On the possibility to obtain the stress-strain curve for a strain-hardening material by spherical indentation

被引：4

作者：

Beghini, M. ^{[1
]}

Bertini, L. ^{[1
]}

Fontanari, V. ^{[1
]}

机构：

[1] Dip. Ingegneria Mecc. Nucl./Prod., Università di Pisa, Pisa, Italy

来源：

International Journal of Computer Applications in Technology | 2002年 / 15卷 / 4-5期

关键词：

Computer simulation - Indentation - Iterative methods - Steel structures - Stress analysis - Yield stress;

D O I：

10.1504/IJCAT.2002.000292

中图分类号：

学科分类号：

摘要：

A numerical approach aimed at evaluating 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.

引用

页码：168 / 175