固体力学学报
固體力學學報
고체역학학보
ACTA MECHANICA SOLIDA SINICA
2010年
1期
1-7
,共7页
纳米晶材料%微观力学%应变能%纯铜
納米晶材料%微觀力學%應變能%純銅
납미정재료%미관역학%응변능%순동
nanocrystalline materials%micromechanics%strain energy%pure copper
将纳米晶材料视为包括晶粒和晶界的两相复合材料.基于能量平衡概念推导出纳米晶材料的增量本构关系.最后将本文发展的模型用于纯铜的单轴拉伸实验,讨论了晶粒大小、形状和晶粒分布的影响,并将模型预测的结果和已有的实验结果进行比较.
將納米晶材料視為包括晶粒和晶界的兩相複閤材料.基于能量平衡概唸推導齣納米晶材料的增量本構關繫.最後將本文髮展的模型用于純銅的單軸拉伸實驗,討論瞭晶粒大小、形狀和晶粒分佈的影響,併將模型預測的結果和已有的實驗結果進行比較.
장납미정재료시위포괄정립화정계적량상복합재료.기우능량평형개념추도출납미정재료적증량본구관계.최후장본문발전적모형용우순동적단축랍신실험,토론료정립대소、형상화정립분포적영향,병장모형예측적결과화이유적실험결과진행비교.
Nanocrystalline (NC) materials can be treated as composite materials consisting of two phases, i.e. grain domain and grain boundary. In this paper, the incremental stress-strain relation is derived from the view point of energy balance. As a result, the stress-strain relation of different grain sizes is obtained, and also applied to the case of pure copper under uniaxial tension. In addition, the effects of grain shape and statistical distribution of grain sizes on the stress-strain relation are discussed, and the results predicted by the present model are compared with experimental data.
