On the possibility to obtain the stress-strain curve for a strain-hardening material by spherical indentation
by M. Beghini, L. Bertini, V. Fontanari
International Journal of Computer Applications in Technology (IJCAT), Vol. 15, No. 4/5, 2002

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.

Online publication date: Tue, 15-Jul-2003

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