COMBINATION OF MODIFIED YLD2000-2D AND YLD2000-2D IN ANISOTROPIC PRESSURE DEPENDENT SHEET METALS

Authors

  • FARZAD MOAYYEDIAN PH. D. STUDENT OF SOLID MECHANICAL ENGINEERING IN FERDOWSI UNIVERSITY OF MASHHAD, IRAN. FACULTY MEMBER OF DEPARTMENT OF MECHANICAL ENGINEERING IN EQBAL LAHOURI INSTITUTION OF HIGHER EDUCATION
  • MEHRAN KADKHODAYAN PROFESSOR OF SOLID MECHANICAL ENGINEERING IN FERDOWSI UNIVERSITY OF MASHHAD, IRAN.

Keywords:

YLD2000-2D, MODIFIED YLD2000-2D, ANISOTROPIC ASYMMETRIC YIELD FUNCTIONS, NON-ASSOCIATED FLOW RULE, DOWNHILL SIMPLEX METHOD.

Abstract

IN THE CURRENT RESEARCH TO MODEL ANISOTROPIC ASYMMETRIC METALS, MODIFIED YLD2000-2D AS A YIELD FUNCTION AND YLD2000-2D AS A PLASTIC POTENTIAL ARE CONSIDERED AND CONSEQUENTLY A NON-ASSOCIATED FLOW RULE (NAFR) IS EMPLOYED. THE MODIFIED YLD2000-2D WHICH IS AS AN ASYMMETRIC ANISOTROPIC YIELD FUNCTION CALIBRATED WITH TEN STRESS EXPERIMENTAL DATA POINTS SUCH AS UNIAXIAL TENSILE YIELD STRESSES  IN , , , UNIAXIAL COMPRESSIVE YIELD STRESSES  IN , , , , ,  FROM THE ROLLING DIRECTION ALONG WITH BIAXIAL YIELD STRESS,  AND YLD2000-2D WHICH IS AN ANISOTROPIC SYMMETRIC YIELD FUNCTION CALIBRATED WITH EIGHT     EXPERIMENTAL DATA POINTS SUCH AS R-VALUES  IN , , , , , ,  FROM THE ROLLING DIRECTION AND ALSO BIAXIAL TENSILE R-VALUE . FINALLY COMPARED TO EXPERIMENTAL RESULTS IT IS SHOWN THAT THE PRESENTED NAFR CRITERION PREDICTS , , AND  BETTER THAN MODIFIED YLD2000-2D FOR AL2008-T4 (A BCC MATERIAL) AND AL2090-T3 (A FCC MATERIAL).

Author Biographies

FARZAD MOAYYEDIAN, PH. D. STUDENT OF SOLID MECHANICAL ENGINEERING IN FERDOWSI UNIVERSITY OF MASHHAD, IRAN. FACULTY MEMBER OF DEPARTMENT OF MECHANICAL ENGINEERING IN EQBAL LAHOURI INSTITUTION OF HIGHER EDUCATION

DEPARTMENT OF MECHANICAL ENGINEERING, SOLID MECHANICS, PH. D. STUDENT

MEHRAN KADKHODAYAN, PROFESSOR OF SOLID MECHANICAL ENGINEERING IN FERDOWSI UNIVERSITY OF MASHHAD, IRAN.

DEPARTMENT OF MECHANICAL ENGINEERING, PROFESSOR OF SOLID MECHANICS

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Published

2015-01-22

Issue

Vol 12, No 01 (2015)

Section

Articles

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