Yook
Materials
- Jun 23, 2017
- 9
How does one go about developing or locating material properties to use in an inelastic analysis? It seems like a problem most analysts will come across and I have not found much definitive discussion.
For instances where plastic analysis is required such as failure analysis or design of crash test barriers, what is the industry standard for coming up with something along the lines of a ”representative” true stress/strain curve to input into an FEA program?
I imagine the reason I can’t find such information easily is because there is so much variability between lots in the inelastic region of a stress strain curve for a given material that it is difficult to come up with a conservative curve which fits the material in a broad sense. I have seen “typical” stress strain curves in MMPDS, though I am not sure if these are intended to be used in this manner( aka have a statistical conservatism included) or are for reference only.
Structural steels such as A36 are my concern right now. Please direct me towards any approaches to this which others are using or if this problem is really just very complex and not so easily condensed.
Thank you
For instances where plastic analysis is required such as failure analysis or design of crash test barriers, what is the industry standard for coming up with something along the lines of a ”representative” true stress/strain curve to input into an FEA program?
I imagine the reason I can’t find such information easily is because there is so much variability between lots in the inelastic region of a stress strain curve for a given material that it is difficult to come up with a conservative curve which fits the material in a broad sense. I have seen “typical” stress strain curves in MMPDS, though I am not sure if these are intended to be used in this manner( aka have a statistical conservatism included) or are for reference only.
Structural steels such as A36 are my concern right now. Please direct me towards any approaches to this which others are using or if this problem is really just very complex and not so easily condensed.
Thank you
