Dual flat-spherical indentation for extracting elastic-plastic properties from rough metallic surfaces
- 주제(키워드) 도움말 Spherical indentation , Rough surface , FEA , Mechanical properties , Stress-strain curves
- 발행기관 ELSEVIER SCI LTD
- 발행년도 2021
- 총서유형 Journal
- 본문언어 영어
초록/요약 도움말
In this work, a dual flat-spherical indentation (DFSI) technique is developed for evaluating elastic-plastic properties from rough metallic surfaces. Since indentations on rough metallic surface produce dissimilar load-displacement (P-h) curves for the same material, finite element (FE) analyses and experiments demonstrate that DFSI method, in which rough surface is flattened by flat indenter before spherical indentation, extracts reproducible P-h curves from the flattened rough surface. Optimized indentation parameters are obtained by investigating the effects of surface roughness, flat indenter diameter, indentation depth on P-h curves. This allows to employ conventional spherical indentation (SI) method for property evaluation from DFSI P-h curves. The results are in good agreement with those from ideal smooth surface, and for rough surfaces (Ra = 0 similar to 20 mu m) common in engineering practice, the applicability of DFSI method is verified. (C) 2021 The Authors. Published by Elsevier Ltd.
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