Free body diagram on moment and torsion

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SUMMARY

The discussion centers on the analysis of free body diagrams in the context of moment and torsion, specifically regarding the transfer of forces between a rectangular block and a T-block in two different cases. In Case 1, the object is fastened on the x-z plane, while in Case 2, the forces are directly applied to the block. It is concluded that the forces are not directly applied to the block in Case 1, and the forces acting on the block depend on the fasteners used. The type of forces exerted by the fasteners, such as socket head cap screws, primarily create compressive forces, which may not transmit g-forces from vibration to the block.

PREREQUISITES
  • Understanding of free body diagrams
  • Knowledge of static equilibrium equations
  • Familiarity with fasteners and their force transmission characteristics
  • Basic principles of moment and torsion in mechanical systems
NEXT STEPS
  • Study the principles of static equilibrium in mechanical systems
  • Learn about the effects of different types of fasteners on force transmission
  • Explore the concept of moment and torsion in engineering applications
  • Investigate the behavior of structures under dynamic loads, such as vibrations
USEFUL FOR

Mechanical engineers, students studying statics and dynamics, and professionals involved in structural analysis and design will benefit from this discussion.

marvincwl
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Homework Statement


It's not exactly a homework question, just want to see if i have the right concept in drawing free body diagrams

See attached Picture.
In case 1, the object is fastened on plane x-z and the rectangular block is fastened to the T-block in y-z plane.

Will the force be transferred to the block as it is in case 2?

Homework Equations


nil


The Attempt at a Solution



see attached picture. I think My1 would not be created?


Thanks a lot. Help is much appreciated.
 

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marvincwl said:
See attached Picture.
In case 1, the object is fastened on plane x-z and the rectangular block is fastened to the T-block in y-z plane.

Will the force be transferred to the block as it is in case 2?

No (I assume the forces are not directly applied to the block in case 1). The forces that exist between the block and the rest of the frame occur at the fasteners and the type of forces depends on what type of forces the fastener can exert. So if you break the block and frame apart, you would model the forces on the block as the forces exerted by the fasteners. Whether some component of the those external forces transmit to the block can be found out from the static equations.
 
aralbrec said:
No (I assume the forces are not directly applied to the block in case 1). The forces that exist between the block and the rest of the frame occur at the fasteners and the type of forces depends on what type of forces the fastener can exert. So if you break the block and frame apart, you would model the forces on the block as the forces exerted by the fasteners. Whether some component of the those external forces transmit to the block can be found out from the static equations.

If this is fastened in a random vibration machine and the fasteners used are socket head cap screws?

The fasteners will only create a compressive force at the threads and at the contact of the cap and the block? so the g-force from the vibration is not transferred??!
 

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