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  1. andrewkeisler

    Local stress around bolted surfaces vs. fatigue life

    Below I've attached a photo showing the whole scope of things. The 3 blue areas are the fixtures based on the axis allowance of movement based on the suspension design. My fixture and load method are identical to how FSAE teams apply loads and fixtures to their uprights. The difference is-...
  2. andrewkeisler

    Local stress around bolted surfaces vs. fatigue life

    Hello folks, I'm running into an issue using fasteners in Solidworks FEA- specifically bolting a hub assembly to the upright. When I noticed excessive stress around and under the bolt head surface, I decided to run a simple study with tried and true components- A C5 corvette hub and upright vs...
  3. andrewkeisler

    FEA fastener advice for an upright

    je suis charlie, I appreciate the reply. I went down a rabbit hole last night reading about the misguided affects of local stress around bolted surfaces. I'll post in the FEA forum for some added advice. https://www.eng-tips.com/viewthread.cfm?qid=237265...
  4. andrewkeisler

    FEA fastener advice for an upright

    Greg, I appreciate the insight. I understand the simultaneous forces aren't exactly ideal. At minimum, a 2g bump with 1.5g lat or long force should be far below yielding the upright. It's fairly common to see TT cars, corvettes included, experiencing 1.3 -1.5 g lateral acceleration with...
  5. andrewkeisler

    FEA fastener advice for an upright

    Here is a photo showing the fastener selection method- https://files.engineering.com/getfile.aspx?folder=ea32e7f9-120d-4e79-8691-2aa6d33bf81a&file=FEA3.pnghttps://files.engineering.com/getfile.aspx?folder=ea32e7f9-120d-4e79-8691-2aa6d33bf81a&file=FEA3.png
  6. andrewkeisler

    FEA fastener advice for an upright

    Hello folks, I'm running into an issue using fasteners in Solidworks FEA- specifically bolting a hub assembly to the upright. When I noticed excessive stress around and under the bolt head surface, I decided to run a simple study with tried and true components- A C5 corvette hub and upright...
  7. andrewkeisler

    I need to hollow out a part using what I would assume to be the shell feature. No luck :/

    Okay, thanks for pointing that out, I will try to get those out of the way and try again. Thank you!
  8. andrewkeisler

    I need to hollow out a part using what I would assume to be the shell feature. No luck :/

    Just like the subject says, I'm having trouble hollowing out a part with a .1 thick wall. Radius thickness isn't crucial as I am only hollowing the part to save material for 3d printing. I have tried to use the shell feature without selecting any faces and I get errors. Any help on this would be...
  9. andrewkeisler

    How to translate g force from braking into a torsional load represented in ft lb of torque.

    I am trying to calculate how much torsional load is applied to a given suspension with 1 g force of braking. Assuming the car weighs 3000 pounds and 70 percent of the braking is done with the front. That equals 1050 pounds per front wheel. I am also assuming the tire is 24 inches in diameter...
  10. andrewkeisler

    A little guidance in regards to the strength of this assembly.

    My question is in regards to the strength of the shaft around the area of the radius. Is the shaft weaker with the bolt fastened as the same diagram as one solid piece? I'm wondering if you take a weaker material, drill and thread it, throw a stronger material inside of it, does it make it...
  11. andrewkeisler

    A little guidance in regards to the strength of this assembly.

    The shaft and plate are made of 7075-t6 aluminum. The bolt is made of alloy steel (160psi min.) I assume the 7075-t6 threads would limit the amount of torque far before the screw head configuration. Is that safe to assume? I also have configured 4 smaller bolts into a circular pattern around...
  12. andrewkeisler

    A little guidance in regards to the strength of this assembly.

    Well this is a structural question, but as I scanned through the structural forum, I noticed mainly building related questions and answers. I figured I would give the mechanical forum a shot! My question is in regards to the picture attached to my post. The bolt that secures the shaft to the...
  13. andrewkeisler

    A few questions regarding solidworks simulation.

    Thanks for the replies! Sorry it has taken me awhile to get on here and attach my model, I have been finalizing a few things on it. If you wouldn't mind checking it out and giving some insite on the best possible way to simulate with yeild/ultimate strength in mind. All the peices press and bolt...
  14. andrewkeisler

    A few simulation questions..

    Running a static simulation, using a force, and showing von mises results (or any other kind that I have tried) the von mises PSI barely changes when selecting different materials. Say 6061t6 and then running 7075t6 the PSI difference is a few percent at best. In my mind, the difference should...
  15. andrewkeisler

    A few questions regarding solidworks simulation.

    Running a static simulation, using a force, and showing von mises results (or any other kind that I have tried) the von mises PSI barely changes when selecting different materials. Say 6061t6 and then running 7075t6 the PSI difference is a few percent at best. In my mind, the difference should...
  16. andrewkeisler

    creating a solid body from surface

    Wow, thanks for the help guys. That was easy enough! I'm new to solidworks but pretty darn efficient in cad/cam programs such as mastercam. Solidworks is kicking my butt as of now!
  17. andrewkeisler

    creating a solid body from surface

    How about this! It didn't make the part but it seems to be that it was already knitted togeather.http://files.engineering.com/getfile.aspx?folder=bd317214-1a73-4370-8c07-c9d84ac1df20&file=Mazda_MX5_Miata_front_upright1.STEP
  18. andrewkeisler

    creating a solid body from surface

    Well sorry about that. I thought I had attached my solidworks part file... which I cannot figure out how to do. Can you shoot me your email in a PM and let me send you the file?
  19. andrewkeisler

    creating a solid body from surface

    I have tried the thicken feature with no luck :( . Can anyone help? Thanks, Andrew

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