A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Two-step method to evaluate equibiaxial residual stress of metal surface based on micro-indentation tests
Highlights ► The sensitivity to residual stress was improved by selecting the depth parameter. ► Residual stress could be obtained while determining the effect of unknown parameters. ► The estimated residual stress agreed well with those of X-ray diffraction.
Abstract The present study proposed a method to evaluate the equibiaxial compressive residual stress of a metal surface by means of a depth-sensing indentation method using a spherical indenter. Inverse analysis using the elastic–plastic finite-element model for an indentation test was established to evaluate residual stress from the indentation load–depth curve. The proposed inverse analysis utilizes two indentation test results for a reference specimen whose residual stress is already known and for a target specimen whose residual stress is unknown, in order to exclude the effect of other unknown mechanical properties, such as Young’s modulus and yield stress. Residual stress estimated by using the indentation method is almost identical to that measured by X-ray diffraction for indentation loads of 0.49–0.98N. Therefore, it can be concluded that the proposed method can effectively evaluate residual stress on metal surface.
Two-step method to evaluate equibiaxial residual stress of metal surface based on micro-indentation tests
Highlights ► The sensitivity to residual stress was improved by selecting the depth parameter. ► Residual stress could be obtained while determining the effect of unknown parameters. ► The estimated residual stress agreed well with those of X-ray diffraction.
Abstract The present study proposed a method to evaluate the equibiaxial compressive residual stress of a metal surface by means of a depth-sensing indentation method using a spherical indenter. Inverse analysis using the elastic–plastic finite-element model for an indentation test was established to evaluate residual stress from the indentation load–depth curve. The proposed inverse analysis utilizes two indentation test results for a reference specimen whose residual stress is already known and for a target specimen whose residual stress is unknown, in order to exclude the effect of other unknown mechanical properties, such as Young’s modulus and yield stress. Residual stress estimated by using the indentation method is almost identical to that measured by X-ray diffraction for indentation loads of 0.49–0.98N. Therefore, it can be concluded that the proposed method can effectively evaluate residual stress on metal surface.
Two-step method to evaluate equibiaxial residual stress of metal surface based on micro-indentation tests
Nishikawa, Masaaki (author) / Soyama, Hitoshi (author)
2011-02-17
8 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2011
Spherical Indentation, Part II: Experimental Validation for Measuring Equibiaxial Residual Stresses
| British Library Online Contents | 2016
Determination of Flow Curves under Equibiaxial Stress Conditions
| British Library Online Contents | 2012
| British Library Online Contents | 2008
Fracture Mechanics Assessment of Planar Branched Cracks in an Equibiaxial Stress Field
| British Library Online Contents | 1995