When added: Exterior interfaces.
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When Selected Interfaces is selected.
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For Force per unit area, the traction components are given explicitly.
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For Total force, COMSOL Multiphysics then divides the total force by the area of the boundaries where the load is active. Then it is applied in the same way as for a Force per unit area. When working with curved boundaries or local coordinate systems, use this option carefully, as the result is not always intuitive.
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For Pressure, a scalar input is given, and the orientation of the load is along the direction of the shell boundary normal. The sign convention is such that for a positive value of the pressure, the load acts towards the shell, when considered as a solid object. Thus, the orientation of the load is flipped if it is moved from the top side to the bottom side
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FA
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N/m2
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Ftot
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