can I konw other reference for Pinch model?

[chris]

Hi...
According to the User Manual, the Pinch model uses the damage model for the strength and stiffness degradation.
Whom this is originated from ? or other reference...?
Thank you.

[silvia]

Pinching4 material was written by:

Laura N. Lowes and Nilanjan Mitra

at University of Washington.

[chris]

Is this early in the morning? before 7:00...
Thank you very much...
One more question...
Below the board, someone asked about fractors for simulation of hardening, stiffness degradation. So you answered to ask to Professor...
Until don't you have other Ideas? ^^
Nowadays, I'm trying to simulate the moment-curvature relation for the nonlinear from the experimental data... so I'm trying to find most similar shape using the parameter study... Is this the best way?
Help me...
Thanks again...

[silvia]

sorry, but i don't really understand the message.