On the problem of interpreting flexure experiments on semi-brittle materials

✍ Scribed by P. Lipetzky; A. Wanner

• Book ID: 103953908
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 851 KB
• Volume: 211
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(95)10161-6

✦ Synopsis

This investigation focuses on the relationship between the deformation behavior of semi-brittle materials tested in uniaxial and flexural geometries. It has been shown that flexural load-displacement data exhibit no detectable non-linearity until a significant volume of material has been plastically deformed near the region of maximum stress. Therefore, determination of yield stress from load-displacement data in bending and the assumption of an elastic stress distribution will give in general a 70% overestimation of the value measured uniaxially. By combining experimental and numerical analyses, a correction procedure has been de~eloped for materials that display work hardening behavior which allows for the approximation of uniaxial yield stress from flexural load-displacement data. The cast irons tested here show that a tension-compression asymmetry can also be easily taken into account with this method.