ORNL – Oak Ridge National Laboratory constitutive model

The Oak Ridge National Laboratory (ORNL) constitutive model:

  • allows for use of the rules defined in the Nuclear Standard NEF 9–5T, “Guidelines and Procedures for Design of Class 1 Elevated Temperature Nuclear System Components,” in plasticity and creep calculations;

  • is intended for use in modeling types 304 and 316 stainless steel at relatively high temperatures;

  • can be used only with the metal plasticity models (linear kinematic hardening only) and/or the strain hardening form of the metal creep law; and

  • is described in detail in ORNL constitutive theory.

The following topics are discussed:

Related Topics
About the material library
Inelastic behavior
Classical metal plasticity
Rate-dependent plasticity: creep and swelling
In Other Guides
*ORNL
*PLASTIC
*CREEP
Using the Oak Ridge National Laboratory (ORNL) constitutive model in plasticity and creep calculations
Specifying cycled yield stress data for the ORNL model

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