A constitutive description for casting aluminum alloy A104 based on the analysis of cylindrical and spherical void models

Chen, B.; Peng, Xianghe; Fan, Jinghong; Chen, S.

doi:10.1016/j.ijplas.2005.04.004

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Therefore ratcheting is one of important factors that should be considered in the design of such structures and components. In the last two decades, uniaxial and multiaxial ratcheting behaviors were studied experimentally and theoretically by some researchers [1][2][3][4]. However, most of existing works were only focused on the ratcheting behaviors and its constitutive model.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on ratcheting-fatigue interaction of 20 carbon steel in uniaxial cyclic loading

2008

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The ratcheting behaviors and fatigue failure, as well as their interaction were investigated by uniaxial cyclic stressing tests for 20 carbon steel at room temperature. The ratcheting strain and fatigue life of the material were measured in varied loading levels. The effects of mean stress, stress amplitude and stress ratio on the ratcheting strain and final failure life were discussed. The experimental results show that the ratcheting strain and fatigue life of the material greatly depend on mean stress, stress amplitude and stress ratio in asymmetric stress cycling, and two kinds of failure modes (i.e., ratcheting failure due to large ratcheting strain and fatigue failure caused by the fatigue crack) occur respectively, depending on the applied stress level in the tests.

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Section: Introductionmentioning

confidence: 99%

Experimental study on ratcheting-fatigue interaction of 20 carbon steel in uniaxial cyclic loading

2008

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“…On the other hand, Aluminum (Al), an fcc metal, has been widely utilized in architecture, automotive, and military industry. Study on Aluminum and its alloys has been a hot topic [16][17][18][19] investigated the distribution of micro voids in Al under impact loading experimentally using Scanning Electron Microscope(SEM) and Transmission Electron Microscope(TEM). Results showed that a lot of dislocations were generated around the voids.…”

Section: Introductionmentioning

confidence: 99%

MD Simulation on Evolution of Micro Structure and Failure Mechanism around Interactional Voids in Pure Al

Yuan

Chen

Zeng

et al. 2013

AMM

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Experiments have shown that initial voids may exist in the manufacturing processes of pure aluminum, which adversely affect its mechanical properties. In this study, the process of plastic deformation around voids in pure aluminum was examined at atomic scale through molecular dynamics (MD) simulation. The Modified Embedded Atom Method (MEAM) was employed to characterize the atomic interactions in the pure aluminum with two voids. The calculation results revealed that the interaction of two voids endures three phases when the interval of the voids is increased: void coalescence, void coactions followed by the formation of a stress shield zone, and interaction vanishing. The critical parameters of the interval for the three phases were defined as well in this work. It was observed that crack initiated and further propagated near the voids along the slip systems of FCC crystal, which eventually caused structural failure. Meanwhile, the evolution of micro structure in the crack propagation process was investigated by means of Common Neighbor Analysis (CNA). The results showed that the phase transformation occurred near the voids during loading process.

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“…It involves different damage mechanisms and can predict different modes of failure of quasi-brittle materials under different states of stress (Peng et al, 1997). They also studied a representative cell of the material containing cylindrical or spherical voids and obtained the microscopic stress fields in two types of void-cell models, in which the evolution of void growth and void nucleation were embedded in the elastoplastic description of materials (Chen et al, 2005).…”

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confidence: 99%

Preface

Huang

2010

International Journal of Damage Mechanics

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The studies on the subject of damage and fracture mechanics and related research works in China have achieved significant progress and contributed to the developments of engineering and technology during the last two decades. To reflect the recent achievements in the subject gained in Mainland China and to enhance the cross-fertilization between the Chinese researchers and the International Journal of Damage Mechanics as well as the international readers of the journal, we present this series of special issues of 'Damage Mechanics in China'.Owing to the limitation in space, only 10 papers are included in the special issues. Nevertheless, these 10 papers bring together leading scholars and researchers from various material disciplines, covering metals (Papers 1, 4, 6), rocks (Papers 2, 7, 8), concrete (Papers 3, 10) and composites (Papers 5, 9), encompassing analytical, numerical and experimental aspects.Recognizing the deficiency of the current issues in providing a comprehensive survey of damage mechanics in China, we first attempt to present a brief review of previous work in the studies on damage mechanics in China, and then give a brief overview of all 10 papers presented in the special issues.In accordance with the rapid development of large scale engineering projects in China, particularly for infrastructures and industrial equipments in large scales, the works on damage in materials and structures under various loading conditions have gained rapid progress recently, covering metals, composites, rocks, and concretes, etc. Among these works, some enlightening observations, novel concepts, new computational algorithms, and innovative framework on damage mechanics have emerged.As early as the 1960s in the twentieth century, (Xing, 1966) proposed a nonequilibrium statistical theory of damage and fracture, in which the micro-damage evolution describing its nucleation and growth was presented by means of the Fokker-Planck equation with a nucleation term. The coefficients of the equation, the micro-damage growth rate and nucleation rate result from microscopic dislocation or point defect mechanism. From this equation, the new statistical damage concept for solids the damage-fracture probability with its kinetic equation was introduced. The macro-mechanical quantities related to damage and fracture such as brittle strength, fracture toughness, fatigue life, fatigue strength and their statistical

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A constitutive description for casting aluminum alloy A104 based on the analysis of cylindrical and spherical void models

Cited by 7 publications

References 21 publications

Experimental study on ratcheting-fatigue interaction of 20 carbon steel in uniaxial cyclic loading

Experimental study on ratcheting-fatigue interaction of 20 carbon steel in uniaxial cyclic loading

MD Simulation on Evolution of Micro Structure and Failure Mechanism around Interactional Voids in Pure Al

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