OMacS
Mechanical
- Sep 14, 2018
- 1
Hi all,
I would really appreciate some guidance on determining the minimum clamp load for a joint with more than one interface.
VDI 2230 gives the minimum clamp load to provide friction grip against shear slip as:
Fmin = (F load) / (q * C.O.F min)
Where q is the number for friction interfaces in the joint, COF min is the coefficient of friction at the interface, and F load is the transverse load. Link to exact formula provided below.
I have only found examples for single friction interface joints, where q=1 so the formula is self explanatory. But I need to assess joints with multiple friction interfaces and here I am unsure how to proceed.
The formula seems to suggest I would take the lowest COF and multiple it by the number of interfaces. But this would lead to a smaller required preload compared to a single interface joint.
Does anyone have experience on how to treat this type of joint?
Help much appreciated.
Best Regards,
Oliver
I would really appreciate some guidance on determining the minimum clamp load for a joint with more than one interface.
VDI 2230 gives the minimum clamp load to provide friction grip against shear slip as:
Fmin = (F load) / (q * C.O.F min)
Where q is the number for friction interfaces in the joint, COF min is the coefficient of friction at the interface, and F load is the transverse load. Link to exact formula provided below.
I have only found examples for single friction interface joints, where q=1 so the formula is self explanatory. But I need to assess joints with multiple friction interfaces and here I am unsure how to proceed.
The formula seems to suggest I would take the lowest COF and multiple it by the number of interfaces. But this would lead to a smaller required preload compared to a single interface joint.
Does anyone have experience on how to treat this type of joint?
Help much appreciated.
Best Regards,
Oliver
