Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Weibull wrote:
Doing so, the beta slope ranges from approximately 2.4-3.0
So what does this mean? Well from pages 2-10 and 2-11 from the New Weibull Handbook by Dr. Robert B. Abernethy we read.
"1.0<4.0 Implies Early Wear Out
If these failures occur within the design life they are unpleasant surprises. There are many mechanical failure modes in this class and beta is predictable for generic failure modes.
Low cycle fatigue-beta varies from 2.5-4.0
Ball bearing failures-beta = 2.0, roller bearings-beta = 1.5
Corrosion, erosion-beta = 2.0-3.5
however stress corrosion will be 5.0 or greater"
There is a whole known beta value ranges database here http://www.barringer1.com/wdbase.htm Great site and lots of resources for anything reliability engineering related.
You can form your own opinion, this is just a preliminary observation.
How does this apply when you are dealing with a DLC coating?
I would say the data does not necessarily apply.
