Four-Point Bending Test of Determining Stress-Strain Curves Asymmetric between Tension and Compression

Kato, H.; Tottori, Y.; Sasaki, K.
March 2014
Experimental Mechanics;Mar2014, Vol. 54 Issue 3, p489
Academic Journal
A method of determining both uniaxial tension and compression stress-strain curves from the result of a single four-point bending test was demonstrated. Stress-strain curves of magnesium showing tension-compression asymmetry due to twinning deformation and those of an S45C steel due to the Bauschinger effect were calculated. The Mayville-Finnie equation was modified slightly for this calculation. The calculation is sensitive to small change in the slope of bending curve, revealing an aspect of inverse problem.


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