Are the specs on 300M you list for the base material or are they heat treated numbers? If 300M is required, that's what I'll do. Per my fabricator, it will add about $100 per part. They are already pretty expensive, so if it takes an extra $100 to make it right, that's right thing to do.
The only problem with the HRC ~40 is that the listed tensile strength is right at my predicted peak stress (about 190 ksi), ie no safety factor at all. This level of stress is only reached momentarily, but may be reached many times per lap.
I studying the section, I think a 0.05" increase in...
Thanks for all the great replies. I've been without a PC for a few days so I just got a chance to read all of them.
The radius I'm using is pretty well maxed out within my space constraints. Besides, modeling shows that even doubling the radius results in only about 5% reduction is stress...
Mike,
The fracture is actually 100% on the raduis all the way around. Meaning it's completely under the spacer. No part of the fracture is at or outside the edge of the spacer.
Looking at the articles linked above, this appears to best fit the low stress riser, high bending stress example.
OK, here's a few photos of the broken part. They are big files so I hope this works.http://files.engineering.com/getfile.aspx?folder=087fc682-4a7c-4527-a7b8-181beaf4d60b&file=DSC_3942.JPG
I think what you don't see and what I forgot to tell you is that the thrust surface for the outer bearing is a separate piece. The .25" radius is underneath it. The inside of that ring is machined to match the radius.
It is possible that the stress model is off, but I think it's pretty good...
Well, in this case they are the same thing. Yes a picture would help. Unfortunately, I don't have have any handy.
Picture this:
The flange and shaft look like a very short axle shaft from a solid rear axle. The bearing housing is bolted to the suspension upright.
What I did was machine...
Where might I find the endurance limit? Also, 250,000 psi is supposed to be the yeild strength, not ultimate. Although I don't know what the ultimate strength is, it should be higher than the yeild, right?
The radius at the base of the shaft is 0.250" on a 1.5" shaft.
Wheel offset and...
Hi, I'm new here. I just found this site and it looks like a great place to kick some ideas around.
I have a project I've been working on for some time now and I thought I had the solution worked out but ther was a failure recently and I'm having a hard time figuring out why. Hopefully, if I...
