Short Edge Margin: Is 1.36D Sufficient to Prevent Shear-Out?

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SUMMARY

The discussion centers on the adequacy of a short edge margin of 1.36D in preventing shear-out failure in bolted aluminum joints. The participants confirm that with sufficient bearing strength, bearing failure will occur before shear tear-out failure. The consensus is that a margin of 1.36D is acceptable given that the bearing strength significantly exceeds the shear tear-out threshold, thus alleviating concerns regarding shear-out failure in this specific scenario.

PREREQUISITES
  • Understanding of bolted joint design principles
  • Knowledge of shear and bearing failure mechanisms
  • Familiarity with aluminum material properties
  • Basic concepts of edge margin calculations in structural engineering
NEXT STEPS
  • Research bolted joint design standards and guidelines
  • Learn about shear and bearing failure analysis techniques
  • Explore material properties of aluminum alloys relevant to structural applications
  • Investigate edge margin calculations and their implications in joint design
USEFUL FOR

Structural engineers, mechanical engineers, and anyone involved in the design and analysis of bolted aluminum joints will benefit from this discussion.

har_rai
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Hello All,
I have short edge margin condition of 1.36D on one of the part.Actually 3 parts of aluminum are joined together by bolts and one part has short edge margin.

All the parts have sufficient bearing strength.So if I understand right bearing failure occurs before shear-tear-out-failure.So if this is right then is 1.36D okay to prevent shear-out as there is no bearing failure due to sufficient bearing strength?

Thanks
 
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Hi
If somebody is confused I just want to say that my bearing allowable is much higher than shear tear out so I think I shouldn't be worried for shear-tear out failure even though it is 1.3 D<2D.

Am I right in this?

And is shear tear out always occur after bearing failure?

Thanks
 

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