ANALYSIS OF MICRO-INDENTATION PROBLEM OFA SOFT FILM ON A HARD SUBSTRATE

摘要：

Two stages have been observed in micro-indentation experiment of a soft film on a hard substrate.In the first stage,the hardness of the thin film decreases with increasing depth of indentation when indentation is shallow; and in the second stage,the hardness of the film increases with increasing depth of indentation when the indenter tip approaches the hard substrate.In this paper,the new strain gradient theory is used to analyze the micro-indentation behavior of a soft film on a hard substrate.Meanwhile,the classic plastic theory is also applied to investigating the problem.Comparing two theoretical results with the experiment data,one can find that the strain gradient theory can describe the experiment data at both the shallow and deep indentation depths quite well,while the classic theory cant explain the experiment results.

关键词： strain gradient theory size effect soft film hard substrate

作者: D.K.Yi T.C.Wang

作者单位: LNM,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100086,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 342-347

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）