Elastic and elastic–plastic singular fields around a crack-tip in particulate-reinforced composites with progressive debonding damage

Tohgo, Keiichiro; Itoh, Takanori

doi:10.1016/j.ijsolstr.2005.04.013

Cited by 21 publications

(8 citation statements)

References 45 publications

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“…The research results of [11,19] indicate that the fracture fraction of SiC particles is equal to the volume fraction; the number of fractured and debonding SiC particles per unit volume can be expressed as follows:…”

Section: Fracture Forcementioning

confidence: 99%

A model for grinding forces prediction in ultrasonic vibration assisted grinding of SiCp/Al composites

Zhou

Zheng

2016

Int J Adv Manuf Technol

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Ultrasonic vibration assisted grinding is an advanced method for machining difficult-to-process materials such as SiCp/Al composites. This paper presents a mechanics model for predicting grinding forces in ultrasonic vibration assisted grinding of SiCp/Al composites. It consists of side grinding force model and end grinding force model. In side grinding force model, the major components are the normal force and tangential force in which the analytical expressions for the chip formation force based on Rayleigh's probability density function, the frictional force, and the particle fracture force based on Griffith theory are established, respectively. In contrast, the axial force developed based on the indentation theory is the major component in end grinding force model. The coefficients in the proposed grinding force model were obtained through two groups of orthogonal experiments. Based on the mechanics prediction model, the relationship between grinding forces and process variables were predicted. At last, two groups of single factor experiments were conducted to verify the proposed grinding force model and experimental results were found to agree well with predicted results.

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Section: Fracture Forcementioning

confidence: 99%

A model for grinding forces prediction in ultrasonic vibration assisted grinding of SiCp/Al composites

Zhou

Zheng

2016

Int J Adv Manuf Technol

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“…Recently, Zhu et al (2012) developed a micromechanics model for predicting the mechanical performance of bimodal metals, where the secant modulus and the full variable form were adopted. For particle-reinforced composites, Tohgo and Itoh (2005) and Tohgo and Weng (1994) proposed an incremental damage model taking into account plasticity of the matrix and progressive particle damage based on the Eshelby's equivalent inclusion method (Eshelby, 1957) and Mori-Tanaka's mean field concept (Mori and Tanaka, 1973). This model was also extended to account for the progressive cracking damage of reinforcements in discontinuously reinforced composites (Tohgo et al, 1996;Tohgo and Cho, 1999).…”

Section: Introductionmentioning

confidence: 99%

A micromechanics-based incremental damage theory of bulk metallic glass matrix composites

Jiang

Tohgo

Shimamura

2015

International Journal of Damage Mechanics

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Based on the Mori-Tanaka's mean field concept, a micromechanics-based incremental damage theory was developed to investigate the mechanical performance of bulk metallic glass matrix composites under tension. Firstly, the shear band was considered to be a microcrack, and therefore a spherical fictitious inclusion-containing microcracks and the surrounding bulk metallic glass matrix were constructed. Based on the equivalence between the effective elasticity of microcrack-containing media and porous material, the volume fraction of the fictitious inclusion could be determined by the density of microcracks generated during a strain increment. The stress-based Weibull probability distribution function and percolation theory were applied to describe the microcrack evolution that results in the progressive damaging of bulk metallic glass composites. Based on the present model, the impact of shear bands on the tensile ductility was discussed for the composites with various microstructures. The predictions are in fairly good agreement with the experimental data, demonstrating that the developed analytical model is capable of successfully capturing the main features, such as yield strength, strain hardening, and stress softening elongation, of particle-toughened bulk metallic glass. The main conclusions will shed some light on optimizing the microstructures in effectively improving the tensile ductility of bulk metallic glass composites.

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“…Some of the micromechanics-based models have an advantage of easy implementation into a finite element method. Tohgo et al [35] and Tohgo and Itoh [36] introduced their damage model into a finite element method, and carried out damage analysis of a crack-tip field in particulate-reinforced composites. Based on the experimental and numerical results, they discussed roles of intact particles and debonding damage on toughening of composites.…”

Section: Introductionmentioning

confidence: 99%

A constitutive model of particulate-reinforced composites taking account of particle size effects and damage evolution

Tohgo

Itoh

Shimamura

2010

Composites Part A: Applied Science and Manufacturing

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This paper deals with a constitutive model of particulate-reinforced composites which can describe the evolution of debonding damage, matrix plasticity and particle size effects on deformation and damage. An incremental damage model of particulate-reinforced composites based on the Mori-Tanaka's mean field concept has been extended to consider the particle size effects by using the Nan-Clarke's simple method. The particle size effect on deformation is realized by introducing dislocation plasticity for stress-strain relation of in-situ matrix in composites, and the particle size effect on damage is described by a critical energy criterion for particle-matrix interfacial debonding. For composites containing particles of various sizes, the effects of particle size distribution is incorporated into the model. Influence of debonding damage, particle size and particle volume fraction on overall stress-strain response of composites is discussed based on numerical results.

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Elastic and elastic–plastic singular fields around a crack-tip in particulate-reinforced composites with progressive debonding damage

Cited by 21 publications

References 45 publications

A model for grinding forces prediction in ultrasonic vibration assisted grinding of SiCp/Al composites

A model for grinding forces prediction in ultrasonic vibration assisted grinding of SiCp/Al composites

A micromechanics-based incremental damage theory of bulk metallic glass matrix composites

A constitutive model of particulate-reinforced composites taking account of particle size effects and damage evolution

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