Evaluation of equi-biaxial residual stress from spherical indentation imprint
- 주제(키워드) 도움말 Residual stresses , Residual imprint , Spherical indentation , Finite element analysis (FEA) , Inverse analysis , Digital image correlation (DIC)
- 발행기관 PERGAMON-ELSEVIER SCIENCE LTD
- 발행년도 2021
- 총서유형 Journal
- 본문언어 영어
초록/요약 도움말
A novel approach is proposed for evaluating equi-biaxial residual stresses (RS) from residual imprint displacement fields after spherical indentation. A unique region, where displacements are free from frictional effect, is first identified based on finite element analysis. Regression functions are proposed to relate imprint data with RS for a broad range of material properties. Digital image correlation (DIC) is employed for measuring the radial displacement fields. Experimental comparison of RS values from the present method and strain gauge showed the (maximum, mean) errors of only (10, 5) %. As the determined RS are accurate and reliable, the methodology can find more industrial applications compared with prior techniques.
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