Residual Stress Fields at the Surface of Sharp Pyramid Indentations

This paper describes an experimental measurement of the residual stress field around Berkovich and Knoop indentations on the surface of soda-lime glass. The isostress contours of both the residual tensile and compressive stress are presented. The results are compared with similar measurements around Vickers indentations on the same glass. The residual stress field around all three different shapes of indentations is clearly nonequal biaxial, with characteristic differences in the form of the stress contours that relate to each specific shape. The results for Berkovich indentation are compared with finite element (FEM) numerical calculations. Some general conclusions related to the sharp indentations are deduced from this study.

[1]  S. Biswas,et al.  Examination of stress fields in elastic-plastic indentation , 1993 .

[2]  B. Lawn,et al.  A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness: II, Strength Method , 1981 .

[3]  A. Giannakopoulos,et al.  Analysis of Vickers indentation , 1994 .

[4]  K. Zeng,et al.  Vickers indentations in glass—I. Residual stress fields and iso-stress contour maps , 1995 .

[5]  B. Lawn,et al.  Residual stress effects in sharp contact cracking , 1979 .

[6]  K. Zeng,et al.  Experimental Measurement of Residual Stress Field around Sharp Indentation in Glass , 1994 .

[7]  Anthony G. Evans,et al.  A Simple Method for Determining Elastic‐Modulus–to‐Hardness Ratios using Knoop Indentation Measurements , 1982 .

[8]  Shu-Sheng Chiang,et al.  THE RESPONSE OF SOLIDS TO ELASTIC/ PLASTIC INDENTATION , 1980 .

[9]  D. Clarke,et al.  Measurement of Stresses Using Fluorescence in an Optical Microprobe: Stresses around Indentations in a Chromium‐Doped Sapphire , 1990 .

[10]  Michael V. Swain,et al.  Indentation deformation/fracture of normal and anomalous glasses , 1979 .

[11]  E. Yoffe,et al.  Elastic stress fields caused by indenting brittle materials , 1982 .

[12]  A. E. Giannakopoulos,et al.  Analysis of Berkovich indentation , 1996 .

[13]  B. Lawn,et al.  Indentation fracture: principles and applications , 1975 .

[14]  K. Puttick,et al.  Stress fields round indentations in poly(methyl methacrylate) , 1977 .

[15]  A. E. Giannakopoulos,et al.  Vickers indentations in glass—II. Comparison of finite element analysis and experiments , 1995 .

[16]  Brian R. Lawn,et al.  Residual stress effects in sharp contact cracking , 1979 .