r7.01.13 Law CJS in geomechanics

Summary:

Here we present law CJS, which applies to soil mechanics. We specify:

• the description of the model,

the integration of the law in*Code_Aster,

• the description of the routines introduced.

• 1. Notations
• 2. Introduction
• 3. Description of law CJS
  • 3.1. Partition of deformations
  • 3.2. Elastic mechanism
  • 3.3. Isotropic plastic mechanism
  • 3.4. Deviatory plastic mechanism
  • 3.5. Model prioritization
• 4. Integration of the CJS law
  • 4.1. Choice of internal variables
  • 4.2. Integration of the nonlinear elastic mechanism
  • 4.3. Integration of nonlinear elastic and isotropic plastic mechanisms
  • 4.4. Integration of nonlinear elastic and deviatory plastic mechanisms
  • 4.5. Integration of nonlinear elastic, isotropic plastic and deviatory plastic mechanisms
  • 4.6. Relaxation procedure based on an estimate of the normals at the deviatory load surface
  • 4.7. Redistribution of the time step
  • 4.8. Various remarks
• 5. Tangent operator
  • 5.1. Tangent operator of the nonlinear elastic mechanism
  • 5.2. Tangent operator of isotropic elastic and plastic mechanisms
  • 5.3. Tangent operator of elastic and plastic deviatory mechanisms
  • 5.4. Tangent operator of elastic, plastic, isotropic and deviatory mechanisms
• 6. Aster Springs
  • 6.1. List of routines changed and added
  • 6.2. General flow chart of the main routines
  • 6.3. Details of the functionalities of the FORTRAN routines developed
• 7. Bibliography
• 8. Features and verification
• 9. Description of document versions