金属学报  1995, Vol. 31 Issue (10): 431-437

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一种新的位错运动理论及对材料动态力学行为的描述

程经毅;周光泉

中国科技大学

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)

程经毅;周光泉. 一种新的位错运动理论及对材料动态力学行为的描述[J]. 金属学报, 1995, 31(10): 431-437.
, . A NEW THEORY OF DISLOCATION MOTION AND ITS APPLICATION TO DESCRIPTION OF DYNAMIC MECHANICAL BEHAVIOUR OF MATERIALS[J]. Acta Metall Sin, 1995, 31(10): 431-437.

摘要 参考文献 相关文章 Metrics 全文: PDF(497 KB)   摘要: 通过对位错在晶格内运动的动力学过程的全面分析，本文提出了一种考虑到粘性阻尼效应和热激活的位错集体运动统一理论，其特点是可用一简单的方程对从低速到高速运动的大量位错的平均行为进行统一描述。对ＫＣｌ晶体的典型实验数据的拟合发现理论描述与实验结果相当一致。本理论将可为构造描述材料宏观力学行为的本构模型提供正确的基本出发点。 关键词 ： 位错动力学,  粘性阻尼效应,  统一理论     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 收稿日期: 1995-10-18      基金资助:国家自然科学基金;;８６３资助 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 程经毅 周光泉 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/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] 熊健,魏德安,陆宋江,阚前华,康国政,张旭. 位错密度梯度结构Cu单晶微柱压缩的三维离散位错动力学模拟[J]. 金属学报, 2019, 55(11): 1477-1486. [2] 郭祥如, 孙朝阳, 王春晖, 钱凌云, 刘凤仙. 基于三维离散位错动力学的fcc结构单晶压缩应变率效应研究[J]. 金属学报, 2018, 54(9): 1322-1332. [3] 余勇 潘晓霞. Frank-Read位错源的细观级模拟[J]. 金属学报, 2009, 45(11): 1309-1313. [4] 杨继红 . 边界条件对离散位错动力学模拟疲劳Cu单晶位错花样的影响[J]. 金属学报, 2003, 39(7): 704-710 . Viewed Full text Abstract Cited   Shared      Discussed