Hi, I'm using WQS 11.0 M010 to estimate reliability of a mecahnical design. With mechanical license I'm able to enter part parameters and get failure rate for each.
But under torsion spring part, I noticed an abnormal pi factor (CL in this case) for spring displacement. It is 13500. I checked the displacement theoretically and it's OK. Actually its one third of static limit.
Then I calculated the associated CL by using NSWC - Handbook of Reliability Prediction Procedures for Mechanical Equipment Figre 4.13. It came out as 0.072!
I'm using degrees for displacement as stated in the reference guide of the software.
Then I checked all of the pi factors of mechanical parts using the same document. I found the same inconsistency for 4 other factors. These are; Cdc & CL for torsion spring, Ct for solenoid, Ccw & Cr for ball bearing.
How can it be possible? I can only imagine unit mistake, but I checked it wrt to reference guide.
Also if anyone can check these pi factors whether they are calculated normally or not?
You can find the related screenshot for torsion spring.