RVE Based Numerical Evaluation on Effective Mechanical Properties of Composite with Randomly Distributed Multi-Phase Inclusions

2011 ◽  
Vol 383-390 ◽  
pp. 931-934
Author(s):  
Chun Li ◽  
Lei Chen ◽  
Li Qiao
Keyword(s):  
Mechanical Properties ◽  
Numerical Evaluation ◽  
Composite Ceramic ◽  
Homogenization Theory ◽  
Numerical Homogenization ◽  
Cell Models ◽  
Experiment Data ◽  
Sequential Adsorption ◽  
Multi Phase ◽  
Effective Mechanical Properties

The purpose of this paper is to evaluate the effective mechanical properties of composite ceramic with randomly distributed multi-phase inclusions. The RVE finite element subcell technique based on numerical homogenization theory is used to separate the multi-phase composite into the layered unit cell models which are generated by a modified random sequential adsorption algorithm (RSA). The numerical results are also compared and verified with experiment data.

Effective Mechanical Properties for Composites with Three-Phase Randomly Distributed Aggregates Predicted by Multi-Step Mori-Tanaka Method

2012 ◽  
Vol 232 ◽  
pp. 73-77
Author(s):  
Dong Mei Luo ◽  
Wen Xue Wang ◽  
Qiu Yan Chen ◽  
Hong Yang ◽  
Ying Long Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Homogenization Method ◽  
Homogenization Theory ◽  
Young’S Moduli ◽  
Three Phase ◽  
Multi Phase ◽  
Poisson's Ratios ◽  
Poisson’S Ratios ◽  
Effective Mechanical Properties ◽  
Properties Of Composites

Multi-step Mori-Tanaka method (MMT) is applied to the estimation of the effective mechanical properties for composites with three-phase randomly distributed aggregates in this paper. The Multi-phase Homogenization Theory (MHT) which is based on mathematical homogenization method and is employed to verify the results of MMT method. Results show that MMT method is reasonable and practicable to predict the effective mechanical properties of composites with several phases, and the Young’s moduli and Poisson’s ratios of each phase may have some effects on the effective mechanical properties of multi-phase composites.

On the Effective Mechanical Properties of Fluid-Saturated Composites: A Homogenization Approach

2010 ◽  
Vol 654-656 ◽  
pp. 2273-2276
Author(s):  
Lian Hua Ma ◽  
Bernard F. Rolfe ◽  
Qing Sheng Yang ◽  
Chun Hui Yang
Keyword(s):  
Mechanical Properties ◽  
Effective Properties ◽  
Micromechanical Model ◽  
Fluid Pressure ◽  
Fluid Phase ◽  
Homogenization Theory ◽  
Small Scale ◽  
Multi Scale ◽  
Homogenization Approach ◽  
Effective Mechanical Properties

Composites containing saturated fluid are widely distributed in nature, such as saturated rocks, colloidal materials and biological cells. In the study to determine effective mechanical properties of fluid-saturated composites, a micromechanical model and a multi-scale homogenization-based model are developed. In the micromechanical model the internal fluid pressure is generated by applying eigenstrains in the domain of the fluid phase and the explicit expressions of effective bulk modulus and shear modulus are obtained. Meanwhile a multi-scale homogenization theory is employed to develop the homogenization-based model on determination of effective properties at the small scale in a unit cell level. Applying the two proposed approaches, the effects of the internal pressure of hydrostatic fluid on effective properties are further investigated.

scholarly journals Homogenization of Heterogeneous Tissue Scaffold: A Comparison of Mechanics, Asymptotic Homogenization, and Finite Element Approach

2005 ◽  
Vol 2 (1) ◽  
pp. 17-29 ◽  
Author(s):  
Z. Fang ◽  
C. Yan ◽  
W. Sun ◽  
A. Shokoufandeh ◽  
W. Regli
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Finite Element ◽  
Effective Properties ◽  
Tissue Scaffolds ◽  
Homogenization Theory ◽  
Tissue Scaffold ◽  
Finite Element Approach ◽  
Element Approach ◽  
Effective Mechanical Properties

Actual prediction of the effective mechanical properties of tissue scaffolds is very important for tissue engineering applications. Currently common homogenization methods are based on three available approaches: standard mechanics modeling, homogenization theory, and finite element methods. Each of these methods has advantages and limitations. This paper presents comparisons and applications of these approaches for the prediction of the effective properties of a tissue scaffold. Derivations and formulations of mechanics, homogenization, and finite element approach as they relate to tissue engineering are described. The process for the development of a computational algorithm, finite element implementation, and numerical solution for calculating the effective mechanical properties of porous tissue scaffolds are also given. A comparison of the results based upon these different approaches is presented. Parametric analyses using the homogenization approach to study the effects of different scaffold materials and pore shapes on the properties of the scaffold are conducted, and the results of the analyses are also presented.

Phase precipitation behavior and mechanical properties of multi-phase Nb-Ti-C and Nb-Ti-Al-C alloys

2021 ◽  
pp. 141218
Author(s):  
Wenqing Wei ◽  
Jing Sun ◽  
Shuzhi Zhang ◽  
Bingqiang Liu ◽  
Kai Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Precipitation ◽  
Precipitation Behavior ◽  
Multi Phase

Influences of Sintering Process on the Microstructure and Mechanical Behavior of ZrO2 Nano-Composite Ceramic Tool and Die Material

2010 ◽  
Vol 154-155 ◽  
pp. 1356-1360 ◽  
Author(s):  
Ming Dong Yi ◽  
Chong Hai Xu ◽  
Jing Jie Zhang ◽  
Zhen Yu Jiang
Keyword(s):  
Mechanical Properties ◽  
Ceramic Material ◽  
Composite Ceramic ◽  
Sintering Process ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Pure Zro2 ◽  
Die Materials ◽  
Die Material ◽  
Composite Ceramic Material

A new ZrO2 nano-composite ceramic tool and die material was prepared with vacuum hot pressing technique. The effects of sintering parameters on the nano-composite ceramic tool and die materials were studied. The results indicated that the mechanical properties of ZrO2 nano-composite ceramic tool and die material with the additions of TiB2 and Al2O3 are higher than that of the pure ZrO2 ceramic material. Sintering at 1100 for 120min could improve the density and mechanical properties of ZrO2 nano-composite ceramic material. The flexural strength, fracture toughness and hardness with the optimum sintering parameters can reach 878MPa, 9.54MPa•m1/2 and 13.48GPa, respectively, obviously higher than that with non-optimum sintering parameters.

Fabrication and Mechanical Properties of Homogenous and Graded Si3N4/(W, Ti)C Nano-Composite Ceramic Tool Materials

2014 ◽  
Vol 800-801 ◽  
pp. 511-515
Author(s):  
Xian Hua Tian ◽  
Jun Zhao ◽  
Shuai Liu ◽  
Zhao Chao Gong
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Graded Materials ◽  
Tool Materials ◽  
Graded Structure ◽  
Design Ideas ◽  
Novel Design

Close attention has been paid to Functional graded materials (FGMs) worldwide for their novel design ideas and outstanding properties. To verify the advantage of FGMS in the design of ceramic tool materials, Si3N4/(W, Ti)C nanocomposite ceramic tool materials with homogenous and graded structure were fabricated by hot pressing and sintering technology. The flexural strength, fracture toughness and hardness of the sintered composites were tested and compared. The experimental results showed that the graded structure improved mechanical properties of the ceramic tool materials, especially the flexural strength and fracture toughness. The introduction of residual compressive stress in the surface layer contributes to the improvement of the properties .

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