strain hardening coefficient?
strain hardening coefficient?
(OP)
A year or so ago, I remember I saw one practical way to interpret or get strain hardening coefficient. It is like dividing tensile strength by yield strength, then minus 1, you will get the cofficient. I am give you example here to tell you what I am asking. It is something like this, but I can't remember.
Does this ring any bell to anyone? Thanks a lot. How Christmas eve dinner treat everyone? I have been super sick, didn't have anything.
Does this ring any bell to anyone? Thanks a lot. How Christmas eve dinner treat everyone? I have been super sick, didn't have anything.





RE: strain hardening coefficient?
Please follow the link and you might get some useful values for "n". Hope,it helps.
RE: strain hardening coefficient?
RE: strain hardening coefficient?
F=σA
dF=dσA+σdA
At maximum load (ultimate strength σu) dF=0 so
dσA=-σdA or dσ/σ=-dA/A
For constant volume process
V=AL; dV=AdL+LdA=0
-dA/A=dL/L=dε
So dσ/σ=dε at ultimate load or
dσ/dε=σ
If σ=Kεn
dσ/dε=Knεn-1
Kεn=Knεn-1 -> n=ε
So the strain hardening exponent is equal to the true strain at ultimate load.
RE: strain hardening coefficient?