Biaxial strength of HY 80 steel

Journal Article · Mon Apr 01 04:00:00 EST 1985 · J. Eng. Mater. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3225788· OSTI ID:6218183

Chan, K S; Lindholm, U S; Wise, J

The biaxial deformation behavior of HY 80 steel has been examined by testing thin wall tubes under combined axial tension and internal pressure. The effective stressstrain curves and the hardening response have been found to vary with the stress state. The plastic strain ratio at a given stress ratio deviates from the von Mises value except at the stress states near uniaxial tension, plane strain and equi-biaxial tension. Using Drucker theory, these deviations are eliminated and the resulting yield locus is in good agreement with both the Bishop-Hill theory and the experimental results. Influenced by the tube geometry, the instability strains at the onset of diffuse necking are decreased by an increase in hoop tension. The diffuse necking strains are reasonably predicted by the Swift and the LankfordSaibel/Mellor criteria.

• Research Organization: Department of Materials Sciences, Southwest Research Institute, San Antonio, Texas
• OSTI ID: 6218183
• Journal Information: J. Eng. Mater. Technol.; (United States), Journal Name: J. Eng. Mater. Technol.; (United States) Vol. 107:2; ISSN JEMTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AXIAL SYMMETRY
CALCULATION METHODS
DEFORMATION
DESTRUCTIVE TESTING
DIFFUSION
FUNCTIONS
HARDENING
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
PLASTICITY
RESPONSE FUNCTIONS
STEELS
STRAIN RATE
STRESS ANALYSIS
STRESS INTENSITY FACTORS
SYMMETRY
TENSILE PROPERTIES
TESTING
TUBES