Lemaitre–Chaboche Viscoplastic Model
Application ID: 41971
Most metals and alloys undergo viscoplastic deformation at high temperatures. In case of cyclic loading, a constitutive law with both isotropic and kinematic hardening is necessary to describe effects such as ratcheting, cyclic softening/hardening, and stress relaxation.
The Lemaitre–Chaboche viscoplastic model combines isotropic hardening with nonlinear kinematic hardening to model these effects. This viscoplastic model is commonly used in areas such as additive manufacturing, laser welding, laser cutting, and thermal processing of metals and alloys at high temperatures. The tutorial model demonstrates the Lemaitre–Chaboche viscoplastic constitutive law on a test specimen.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
- COMSOL Multiphysics® and
- Nonlinear Structural Materials Module and
- either the MEMS Module, or Structural Mechanics Module
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.