Uniaxial ratchetting of 316FR steel at room temperature -- Part 2. Constitutive modeling and simulation

Journal Article · Sat Jan 01 04:00:00 EST 2000 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.482762· OSTI ID:20014281

Ohno, N; Abdel-Karim, M

Uniaxial ratchetting experiments of 316FR steel at room temperature reported in Part 1 are simulated using a new kinematic hardening model which has two kinds of dynamic recovery terms. The model, which features the capability of simulating slight opening of stress-strain hysteresis loops robustly, is formulated by furnishing the Armstrong and Frederick model with the critical state of dynamic recovery introduced by Ohno and Wang (1993). The model is then combined with a viscoplastic equation, and the resulting constitutive model is applied successfully to simulating the experiments. It is shown that for ratchetting under stress cycling with negative stress ratio, viscoplasticity and slight opening of hysteresis loops are effective mainly in early and subsequent cycles, respectively, whereas for ratchetting under zero-to-tension only viscoplasticity is effective.

• Research Organization: Nagoya Univ. (JP)
• OSTI ID: 20014281
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 1 Vol. 122; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
AMBIENT TEMPERATURE
FBR TYPE REACTORS
MATHEMATICAL MODELS
PLASTICITY
RATCHETING
REACTOR MATERIALS
STAINLESS STEEL-316
STRAIN HARDENING