URGENT - SOME FATIGUE CYCLING TERMS
URGENT - SOME FATIGUE CYCLING TERMS
(OP)
Can anyone give any info/definitions of the following?
-coffin-manson fatigue coefficient
-hardening exponent
-coefficient of plastic resistance
Thanks
-coffin-manson fatigue coefficient
-hardening exponent
-coefficient of plastic resistance
Thanks





RE: URGENT - SOME FATIGUE CYCLING TERMS
Fundamentals of Metal Fatigue Analysis
---bannantine
RE: URGENT - SOME FATIGUE CYCLING TERMS
RE: URGENT - SOME FATIGUE CYCLING TERMS
Coffin manson characterizes the plastic area (equivalent of low cycle fatigue)
Other parameters are related to Ramberg-Osgood cycle hardening/softening material curve
PhV
RE: URGENT - SOME FATIGUE CYCLING TERMS
As I found Bannantine quite hard to get hold of, here's my take on these parameters:
A strain-life curve is basically made up of two log-log straight curves for the elastic and plastic strains;
elastic coefficient = fatigue strength coefficient
elastic exponent = " " (Basquin) exponent
plastic coefficient = " ductility coefficient
plastic exponent = " " (Coffin-Manson) exponent
Basquin between -0.05 and -0.12 for some typical steels, Coffin-Manson from -0.5 to -0.7?
Safe Technology of Sheffield, UK have provided some good advice, courses etc in the past...
Good luck!
RE: URGENT - SOME FATIGUE CYCLING TERMS
Doug
Doug