v6.02.117 SSNL117 - Elastoplasticity flexure elbow

Summary:

This test validates the modeling of ovalization phenomena in pipes in the elastoplastic field with elements TUYAU: an elbow, extended by straight pipes, is subjected to bending in its plane. The pipe is thick (of dimensions similar to the bends of the primary circuits). The reference solution is numerical: it is obtained with Code_Aster using a \(\mathrm{3D}\) elbow mesh (C modeling).

The first two models make it possible to validate elements TUYAU (with straight and angled elements at 3 knots for modeling A and elements straight and angled at 4 knots for modeling B) in elastoplasticity.

In the B and C models, a « global » rotation term, developed by EDF, CEA and FRAMATOME [bib2], developed by, and [], for seismic pipes, is introduced via a Python macro command.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
  • 1.4. Initial conditions
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
  • 2.3. Precision on the reference results
  • 2.4. Bibliographical references
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested sizes and results
• 4. B modeling
  • 4.1. Characteristics of modeling
  • 4.2. Characteristics of the mesh
  • 4.3. Calculation of the « Global » Rotation term
  • 4.4. Tested sizes and results
• 5. C modeling
  • 5.1. Characteristics of modeling
  • 5.2. Characteristics of the mesh
  • 5.3. Tested sizes and results
• 6. Summary of results