- #1
kelvin490
Gold Member
- 228
- 3
For some metals and alloys the region of the true stress–strain curve from the
onset of plastic deformation to the point at which necking begins may be approximated
by σ=Kεn where n is strain hardening exponent. I wonder whether this equation can be applied to engineering stress-strain curve or just true stress-strain curve? The problem is engineering stress-strain curve would decrease after the point of ultimate stress because of necking, which does not occur in true stress-strain curve.
onset of plastic deformation to the point at which necking begins may be approximated
by σ=Kεn where n is strain hardening exponent. I wonder whether this equation can be applied to engineering stress-strain curve or just true stress-strain curve? The problem is engineering stress-strain curve would decrease after the point of ultimate stress because of necking, which does not occur in true stress-strain curve.