대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제15권2호
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- Pages.413-423
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- 1991
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- 1225-5963(pISSN)
DOI QR Code
전단변형에 의한 직교이방성의 변화
Evolution of Orthotropic Anisotropy by Simple Shear Deformation
초록
Multiaxial loading by combinations of tension-torsion-internal pressure have been applied to the thins-walled tubular specimens prepared from cold drawn tubes of SAE 1020 steel. Prior to the multiaxial loading, each specimen has been twisted to different shear strains. Uniaxial tensile yield stresses measured at different angles to the tube axis clearly show that the initial orthotropic symmetry is maintained during twisting. The orthotropy axes are observed to rotate with shear strains. The plane stress yield locus measured for each twisted specimens show that yield surface shape does not remain similar during twisting and thus anisotropic work hardening is not a function of only plastic work.
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