Constitutive modeling of metals under nonproportional cyclic loading

Journal Article · Mon Dec 31 23:00:00 EST 1990 · Journal of Engineering Materials and Technology; (United States)

DOI:https://doi.org/10.1115/1.2903379· OSTI ID:6955962

Doong, S H; Socie, D F ^[1]

---

1. Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering

A two-surface kinematic hardening model for the stress-strain response of metals under nonproportional tension-torsion cyclic loading is developed and verified with critical experiments. In this model, both the yield and limit surfaces are assumed to be ellipses in the two-dimensional stress plane to account for anisotropic cyclic hardening. Areas of the yield and limit surfaces are changed in order to model the overall isotropic cyclic hardening (or softening) behavior. The strength anisotropy is modeled by changing the ellipticity and orientation of the elliptical surfaces with respect to the stress axes. A nonproportionality parameter based on the plastic strain history is developed to estimate the cyclic hardening level under nonproportional loading. It is shown that this model is able to model a number of important deformation features of metals under complex nonproportional cyclic loading.

• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6955962
• Journal Information: Journal of Engineering Materials and Technology; (United States), Journal Name: Journal of Engineering Materials and Technology; (United States) Vol. 113; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
COMPUTERIZED SIMULATION
DATA
EQUATIONS
EXPERIMENTAL DATA
HARDENING
HIGH ALLOY STEELS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NUMERICAL DATA
PLASTICITY
SIMULATION
STAINLESS STEELS
STEELS
STRAIN HARDENING