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Home / Technical Notes / Electric analysis / Thickness of Sheet Body in 2D Analysis
Thickness of Sheet Body in 2D Analysis
It is assumed that there is no change in thickness in 2D analysis.
Femtet, however, performs the simulation taking into account the thickness, so please make sure to set the thickness.
If the thickness is not specified, the default setting will be 1, and you need to translate the results and settings yourself.
The details are explained below.
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Analysis Domain |
Notes |
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Electric Analysis |
Capacitance If the default setting is not changed, the capacitance C0 is calculated with the thickness of 1. If in fact the thickness is W, you need to translate the capacitance C1 to C0*W. If the thickness is specified, Femtet outputs the capacitance C1 with the specified thickness taken into account. The setting of thickness affects the calculation similarly.
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Stress analysis Piezoelectric analysis |
Example 1: "Lumped load" boundary condition Since the material stiffness depends on its thickness, the results will vary depending on the thickness. (Loads are treated as if they are distributed evenly in the direction of thickness.) For example, the displacement will decrease if the thickness of the material increases while the lumped load remains constant.
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Example 2: Plates of different thicknesses Although this analysis should be performed in 3D space, it can be done in simplified 3D space. Note that the results would not be as accurate as 3D if the thicknesses change substantially because the shapes at contact are not taken into account.
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Thermal analysis |
Heat Quantity The thickness has to be specified to use the heat quantity. If the default thickness is used, the heat quantity per thickness must be set. |
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Magnetic analysis |
Inductance If the default setting is not changed, the capacitance L0 is calculated with the thickness of 1. If in fact the length of coil is W, the actual inductance L1 is L0*W. If the thickness is specified, Femtet outputs the inductance L1 with the specified thickness taken into account. The same case is for energy and electromagnetic force. |
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Electromagnetic analysis |
Resonant analysis The electromagnetic field strength decreases if the thickness of the material increases because it is normalized by the specified input energy of electromagnetic field.
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Fluid Analysis |
Output of volumetric flow rate and force on the wall face The volumetric flow rate [m3/s] is calculated by the inflow velocity [m/s] x the cross sectional area [m2]. The force on the wall face [N] is calculated by the stress on the wall [Pa] x the cross sectional area [m2]. The cross sectional area is calculated by the edge length [m] x the thickness [m]. |