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StructuralLoadsCreatingTemperatureLoadsLecture

CreatingTemperatureLoads.mp3

Creating Temperature Loads

Temperature Loads simulate the effect of varying temperatures.

Temperature Loads

Temperature driven expansion/ contraction Coefficient of Thermal Expansion Stress/strain due to expansion/contraction

Temperature Load Types

Global Mechanica Thermal External

Definition Requirements

Reference Temperature Global

o Model Temperature Mechanica Thermal

o Prev. Design Study (optional), Analysis, Load Set(s) External

o FNF file, Coordinate System

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Global Temperature Load applied to a brake caliperLectureNotes

Temperature Loads

Temperature can affect materials in a number of different ways. The coefficient ofthermal expansion is a material property that predicts expansion or contraction of amaterial when the temperature changes. In addition, Mechanica enables users tocreate materials with temperature-dependent material properties.

Temperature Load Types

There are three different types of Temperature Loads you can apply:

Global Temperature Load: Specifies a model temperature for the entire model. Mechanica Thermal Temperature Loads: Use the results of a Mechanica Thermal

analysis to apply a temperature field on the model.

External Temperature Loads: Import a PTC Finite Element Neutral File (FNF)that contains temperature field information for the model.

Temperature Load Definition

The following information must be supplied when defining Temperature Loads:

Reference Temperature: All Temperature Load definitions require thespecification of a reference temperature. The reference temperature representsthe zero stress temperature of your model.

Global Temperature Loads: Global Temperature Loads require the designation ofthe desired Model Temperature you wish to bring the model to.

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Mechanica Thermal Temperature Loads: Mechanica Thermal Temperature Loadsrequires the specification of an Design Study (optional), Analysis, and LoadSet(s).

External Temperature Loads: External Temperature Loads require thespecification of a Coordinate System and a PTC Finite Element Neutral File(.FNF) to load.

Best Practices

Different materials have different coefficients of thermal expansion. If a model hasdifferent materials, a temperature load could be useful in determining if a rise or dropin temperature could place additional stress on the model.

The temperature load is applied to the entire model. If it is desired that a specific

assembly component not be affected by temperature, then the material assigned to it

must have a coefficient of thermal expansion equal to zero.

CreatingTemperatureLoadsDemonstrationCreatingTemperatureLoads_demo.mp4

CreatingTemperatureLoadsPrcedureProcedure: Creating Temperature Loads

ScenarioSubject a brake component to a 115C Global Temperature Load.

TempLoad brake_caliper.prt

Task 1. Open the Mechanica application and create a Global Temperature Load.

1. Click Applications > Mechanica.

2. Verify that the Model Type is set to Structure and click OK.

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3. Click Global Temperature Load from the Mechanica toolbar.

4. Type 115 in the Model Temperature field. Verify that the Reference Temperature is0 and both unit fields are set to C.

The above Global Temperature definition will apply a temperature difference

of 115 Celsius to the model.

5. The dialog box should now appear as shown in the figure. Click OK to create theGlobal Temperature Load and close the dialog box.

6. The model should appear with the Global Temperature Load icon as shown in thefigure.

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Task 2. Save the model and erase it from memory.

1. Return to the Standard Pro/ENGINEER mode by clicking Applications > Standard.

2. Click Save from the main toolbar and click OK to save the model.

3. Click File > Erase > Current > Yes to erase the model from memory.

This completes the procedure.