Numerical and experimental analysis of indentation

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2005

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Koray, Erge

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Indentation tests are widely used with simultaneous measurements of indentation depth and force especially for determining material properties. In this study; numerical and experimental investigation of the force-indentation measurements is presented. For indentation tests on anisotropic metals, a novel indenter which is not self similar is used with three transducers to measure the displacements. It is seen that in order to have high repeatability and accuracy at the tests, workpiece and indenter parameters have crucial importance. These parameters in the indentations are analyzed by finite element methods. Ideal dimensions of the workpiece are determined. It is shown that plane strain conditions can only be achieved by embedded indentations. Effect of surface quality and clamping on repeatability are investigated. It is shown that surface treatments have significant effects on the results. Also it is seen that clamping increases the repeatability drastically. Moreover, indentation tests are conducted to verify the results of numerical simulations. Effect of anisotropy on the force-displacement curves is clearly observed.

Subject Keywords

Mechanical engineering.

URI

http://etd.lib.metu.edu.tr/upload/2/12605953/index.pdf
https://hdl.handle.net/11511/14943

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Koray, “Numerical and experimental analysis of indentation,” M.S. - Master of Science, Middle East Technical University, 2005.