinforcement are considered. One is based on the nominal description of composite, and the second involves fabric mechanics simulations. Finite element models utilizing these approaches are used to calculate the overall elastic properties of the composite, and predict residual stresses due to resin curing. It is shown that for the same volume fraction of reinforcement, the difference in the predicted overall in-plane stiffness is on the order of 10%. Numerical model utilizing the fabric mechanics simulations predicts lower level of residual stresses due to curing, as compared to nominal geometry models.

Modeling of Cure-Induced Residual Stresses in 3D Woven Composites of Different Reinforcement Architectures

2013 ◽  
Vol 577-578 ◽  
pp. 253-256 ◽  
Author(s):  
Igor Tsukrov ◽  
Borys Drach ◽  
Harun Bayraktar ◽  
Jon Goering
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Finite Element Modeling ◽  
Room Temperature ◽  
Woven Composites ◽  
Element Modeling ◽  
The Matrix ◽  
3D Woven Composites ◽  
Resin Curing

This paper presents finite element modeling effort to predict possible microcracking of the matrix in 3D woven composites during curing. Three different reinforcement architectures are considered: a ply-to-ply weave, a one-by-one and a two-by-two orthogonal through-thickness reinforcement. To realistically reproduce the as-woven geometry of the fabric, the data from the Digital Fabric Mechanics Analyzer software is used as input for finite element modeling. The curing processed is modeled in a simplified way as a uniform drop in temperature from the resin curing to room temperature. The simulations show that the amount of residual stress is strongly influenced by the presence of through-thickness reinforcement.

Improvement of an Ellipsoidal Void Model for Simulating Ductile Fracture Behavior

2013 ◽  
Vol 577-578 ◽  
pp. 93-96
Author(s):  
Kazutake Komori
Keyword(s):  
Finite Element ◽  
Ductile Fracture ◽  
Fracture Behavior ◽  
Fracture Strain ◽  
Volume Fraction ◽  
Deformation Gradient ◽  
Simple Relationship ◽  
The Matrix ◽  
The Difference ◽  
Deformation Gradients

An ellipsoidal void model for simulating ductile fracture behavior was proposed by the author [K. Komori: Mech. Mater., Vol. 60 (2013), p. 36]. The nominal fracture strain calculated from this model is slightly larger than that calculated from the finite-element void cell when the initial void volume fraction is specified. To decrease the difference, an assumption must be made that the deformation gradient of the void does not coincide with that of the matrix. This study proposes a simple relationship between the two deformation gradients that produces agreement between the nominal fracture strain calculated using the ellipsoidal void model and that using the finite-element void cell.

Evaluation of the Effects of Inclusion Distribution on the Local Ductility of DP Steel

2012 ◽  
Vol 706-709 ◽  
pp. 1527-1532 ◽  
Author(s):  
Y. Suwa ◽  
T. Matsuno ◽  
S. Hirose ◽  
N. Fujita ◽  
A. Seto
Keyword(s):  
Finite Element ◽  
Damage Mechanics ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Continuum Damage Mechanics ◽  
Continuum Damage ◽  
Element Analysis ◽  
Dp Steel ◽  
The Difference ◽  
Inclusion Distribution

In the present study, the effects of inclusions on the local ductility of DP steel are investigated using finite element analysis (FEA). In order to evaluate local ductility, a continuum damage mechanics (CDM) model has been incorporated into the Abaqus/Explicit® commercial finite element code. Furthermore, three-dimensional representative volume elements (RVEs) with ferrite, martensite, and inclusion phases have been used to evaluate the stress-strain response. Simulation results show that the volume fraction of the martensite as well as the difference in hardness between the ferrite and the martensite phases dominates the effect of inclusions on local ductility.

scholarly journals Effect of Residual Stresses on the Stress Intensity Factor of Cracks in a Metal Matrix Composite: Numerical Analysis

2020 ◽  
Vol 22 (1) ◽  
pp. 119-132
Author(s):  
S. Ramdoum ◽  
F. Bouafia ◽  
B. Serier ◽  
H. Fekirini
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Numerical Model ◽  
Residual Stresses ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Three Dimensional ◽  
Internal Stresses ◽  
The Matrix

AbstractIn this work, the finite element method was used to determine the stress intensity factors as a function of crack propagation in metal matrix composite structure, A three-dimensional numerical model was developed to analyze the effect of the residual stresses induced in the fiber and in the matrix during cooling from the elaboration temperature at room temperature on the behavior out of the composite. Added to commissioning constraints, these internal stresses can lead to interfacial decohesion (debonding) or damage the matrix. This study falls within this context and allows cracks behavioral analysis initiated in a metal matrix composite reinforced by unidirectional fibers in ceramic. To do this, a three-dimensional numerical model was analyzed by method of finite element (FEM). This analysis is made according to several parameters such as the size of the cracking defects, its propagation, its interaction with the interface, the volume fraction of the fibers (the fiber-fiber interdistance), orientation of the crack and the temperature.

Bending Property of Honeycombed 3D Woven Composites with Quadrilateral Cross Section

2020 ◽  
Vol 7 (2) ◽  
pp. 7-12
Author(s):  
Lihua Lyu ◽  
Liming Zhu ◽  
Jingrui Cui ◽  
Jing Guo ◽  
Fang Ye
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Cross Section ◽  
Three Dimensional ◽  
Honeycomb Structure ◽  
Woven Composites ◽  
Molding Process ◽  
Element Simulation ◽  
Bending Load ◽  
3D Woven Composites

The delamination resistance and damage tolerance of traditional honeycomb composites are poor. To overcome these defects, 3D (three-dimensional) integrated woven composites of honeycomb structure were designed, and then manufactured using the vacuum assisted resin transfer molding process (VARTM), based on the 3D self-prepared fabrics used as reinforcements. The load-displacement curves, maximum bending load-velocity curves, and bar chart of energy absorption were determined experimentally and calculated by finite element simulation. The results showed good agreement between experimental and finite element simulation data. The correctness of the model was verified, so the model can be used to predict the mechanical properties of 3D integrated woven composites of honeycomb structure with quadrilateral cross section.

Tensile properties of defect-prefabricated 3D woven composites: Experiments and simulations

2021 ◽  
pp. 152808372110395
Author(s):  
Liming Xu ◽  
Deng’an Cai ◽  
Chao Li ◽  
Xingyu Jin ◽  
Guangming Zhou
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Research Work ◽  
Three Dimensional ◽  
Woven Composites ◽  
Structural Components ◽  
Damage Models ◽  
3D Woven Composites ◽  
Near Net Shape ◽  
Von Mises

Three-dimensional (3D) woven composites have been widely used in structural components due to their excellent mechanical and near-net-shape properties. However, for some special applications, it is expected that 3D woven composites can be damaged at designated locations under a specific load. In this research work, a new kind of defect-prefabricated 3D woven composites (DP3DWCs) are designed, where defects are prefabricated by cutting weft or warp yarns in defect-free 3D woven composites (DF3DWCs). The tensile mechanical properties of the DF3DWCs and the DP3DWCs are investigated experimentally and numerically. The mesoscopic geometry models of the DF3DWCs and the DP3DWCs were established by multi-objective searching algorithm. The progressive damage models were established using the 3D Hashin criteria and the von Mises failure criterion. Numerical results agree well with the experimental data. The influence of the number of defect layers on the mechanical properties was also discussed. The obtained results indicate that the defects have little effect on the elastic modulus, while tensile strengths decrease linearly with the increase of the number of defect layers. Failure mechanisms of yarns and matrix in the non-defective and defective materials were studied, and the volume fraction of elements of each failure mode was computed and analysed.

On the Understanding of Tensile Elastic and Strength Properties of Integrally Woven 3D Carbon Composites

2002 ◽  
Author(s):  
Larry C. Dickinson ◽  
Alexander E. Bogdanovich
Keyword(s):  
Three Dimensional ◽  
Theoretical Work ◽  
Strength Properties ◽  
Textile Composites ◽  
Woven Composites ◽  
Carbon Composites ◽  
Significant Difference ◽  
3D Woven Composites ◽  
The Difference ◽  
3D Orthogonal Woven

There is significant literature reporting research on three-dimensional (3D) textile composites. Previous experimental and theoretical work has shown that small details of design and structure of 3D woven composites have a significant effect on strength and failure mechanisms. This work presents the results of an experimental study examining the effect of thickness (number of warp layers) on tensile behavior of 3D orthogonal woven carbon/epoxy composites. Three different preform designs resulting in three different thicknesses were examined. There is a significant difference between warp (x) and fill (y) tensile properties strength, and the difference is a function of thickness.

scholarly journals Predictive Computational Model for Damage Behavior of Metal-Matrix Composites Emphasizing the Effect of Particle Size and Volume Fraction

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2143
Author(s):  
Shaimaa I. Gad ◽  
Mohamed A. Attia ◽  
Mohamed A. Hassan ◽  
Ahmed G. El-Shafei
Keyword(s):  
Finite Element ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Volume Fraction ◽  
Particulate Composites ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Zone Method ◽  
Stress Strain ◽  
The Matrix

In this paper, an integrated numerical model is proposed to investigate the effects of particulate size and volume fraction on the deformation, damage, and failure behaviors of particulate-reinforced metal matrix composites (PRMMCs). In the framework of a random microstructure-based finite element modelling, the plastic deformation and ductile cracking of the matrix are, respectively, modelled using Johnson–Cook constitutive relation and Johnson–Cook ductile fracture model. The matrix-particle interface decohesion is simulated by employing the surface-based-cohesive zone method, while the particulate fracture is manipulated by the elastic–brittle cracking model, in which the damage evolution criterion depends on the fracture energy cracking criterion. A 2D nonlinear finite element model was developed using ABAQUS/Explicit commercial program for modelling and analyzing damage mechanisms of silicon carbide reinforced aluminum matrix composites. The predicted results have shown a good agreement with the experimental data in the forms of true stress–strain curves and failure shape. Unlike the existing models, the influence of the volume fraction and size of SiC particles on the deformation, damage mechanism, failure consequences, and stress–strain curve of A359/SiC particulate composites is investigated accounting for the different possible modes of failure simultaneously.

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