Place and evaluate strain gages

Place a strain gage

1. In the Simulation Navigator, right-click the Strain Gages node (under the Response Dynamics solution process node) and choose New Strain Gage. Or choose Response Dynamics tab→Response Dynamics group→Strain Gage .

2. From the Type list, select the type of strain gage to place. See the Strain gages for a description of each type.

3. In the name box, type a descriptive name for the strain gage. This name identifies the strain gage in the Simulation Navigator.

4. Under Placement, choose the method for placing the strain gage. You can place a strain gage on a Node or at an Element Face Center.

5. For 2D elements, under Location, choose whether the strain gage is located on the Top or Bottom face of the element. This selection is required even if you are placing the strain gage on a node because the software needs to know which stress or strain value to use at the node point.

6. Select one or more nodes or elements on the model where you want to place strain gages. When you select a location, a graphical symbol appears on the model that shows you the orientation of the gage, including the local X-axis of the gage, the gage plane (the dashed triangle), and the normal direction to the gage plane. You can change this initial orientation in the next step.

7. Under Orientation, choose the method for determining how the strain gage is oriented on the node or element. You are defining the plane of the gage relative to the surface on which you are placing it. Face Plane — Determines the gage plane automatically. For nodal locations, the software creates the plane normal to the Z direction at the node location. For elemental locations, the software places the plane at the average plane of the element face.CSYS — Lets you define the gage plane orientation using the standard CSYS definition tools.

8. Under Rotation Angle, you can enter an angle (in degrees) by which the strain gage will be rotated about the gage plane normal.Note: The strain gage preview graphic does not reflect the new orientation when you enter a rotation angle. The preview of the new orientation is updated in the graphics window if you click in another area of the dialog box.

9. Click OK.The location of the strain gage is indicated on the model with a graphical symbol.Note: To change the size of the strain gage symbol, right-click the strain gage object in the Simulation Navigator and choose Style. In the RS Edit Display dialog box, drag the Scale slider to change the symbol size.

Evaluate a strain gage

Note:

You must create an event and excitation before you can evaluate strain gages.

1. In the Simulation Navigator, right-click the active event node and choose Evaluate for Strain Gages. Or choose Response Dynamics tab→Response Dynamics group→Evaluate Strain Gages .

2. In the graphics window, select the strain gage(s) to evaluate. Or, choose List Selection in the Evaluate Strain Gages dialog box and select the strain gages from the list.

3. In the Evaluate Strain Gages dialog box, in the Response Request group, choose the data component to specify the direction for the evaluation (in the strain gage local coordinate system). The strain gage icon identifies Leg1 with an arrow. Moving clockwise, Leg2 is the next leg, and then Leg3. The arrow also identifies the X direction. For more information about data components, see Vector and tensor components and invariants.

4. Under Output Setting, select the method for displaying and/or storing the generated response function. Store to AFU — Saves the generated response function(s) to an AFU file. The AFU file is created automatically with the same name as your simulation file, in the working directory where your simulation file is located.XY Graphing — Plots the response function as an XY graph in the graphics window.

5. If you selected Store to AFU, type a prefix in the Record Name Prefix box to identify this function record in the AFU file.

6. Click OK. The software generates a response function for each strain gage. The response functions appear under the Response Functions node, under the event node in the Simulation Navigator. Transient_Event_1 Excitations Excitation_1 Modal Response Response Functions StrainGage_1_15_(9999XX) StrainGage_2_16(1234ELM_XY)

7. To plot a strain gage response function, double-click the function name (for example, StrainGage_1_15_(9999XX) in the example above) under the Response Functions node.

How do I

Modify the display of sensors and strain gages

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Strain gages

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Place and evaluate strain gages, Simcenter 3D 2021.1 Series

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