v6.08.103 SSND103 - Validation of a bilinear law of behavior on a discrete element (application to bolted assemblies)

Summary:

The objective of this test case is to validate a bilinear law of behavior relating to a discrete element.

This law of behavior was developed as part of a study in which the behavior of the screw in a bolted connection is modelled by a discrete element affected by the same behavior.

The law of behavior DIS_BILI_ELAS requires as arguments the two apparent stiffness of the screw (elements of the assembly in contact or not) as well as the value of the pre-tightening force imposed on the screw.

It is verified, for various temperatures and different directions of stress, that the slopes of the load curves obtained, when the discrete one is stressed, correspond to the apparent stiffness and that the slope break corresponds to the imposed pre-tightening force.

• 1. \(\stackrel{ˉ}{U}\) Benchmark problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
• 2. Benchmark solution
• 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. 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