Tension Clip Yield Allowable Stress
Tension Clip Yield Allowable Stress
(OP)
When calculating the tension allowable on an extruded angle clip and for Ultimate conditions I often use the Lockheed graphs and the Niu angle bathtub fittings where applicable. However these are all for Ultimate conditions (test data) and give much more allowable tension load than just comparing to the My/I using the Plastic Bending allowable- Fbu. My question is this: For yield conditions, is there a similar correlation like the graphs that would give one more allowable load than Fby would yield?





RE: Tension Clip Yield Allowable Stress
RE: Tension Clip Yield Allowable Stress
This suggests that the yield values are the graph values divided by 1.5.
RE: Tension Clip Yield Allowable Stress
If you accept the Lockheed definition of limit allowable being that which gives 0.005" permanent offset then Lockheed gives you the limit capability (just divide by 1.5). So many people use this method that its definition of limit capability could be considered a de facto standard.
Flabel has the same graphs but he gets into fastener prying which Lockheed ignores (the Lockheed SM 89 sketches show P at the bolt the same as P at the flange).