A KIND OF PHYSICS INTERPRETATIONS OF MATERIAL LENGTH SCALES

摘要：

In the present research,a new mechanics model is presented and used to characterize the trans-scale mechanical behavior from nano-scale to macroscopic scale.In the mechanics model,both surface effect and strain gradient effect are considered.In order to interpret the physics meanings of the material length parameters included in the mechanics model,a new method will be used to represent the length parameters and a clear physics interpretation is obtained.Specifically,we use both the strain gradient theory and the Cauchy-Born rule to characterize the mechanics behaviors and then make a linkage for both kinds of results according to equivalence of strain energy densities.The values of the materials length parameters included in the strain gradient theory are expressed with the physics parameters included in the Cauchy-Born rule.As the example,for the face-centered cubic metals,the values and variation trends of the length scale parameters are obtained.

关键词： Mechanical behavior Length scale Surface effect Strain gradient effect Cauchy-Born rule

作者: J.R.Song J.Y.Liu Y.G.Wei

作者单位: State-Key Laboratory of Nonlinear Mechanics,Chinese Academy of Sciences,Beijing 100190,China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 341-347

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）