I've been away from ASME certification for "a few years". Things have certainly changed with the 2007 code! After reviewing related threads in this forum, I'm wondering what's the common practice for applying FEA in design by analysis Section III and Section VIII, Division 2.
There are essentially 2 methods:
1) Linear analysis with linearization along SCL
2) Limit load or elastic-plastic analysis methods
I am most familiar with linearization using a SCL. This is the "traditional" method I learned. It's deceptively simple, as it requires proper classification of each stress category (primary, secondary, etc).
Load limit is nice for those comfortable with nonlinear analysis. Create the model, define an elastic-plastic material, apply the required load(s), and let the computer do the work! Easy-breezy! (said a bit tongue in cheek)
So, having been away from the industry, what do most folks do these days? Is SCL now "obsolete"? If not, how does one choose between a linear or nonlinear approach?
I'm interested in a broad set of insights. Thx.
There are essentially 2 methods:
1) Linear analysis with linearization along SCL
2) Limit load or elastic-plastic analysis methods
I am most familiar with linearization using a SCL. This is the "traditional" method I learned. It's deceptively simple, as it requires proper classification of each stress category (primary, secondary, etc).
Load limit is nice for those comfortable with nonlinear analysis. Create the model, define an elastic-plastic material, apply the required load(s), and let the computer do the work! Easy-breezy! (said a bit tongue in cheek)
So, having been away from the industry, what do most folks do these days? Is SCL now "obsolete"? If not, how does one choose between a linear or nonlinear approach?
I'm interested in a broad set of insights. Thx.
