Countersunk Bolts, Bearing Stress
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Posted by: Aztek ®

07/14/2006, 04:48:47

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Hello, it is known that bearing stress is calculated by dividing the load by the area of the rectangle representing the projection of the bolts on the plate section. That is, the load (P) is divided by the thickness of the plate (t) times the diameter of the bolt (d)....S=P/(td)

In the application of countersunk bolts, how does this calculation change in the countersunk part of the plate? Should I take the projection of the area from drawing programs?

Thank you!





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Re: Countersunk Bolts, Bearing Stress
Re: Countersunk Bolts, Bearing Stress -- Aztek Post Reply Top of thread Forum
Posted by: stewart ®

07/14/2006, 07:54:13

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Hello

Is this a flathead screw? Is the head in the shear plane?

Stewart








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Re: Re: Countersunk Bolts, Bearing Stress
Re: Re: Countersunk Bolts, Bearing Stress -- stewart Post Reply Top of thread Forum
Posted by: Aztek ®

07/14/2006, 08:49:49

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Thank you for your response,

The head is flat (DIN 7991) and the shear plane is not on the head section but under the effect of shear load, the head section try to apply pressure to the upper plate....

Now the projected area is not t times d. In fact it is larger but what amount?





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Re: Re: Re: Countersunk Bolts, Bearing Stress
Re: Re: Re: Countersunk Bolts, Bearing Stress -- Aztek Post Reply Top of thread Forum
Posted by: stewart ®

07/18/2006, 20:31:25

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Hello Aztek

I am sorry I cannot be of more help.

Stewart








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