Are there any tips for enhancing the convergence of a highly compressible foam with nonlinear contact against a rigid body? The Newton-Raphson force residual does not converge. Also, the contact agains the rigid body is over penetrating.
January 25, 2023 at 7:34 amFAQParticipant
In one particular application involving highly compressible ogden-foam with nonlinear contact, the Newton-Raphson force residual did not converge. Also, the penalty based contact produced a very low default stiffness value that caused over penetration. A few changes lead to converged solution with acceptable results. 1. Override the default Newton-Raphson force convergence tolerance with a fixed value. The default calculation was varying wildly. 2. Use Asymmetric Contact with Normal Lagrange Formulation and a generous Pinball Radius. The Lagrange formulation is often more challenging to converge, but in this partcular case, where the underlying material was so soft, Normal Lagrange actually proved to be much more stable. 3. Switch to lower order elements for added stability.
Introducing Ansys Electronics Desktop on Ansys Cloud
The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...
How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)
This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...
Introducing the GEKO Turbulence Model in Ansys Fluent
The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...
Postprocessing on Ansys EnSight
This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.
- ANSYS Mechanical: Fatigue Crack Growth Analysis using SMART Crack Growth
- Does ECAD trace mapping support more than one type of trace material (usually copper) in the same layer?
- How can I understand Beam Probe results?
- Can the contact type (bonded or frictional) affect thermal results?
- Which time integration scheme is used in transient thermal analysis and how to change the scheme?
- Why there is difference in contact status between two load steps during Bolt Pretension? LS1: Bolt is Loaded LS2: Pretension is locked
- How to define frictional coefficient as a function of relative sliding velocity
- Static Structural Analysis of a Rear Upright – Part 1
- Modeling Radiative Heat Transfer
- What is pinball radius and does mesh size effect this value?
© 2023 Copyright ANSYS, Inc. All rights reserved.