Hi all,
Can anyone direct me to a source with a S-N curve for 12L14. I understand the additions of lead and sulfur to increase machineability tend to reduce fatigue properties. I can't seem to find any data that shows this.
Thanks in advance!
Sounds like maybe excessive deflection? Have you done any hand calcs to see if you are in the right ballpark with regard to loading and geometry of your part? I would double check your constraints and then see if I could get it to run with a much smaller load.
Gurmeet, that is a logical way to look at it, and it makes sense. Thanks for your input.
Voyage, if I understand your question, I think that the answer lies in that fatigue occurs due to tiny areas that are in fact above yield stress. Even if the whole part in theory is below Sy, there are...
Ok, replying to myself now. I realized that I used a generic formula for austenitic SS to calculate the notch resistance. From some further reading, it might not apply to 303 due to its sulfide content to improve machinability. Now its looking like the design is on the hairy edge. So, to be...
Thanks for the responses so far.
RB - I am fairly confident that the FEA has converged, and that the peak 55 ksi is real. The material is 303 stainless and it can be hardened to 60 rockwell .06" deep. I am currently looking into whether this will help or hurt the fatigue properties. (any help...
All, I am trying to determine the fatigue life of a shaft (with splines machined into it) in combined rotating and bending. Assuming high cycle fatigue.
According to FEA, the max von mises stress is 55 ksi at the fillet between the splines. This agrees fairly well with hand calculations...
thanks for the replys so far.
dsi, I cant use 2d pipe elements as some of the tubing is not all round (aero shaped), also I would like to analyze the effect of gusseting and fillet size.
It sounds like I need some more powerful software (and probably more computer power to run it).
Hi,
Im trying to run a static fea analysis on a bicycle frame using shells as the tubing which is quite thinwall (0.4mm-0.9mm). Cosmos apparently cant mesh multiple shells (ie the tubes in the frame) in an assembly,it can only shell mesh individual parts. It can only mesh solids elements in...
