Why do I get the following error: “An error occurred inside the SOLVER module: The “Reference Units” defined for a material property does not match the solver unit system”?
Tagged: 14, engineering-data, General, structural-mechanics
January 25, 2023 at 7:34 amFAQParticipant
Description of issue: ========== In Workbench Mechanical, why do I get a solver error stating: “An error occurred inside the SOLVER module: The “Reference Units” defined for a material property (e.g. Anand Viscoplasticity, Creep, Viscoelastic Shift Function) does not match the solver unit system” when I use the Anand Plasticity model? I use the MPa, K, s^-1 units when defining my material in the Engineering Data Resolution: ========== Some material models are defined in such a way that there is no straightforward way to convert material coefficients from one unit system to another. For example, if a material law has a term “C1*stress^C2”, there is no direct way to convert this since one ends up with non-standard units. Consequently, the solution must be performed in the same unit system in which the coefficients of these special materials are defined. You will need to set the Solver Units to use the same unit system that you used to define your material model as described below. In this case, using the MPa, K, s^-1 means that the Solver Units will need to use the “umks” units, as opposed to the “nmm”, which is usually the default. To set the appropriate solver units: 1. Click on “Analysis Settings” 2. Look under Analysis Data Management 3. Set Solver Units to Manual 4. Select the umks units Please see the attachment for a visual representation of these steps. A full list of units used in Workbench can be found in the help documentation using the following path: // Mechanical User’s Guide // Features // Solving Overview // Solving Units
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.
- The warning message is: “The maximum contact stiffness is too big. This may affect the accuracy of the results.” Why does large contact stiffness affect results accuracy?
- Contact Definitions in ANSYS Workbench Mechanical
- After Workbench crashes, how can I recover the project from a .mechdb file?
- Model has a large number of contacts – how to reduce them?
- How to resolve “Error: Invalid Geometry”?
- How to deal with “”Problem terminated — energy error too large””?”
- How to display the color of each body based on the material in Mechanical?
- The LS-DYNA equivalent of *MODEL_CHANGE card (in ABAQUS). Which keywords can be used to introduce(activate)/delete(deactivate) elements in the middle of a calculation (at user-specific time/load steps).
- How to locate an element of a particular ID number in Mechanical?
- Please explain the warning message “coefficient ratio exceeds 10e8” ?
© 2023 Copyright ANSYS, Inc. All rights reserved.