Shear stress on bolts (in different planes)

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SUMMARY

The discussion centers on the behavior of bolts subjected to shear forces in different planes. When shear force acts on bolts in two different planes simultaneously, each bolt shares the shear force equally (F/2) if the system is perfectly symmetrical. It is emphasized that bolts do not support shear on the shank; instead, shear is transmitted through friction in the joint. Proper calculations should ensure that the bolt shank does not contact the edges of the hole, maintaining the integrity of the joint.

PREREQUISITES
  • Understanding of shear force distribution in structural engineering
  • Knowledge of bolt mechanics and joint friction
  • Familiarity with bolt pattern design and symmetry in load-bearing applications
  • Basic principles of load calculations in mechanical systems
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  • Research "Shear force distribution in bolted joints" for deeper insights
  • Study "Friction in mechanical joints" to understand load transfer mechanisms
  • Explore "Bolt pattern design for symmetrical load applications" for practical applications
  • Learn about "Calculating shear loads on bolt shanks" to ensure structural integrity
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Structural engineers, mechanical engineers, and anyone involved in the design and analysis of bolted connections in load-bearing applications.

sathishlmw
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I am trying to understand the behavior of bolt in different
plane.

My doubt is when shear force acts on bolts in 2 different
plane simultaneously, does it share the shear force (F/2) or
each bolts experience the total force (F).

I am sure that if there is a bolt pattern on the same plane,
each bolt will contribute (develop individual reaction shear force).

Please find the attachment.
 

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  • shear_force_doubt.JPG
    shear_force_doubt.JPG
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What you have drawn looks like a rod through a block. In this case, assuming perfect symmetry, the shear on each side should be F/2 assuming that each end is supported in the same manner.

It really is not a bolt problem because bolts don't support shear on the bolt shank, but rather the shear is carried on friction in the joint. It is common to calculate bolts to see if the shank section will support the shear load, but the bolt shank should not even touch the edges of the hole.
 
Dr.D said:
What you have drawn looks like a rod through a block. In this case, assuming perfect symmetry, the shear on each side should be F/2 assuming that each end is supported in the same manner.

It really is not a bolt problem because bolts don't support shear on the bolt shank, but rather the shear is carried on friction in the joint. It is common to calculate bolts to see if the shank section will support the shear load, but the bolt shank should not even touch the edges of the hole.

Thank you Dr.D. I got it.
 

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