Tagged: 2019 R1, mechanical, static, structural-and-thermal, structural-mechanics, thermal
-
-
January 25, 2023 at 7:34 amFAQParticipant
There are two ways of specifying CTE in Workbench Engineering Data: 1. Instantaneous (tangent) 2. Secant (average) If we plot thermal strain vs. temperature on a graph (origin represents zero thermal strain at the reference temperature), the secant CTE represents the linear slope from the reference temperature. The instantaneous CTE, however, is the slope of the curve at the temperature of interest. In practical terms, the secant CTE (“alpha”) is the measure of the thermal strain due to a change in temperature from the reference temperature to the current temperature. This value is typically used directly when we calculate thermal strains: thermal_strain = alpha * (current_temp – reference_temp) On the other hand, the instantaneous CTE represents the thermal strain generated due to an infinitesimal change in temperature around the current temperature. This quantity needs to be integrated with respect to temperature to calculate the thermal strains. The secant CTE is typically used as input for thermal expansion, but the instantaneous CTE is also available as input in Workbench Engineering Data, in case users may have material data in instantaneous CTE form. Please keep in mind that temperature-depedent secant CTE requires a reference temperature from which thermal strain is calculated. On the other hand, temperature-dependent instantaneous CTE does not require this additional information for the material definition (although a reference temperature is still needed in Mechanical to calculate thermal strains properly). Because of this reason, temperature-dependent CTE is sometimes published in instantaneous form. See Section 3.5 “Thermal Expansion” in the Material Reference of the Mechanical APDL Help for details. Also, refer to Section 2.1.3 “Temperature-Dependent Coefficient of Thermal Expansion” in the Theory Reference of the Mechanical APDL Help for information on temperature-dependent CTE.
-
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.
- What is the difference between secant and instantaneous coefficients of thermal expansion (CTE)?
- Does ECAD trace mapping support more than one type of trace material (usually copper) in the same layer?
- How to use the Newton-Raphson residuals option under Solution Information?
- How can I understand Beam Probe results?
- ANSYS Mechanical: Fatigue Crack Growth Analysis using SMART Crack Growth
- How to find total heat flowing through a surface in Mechanical?
- How to reduce contact penetration?
- How to define frictional coefficient as a function of relative sliding velocity
- Difference Between Environment Temperature and Reference Temperature in Mechanical
- How to plot stresses of a beam connection in Workbench?
© 2024 Copyright ANSYS, Inc. All rights reserved.