# Clamp force/tensile force due to torque consideration.

• 11-20-2015, 03:31 AM
enotyphoon
Clamp force/tensile force due to torque consideration.
Hi,
I have calculate the clamp force, which mean that the tensile force acting on bolt when it clamped 2 or more surface together. Since the value of tensile force calculated is significantly higher. so I can't ignore it.

If a box fastened by bolts and the box experiencing forward/upward/downward acceleration on its c.g, does the reaction forces on y-axis of each bolt should be added or minus with the clamp/tensile force of the bolt?
• 11-20-2015, 10:11 AM
JAlberts
All exetrnal forces that create bolt tension and shearing should be evaluated.
• 11-20-2015, 07:09 PM
Kelly_Bramble
See:

[B][URL="http://www.engineersedge.com/torque.htm"]Bolt Torque Axial Force Calculator and Equation[/URL]

• 11-20-2015, 10:11 PM
enotyphoon
is that mean, when my bolt is subjected to tensile force due to external force(e.g: object is having upward/downward acceleration), i have to add/minus the Clamp force with the reaction force on bolt due to upward acceleration;

Fc=clamp/tensile force due to tightening
Ac=reaction force due to upward/downward acceleration of object

Rc=Total reaction force acting in Y direction of the Bolt

Rc= Ac +_ Fc

is this correct?
• 11-20-2015, 10:12 PM
enotyphoon
thanks for the source :cool: