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The Resource The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale

The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale

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The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale
Title
The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale
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eng
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MiAaPQ
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non fiction
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dictionaries
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Springer Theses Ser
The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale
Label
The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale
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http://libproxy.rpi.edu/login?url=https://ebookcentral.proquest.com/lib/rpi/detail.action?docID=4728166
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Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Color
multicolored
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Contents
  • Supervisor's Foreword -- Abstract -- Parts of this thesis have been published in the following articles:Cui YN, Liu ZL, Zhuang Z. Theoretical and numerical investigations on confined plasticity in micropillars. Journal of the Mechanics and Physics of Solids, 2015, 76, 127-143 (Reproduced with Permission).Cui YN, Liu ZL, Wang ZJ, Zhuang Z. Mechanical annealing under low amplitude cyclic loading in micropillars. Journal of the Mechanics and Physics of Solids, 2016, 89, 1-15 (Reproduced with Permission).Cui YN, Lin P, Liu ZL, Zhuang Z -- Acknowledgments -- Contents -- 1 Introduction -- 1.1 Background and Significance -- 1.1.1 Size Effect of Yield Stress -- 1.1.2 Strain Burst and Dislocation Avalanches -- 1.1.3 Size Effect of Cyclic Behavior -- 1.2 Research Methods -- 1.2.1 Non-local Crystal Plasticity -- 1.2.2 Discrete Dislocation Dynamics Simulation Method -- 1.3 Research Content -- References -- 2 Discrete-Continuous Model of Crystal Plasticity -- 2.1 Introduction of Simulation Method -- 2.1.1 Discrete Dislocation Dynamics (DDD) -- 2.1.1.1 Dislocation Kinetic Equation -- 2.1.1.2 Dislocation Reaction and Topology Update -- 2.1.1.3 Dislocation Cross Slip -- 2.1.2 Coupling DDD with Finite Element Method -- 2.1.2.1 Superposition Method (SPM) -- 2.1.2.2 Discrete-Continuous Model (DCM) -- 2.2 Improved Discrete-Continuous Model -- 2.2.1 Efficient Regularization Method -- 2.2.1.1 Review of Different Regularization Methods -- 2.2.1.2 Novel Regularization Method -- 2.2.1.3 Stress Field Calculation of Prismatic Loop -- 2.2.2 Image Force Calculation -- 2.2.2.1 Stress Interpolation -- 2.2.2.2 Hybrid DCM Method -- 2.2.3 Finite Deformation -- 2.2.3.1 Deformation Field Transfer and Surface Dislocation Treatment -- 2.2.3.2 Slip System Rotation -- 2.2.3.3 Reproduction of Slip Step -- 2.2.4 Application in Heteroepitaxial Film
  • 2.2.4.1 Thermoelastic Calculation to Determine Internal Stress Field -- 2.2.4.2 Influence of Substrate Thickness on Dislocation Behavior -- 2.3 Summary -- References -- 3 Single Arm Dislocation Source Controlled Plastic Flow in FCC Micropillars -- 3.1 Simulation Setup -- 3.2 Simulation Results -- 3.2.1 SAS Controlled Strain Burst -- 3.2.2 The Absence of Strain Hardening -- 3.2.3 SAS Controlled Dislocation Density Evolution -- 3.3 Theoretical Analysis -- 3.3.1 Dislocation Density Evolution Model -- 3.3.2 Predicting the Flow Stress -- 3.4 Implications for Strain Hardening at Small Scales -- 3.5 Summary -- References -- 4 Confined Plasticity in Micropillars -- 4.1 Simulation Setup -- 4.2 Results and Discussion -- 4.2.1 Stress-Strain Curves in Coated and Uncoated Pillars -- 4.2.2 Dislocation Source Mechanism in Coated Micropillar -- 4.2.3 Back Stress in Coated Micropillar -- 4.2.4 The Evolution of Mobile and Trapped Dislocation -- 4.3 Implications on Crystal Plasticity Model -- 4.4 Theoretical Model to Predict Stress-Strain Curve -- 4.4.1 Description of the Theoretical Mode -- 4.4.2 Prediction of Stress-Strain Curve -- 4.5 Preliminary Analysis of Coating Failure Mechanism -- 4.5.1 High Hoop Stress of the Coated Layer -- 4.5.2 Transmission Effect of Dislocations Across Coating -- 4.6 Summary -- References -- 5 Mechanical Annealing Under Low Amplitude Cyclic Loading in Micropillars -- 5.1 Simulation Setup -- 5.2 Simulation Results and Discussions -- 5.2.1 Cyclic Behavior of Collective Dislocations -- 5.2.2 Cyclic Instability of Dislocation Junction -- 5.2.2.1 Glissile Dislocation Junction -- 5.2.2.2 Sessile Dislocation Junction -- 5.3 Theoretical Model -- 5.3.1 Cyclic Enhanced Dislocation Annihilation Mechanism -- 5.3.2 Dislocation Density Influenced by Cyclic Slip Irreversibility -- 5.3.3 Critical Size for Mechanical Annealing -- 5.4 Summary -- References
  • 6 Conclusions and Outlook
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1 online resource (141 pages)
Form of item
online
Isbn
9789811030321
Media category
computer
Media MARC source
rdamedia
Media type code
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