Beam properties

Beam length

Configuring the length of the beam is done in the same way that load values are specified. The beam visualization in the main Xtruct page shows labels for different length specifications. One of these labels represents the length of the beam. Adjusting the length of the beam is as easy as tapping this label and then specifying a new value.

  1. Locate the beam length tags at both ends of the beam in the home screen.
  2. Tap the one of the beam length tags.
  3. Specify the desired value and units to be used using the numpad.
  4. Press the button in the top-left corner to apply the value and go back to the home screen.
  5. Remember: Before leaving the numpad screen, you may shake your device to undo your changes to the beam length value.

Moment of inertia (beam geometry)

The beam's moment of inertia is a function of the beam's cross-section geometry. Thus, there are two different ways to specify the moment of inertia value that is needed to compute beam deflection:

Option 1: Specify value directly

  1. Tap on the top bar of the home screen to go to the geometry and material screen

  2. Tap on the row for moment of inertia.

  3. Specify a value by using the numpad.

  4. Remember: Before leaving the numpad screen, you may shake your device to undo your changes to the moment of inertia value.

  5. Return to the home screen by pressing the and buttons.

Option 2: Select a cross-section from library

When a cross-section is selected from the library, the moment of inertia for that material is automatically imported from the built-in cross-section library.

Note: Selecting a cross-section from the library is equivalent to specifying its moment of inertia value directly using Option 1 above.

  1. Tap on the top bar of the home screen to go to the geometry and material screen

  2. Tap on the row for moment of inertia.

  3. Select a cross-section from the cross-section library.

  4. In the cross-section details screen, additional details for the selected cross-section will be displayed.

  5. Optional: You may rotate the selected cross-section by pressing the or buttons. You can also rotate the selected-cross section by pressing on one of the rows with moment of inertia values.

  6. Click on the Use this cross-section button to use the section's moment of inertia value for all calculations.

  7. You will be taken back to the geometry and material screen. You may return to the home screen by pressing the button.

  8. Optionally, you can adjust the moment of inertia value further using Option 1 above. If you do, the new moment of inertia will override the value from the library, and the name of the cross-section that was specified will be reset.

Note: The cross section of the beam will change to match the specified cross section. The actual proportions of the beam relative to its cross section are exaggerated for visual effect and are not meant to be a reflection of the relative proportions of the beam dimensions.

Elastic modulus (beam material)

There are two different ways to specify the elastic modulus of a beam:

  1. By providing a specific elastic modulus value
  2. By selecting a material from the built-in library

Option 1: Specify value directly

  1. Tap on the top bar of the home screen to go to the geometry and material screen

  2. Tap on the row for elastic modulus.

  3. Specify a value by using the numpad.

  4. Remember: Before leaving the numpad screen, you may shake your device to undo your changes to the elastic modulus value.

  5. Return to the home screen by pressing the and buttons.

Option 2: Select material from library

When a beam material is specified, the elastic modulus for that material is automatically imported from the built-in material library.

Note: Selecting a material from the library is equivalent to specifying its elastic modulus value directly using Option 1 above.

  1. Tap on the top bar of the home screen to go to the geometry and material screen

  2. Tap on the row for elastic modulus.

  3. Select a material from the list.

  4. You will be taken back to the geometry and material screen. You may return to the home screen by pressing the button.

  5. Optionally, you can adjust the elastic modulus value further using Option 1 above. If you do, the new elastic modulus will override the value from the material library, and the name of the material that was specified will be reset.

Note: The color of the beam may change depending on the material that was specified. The color used for each material is not meant to be an accurate representation of the real color of each material.

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