ANSYS Reaction Forces: How to Use for Calculating Bolt Forces

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Reaction forces at the mounting holes in a static structural analysis can be used to determine the forces acting on mounting bolts. The axial force along the bolt's direction indicates the tensile force, while the resultant of the other two directions provides the shear force. However, this approach is valid only if the bolts are sufficiently stiff compared to the structure. If the bolts are flexible, load redistribution occurs, necessitating their inclusion in the finite element model. The significance of these factors also varies based on the safety factors employed in the design.
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Hello,

Can the reaction forces at the mounting (fixed) holes of a component in a static structural analysis be used directly to find out the forces acting on the mounting bolts?

If my understanding is correct, the force in the direction in the axis of the bolt will be used to find the tensile force, and the resultant of the other 2 directions will be used for finding out the shear force acting on the bolt.

Any help on this is much appreciated...

Thank you
 
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That is correct, provided the bolts are stiff relative to the structure.

Otherwise, the flexibility of the bolts themselves will redistribute the loads, and you may need to include the bolts in the FE model.

How important this is also depends on what safety factors are included in your design procedures, of course.
 

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