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

This thesis transports you to a wonderful and fascinating small-scale world and tells you the origin of several new phenomena. The investigative tool is the improved discrete dislocation-based multi-scale approaches, bridging the continuum modeling and atomistic simulation. Mechanism-based theoretical models are put forward to conveniently predict the mechanical responses and defect evolution. The findings presented in this thesis yield valuable new guidelines for microdevice design, reliability analysis and defect tuning.

Nominated as an outstanding thesis by Tsinghua University Elucidates new, atypical, small-scale plasticity mechanisms Provides valuable guidelines for microdevice design, reliability analysis, and defect tuning Includes supplementary material: sn.pub/extras

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Education:Sep. 2005Jul. 2009, BS in School of Material Science and Engineering, Shandong UniversitySep. 2009-Jan. 2015, PhD in Department of Engineering Mechanics, Tsinghua UniversityPrizes and Awards:[1] Excellent Doctoral Dissertation, Tsinghua University 2015[2] Gao Tian Scholarship, Second Prize, Tsinghua University 2010,2014 (Twice)[3] Youth Outstanding Paper Award, Beijing Society of Theoretical and Applied Mechanics, 2015[4] Excellent graduates in Shandong Province, Shandong Province 2009[5] Excellent student in Shandong Province, Shandong Province 2007,2008 (Twice)[6] National Scholarship, China 2007[7] President Scholarship, Shandong University 2007[8] Top Ten League Member, Shandong University 2007[9] Prominent student in summer practice, Shandong University 2007[10] Excellent student cadre, Shandong University 2006,2007,2008 (Thrice)[11] Student Scholarship, First prize, Shandong University 2006,2007,2008 (Thrice)Publications:[1] YN Cui, ZL Liu, Z Zhuang. Theoretical and numerical investigations on confined plasticity inmicropillars. Journal of the Mechanics and Physics of Solids, 2015, 76: 127143[2] YN Cui, ZL Liu, ZJ Wang, Z Zhuang. Atypical dislocation behavior under low amplitude cyclic loading:experiment, simulation and theoretical model. Journal of the Mechanics and Physics of Solids, (accepted)[3] YN Cui, ZL Liu, Z Zhuang. Quantitative investigations on dislocation based discrete-continuous modelof crystal plasticity at submicron scale. International Journal of Plasticity , 2015, 69, 54-72[4] YN Cui, P Lin, ZL Liu, Z Zhuang. Theoretical and numerical investigations of single arm dislocationsource controlled plastic flow in FCC micropillars. International Journal of Plasticity, 2014, 55, 279-292[5] YN Cui, ZL Liu, Z Zhuang. Dislocation Multiplication by Single Cross Slipfor FCC at Submicron Scales.Chinese Physics Letters, 2013, 30(4), 046103[6] ZJ Wang, QJ Li, YN Cui, ZL Liu, E Ma, J Li, J Sun, Z Zhuang, M Dao, ZW Shan, S Suresh. Cyclicdeformation leads to defect healing and strengthening of small-volume metal crystals. Proceedings of theNational Academy of Sciences. 2015, 112(44) 13502-13507[7] P Lin, ZL Liu, YN Cui, Z Zhuang. A stochastic crystal plasticity model with size-dependent andintermittent strain bursts characteristics at micron scale. Heal submicron-sized Al single crystal throughlow amplitude cyclic loading. International Journal of Solids and Structures, 2015, 69-70, 267-276[8] JQ Hu, ZL Liu, YN Cui, ZJ Wang, ZW Shan, Z Zhuang. Sensitive material behavior: theoretical modeland experiment for compression collapse of gold particles at submicron scale, Journal of AppliedMechanics, 2014, 81, 091007[9] Z Zhuang, YN Cui, Y Gao, ZL Liu. Advances in discrete dislocation mechanism on submicro crystalatypical plasticity. Advances in Mechanics, 2011 (Chinese Journal)[10] YN Cui, Y Gao, ZL Liu, Z Zhuang. Developing multi-scale model to study atypical crystal plasticbehavior, Advances in Heterogeneous Material Mechanics ICHMM-2011, DEStech Publications, 730-737.(International conference)[11] YN Cui, et al. Investigation of single arm source controlled plastic flow in FCC micropillar by discretedislocation dynamics and theoretical analysis. WCCM XI 2014 (International conference)