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[mertturgut.senol]

Dear All Experts;

To a surface of a steel plate I will apply snow load 100 kg for a square meter. Should I apply it for a force 1000 N or Pressure 1000 Pa to the surface to where snow load acts?

Best regards...

[Nanda]

Hello,

In 3D analysis, Force and Pressure loads are related to each other. The major difference between force and pressure is how it is applied to the system. You can select either force or pressure as a way to excite or load the model, however, one might be easier to use and more accurate than the other depending on the model. The following video will help you understand the difference between forces and pressures. Hope this will guide you accordingly.

Understanding the Difference Between Forces and Pressures - Lesson 4 - ANSYS Innovation Courses

Regards,

Nanda.

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[Sampat Kumar]

 

 

Hi Mert41, 
As Nanda has correctly mentioned, in the 3D analysis, the force and pressure are related to each other. You can follow the link above to learn more about the basic application of force and pressure. In addition to that, the accuracy of the result and the application of force and pressure depend on the model. generally, the force will come into existence when two solid bodies are in contact, and its direction will vary along the X, Y, and Z components or in the desired direction, but the pressure will come into existence when the solid and liquid come into contact. The direction of pressure will always be normal to a solid surface.

As we can consider that the snow is uniformly distributed over the surface of the steel plate (with some slope), the weight of the snow will act vertically downward (we are considering some friction between the snow and the surface; otherwise, the snow would slide down). If you are considering a nonlinear analysis wherein the steel plate will deform, then the pressure load can change direction to adjust the direction normal to the surface, but the force will always act vertically downward. So again, the accuracy will depend upon the model, mesh size, and type of analysis (linear and non-linear) to be performed.

All the best 
Sampat Kumar

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[mertturgut.senol]

Thank you for your feedback and valuable commnets.