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Vol.25, No.11, 764 ~ 771, 1987
Title
The Measurement of Flow Behavior of the Sheet Metal Under Combined Stress States
전기찬 , W . F . Hosford Ghi Chan Jun
Abstract
Several new test procedures were tried to measure flow behavior of sheet metals under combined stress stales utilizing a normalized aluminum-killed steel which was nearly isotropic. Equibiaxial stress condition was obtained From a through-thickness compression test on a disk-slacked circular cylinder. Plane strain and pure shear conditions were obtained by plane strain compression tests, in which one of in-plane strains or the thickness strain is zero. Experimental Flow stresses of the steel were slightly higher in the equibiaxial loading path, and slightly lower in the plane-strain path than the expected values from the Mises theory. Experimental flow stresses in the pure shear path fitted well with the theoretical values.
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