T SLOT Tear out.
T SLOT Tear out.
(OP)
Howdy,
So I've tried problems like this before in FEA and have decided to change the design so I didnt have to deal with it. Well in this case I cant change it... I have to figure out the answer. I only have solidworks simulation to play with. I've tried every trick I can think of to relive the point loads but still I cannot get it to tell me that it wont fail at the point in the red circle at a bit over 110 lbs.
So the yellow block is C36000 and the grey pin block is steel 1018. The t slot is blind, keeping the pin block from sliding out. I know from pulling on these things they tear out starting right were solidworks says (in the red circle on the brass) but its a lot more than 110 lbs.
so the t slot flange dimensions are .5"x.125"x.375" and it rides in the t slot... 2 inches. The load is hug by a pin thru the hole. I've all but given up on simulations and hope that some FEA wizards who do hand calcs, know how to hand calc this one.
Thanks!
So I've tried problems like this before in FEA and have decided to change the design so I didnt have to deal with it. Well in this case I cant change it... I have to figure out the answer. I only have solidworks simulation to play with. I've tried every trick I can think of to relive the point loads but still I cannot get it to tell me that it wont fail at the point in the red circle at a bit over 110 lbs.
So the yellow block is C36000 and the grey pin block is steel 1018. The t slot is blind, keeping the pin block from sliding out. I know from pulling on these things they tear out starting right were solidworks says (in the red circle on the brass) but its a lot more than 110 lbs.
so the t slot flange dimensions are .5"x.125"x.375" and it rides in the t slot... 2 inches. The load is hug by a pin thru the hole. I've all but given up on simulations and hope that some FEA wizards who do hand calcs, know how to hand calc this one.
Thanks!





RE: T SLOT Tear out.
An alternate approach would be to include plastic yield in the material properties. This will distribute the load away from the singularity.
I hope this helps.
Rob Stupplebeen
www.optimaldevice.com
RE: T SLOT Tear out.
HTH,
Dan
Han primo incensus
RE: T SLOT Tear out.
@DanStro, I looked both at yield and ultimate. This is part of a "safety critical" component. Any permanent yield within normal working load would be considered unacceptable. I've changed the part in non-critical ways so I could show it on here, but the real part is showing a yield at 110 lbs, ultimate failure if I remember, like I said I wasn't really paying attention to it was in the 150 lbs range. Anyway, the actual part my company makes, is in service and rated for continuous use up to 400lbs. That's a long way from where I'm at in FEA.
The other part of the whole thing, there is a press condition with the brass ears under the "T" on the .375 thick steel web. Is there a way to simulate a press fit on those surfaces in solidworks? I haven't used contact sets very often.
That being said any luck on hand calcs? my copy of Roarks formulas is about 100 miles away right now... anyone see anything of the sort in there?
Thanks!
RE: T SLOT Tear out.