Acta Metall Sin  1995, Vol. 31 Issue (10): 431-437    DOI:

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A NEW THEORY OF DISLOCATION MOTION AND ITS APPLICATION TO DESCRIPTION OF DYNAMIC MECHANICAL BEHAVIOUR OF MATERIALS

CHENG Jingyi;ZHOU Guangquan(University of Science and Technology of China;Hefei 230026)(Manuscript received 1995-01-03; in revised form 1995-06-10)

CHENG Jingyi;ZHOU Guangquan(University of Science and Technology of China;Hefei 230026)(Manuscript received 1995-01-03; in revised form 1995-06-10). A NEW THEORY OF DISLOCATION MOTION AND ITS APPLICATION TO DESCRIPTION OF DYNAMIC MECHANICAL BEHAVIOUR OF MATERIALS. Acta Metall Sin, 1995, 31(10): 431-437.

Abstract References Related Articles Recommended Metrics Download:  PDF(497KB)  Export:  BibTeX | EndNote (RIS)       Abstract  By the analysis of the dynamic processes of the movement of dislocations through a crystal lattice, a unified theory of collection dislocation motion including both thermal activation and viscous drag effects is proposed. The theory is able to describe the average behaviour of dislocations which move at low and high velocities with a simple equation.The experimental dislocation velocity─stress relation data of KCl crystals are fitted with the theory. Good consistency is obtained. The theory can be used as the start point in establishing the constitutive laws of macroscopic plastic deformation of crystalline materials.Correspondent. CHENG Jingyi, associate professor, Department of Mechanics and Mechanical Engineering,University of Science and Technology of China, Hefei 230026 Key words:  dislocation dynamics      viscous drag effect      unified theory      Received:  18 October 1995      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1995/V31/I10/431 1KocksUF,ArgonAS,AshbyMF．ProgMaterSci,1975;19:12NadgornyiE．ProgMaterSci,1988;31:13SchockG．In:NabarroFRNed．,DislocationsinSolids,Vol,3,North─Holland,1980:634周光泉,程经毅.In:王礼立等编,冲击动力学进展.合肥:中国科技大学出版社,1992:585FollansbeePS,RegazzoniG,KocksUF.ConfSerInstPhys,1984;70:716SeegerA．PhilosMag,1955;46:11947LubenetsSV,StartsevVI．SovietPhys─SolidsState,1968;10:15 [1] XIONG Jian,WEI Dean,LU Songjiang,KAN Qianhua,KANG Guozheng,ZHANG Xu. A Three-Dimensional Discrete Dislocation Dynamics Simulation on Micropillar Compression of Single Crystal Copper with Dislocation Density Gradient[J]. 金属学报, 2019, 55(11): 1477-1486. [2] Xiangru GUO, Chaoyang SUN, Chunhui WANG, Lingyun QIAN, Fengxian LIU. Investigation of Strain Rate Effect by Three-Dimensional Discrete Dislocation Dynamics for fcc Single Crystal During Compression Process[J]. 金属学报, 2018, 54(9): 1322-1332. [3] YU Yong PAN Xiaoxia. MESO-SCALE SIMULATION OF FRANK-READ DISLOCATION SOURCES[J]. 金属学报, 2009, 45(11): 1309-1313. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed