On the possibility to obtain the stress-strain curve for a strain-hardening material by spherical indentation. (1st January 2002)

• Record Type: Journal Article
• Authors: Beghini, M.; Bertini, L.; Fontanari, V.
• Editors: Bozzine, B.; Serra, M.; Fanigliulo, A.; Antonetti, L.; Boniardi, M.
• Is Part Of: International journal of computer applications technology. Volume 15:Number 4/5(2002)
• Page Start: 168
• Page End: 175
• Publication Date: 2002-01-01
• Subjects: spherical indentation -- stress-strain curve -- strain-hardening -- numberical modelling; Technology -- Data processing -- Periodicals; 620.00285
• Languages: English
• ISSNs: 0952-8091

Abstract

A numerical approach aimed at evaluation the stress-strain curve for metallic materials starting from the results of instrumented spherical indentation tests is presented. The spherical indentation for materials having different σ-ε curves was modelled by means of a parametric finite-elements analysis. It was studied as the shape of the indentation crater evolves with the load and it was verified that it depends on the strain-hardening and yield stress of the material. By means of an elaboration of these results, an iterative procedure was set up, which allows the σ-ε curve to be obtained with satisfactory accuracy for a large class of materials. The procedure was tested by interpreting a simulated indentation test on a typical structural steel, thus confirming its validity and accuracy.