How can I draw stress strain curve of Hysteretic material?

[chris]

Hi... happy new year...
I just try to use uniaxialMaterial Hysteretic...
For the stress strain curve, I used "procRCycDAns.tcl" script which is included in manual.
If backbone curve has only hardening, there is no problem.
But, if it has softening, namely, e3p<e2p, it makes an error.

This is the same when I use Pinching4 material.
If the value of 'peakpts' is larger than ePd3 of Pinching4, it maks an error.

Please give me some help.

I found one post for similar question. but I cannot find answer...
Thanks...

[silvia]

is e3p a strain?

[chris]

Thanks...

I meant strength degradation... I just used hysteric material like below...

2 tcl files are in the manual.

In " RCyclicPinch.tcl" for drawing stress-strain curve,
----------------------------------------
source procRCycDAns.tcl
....
uniaxialMaterial Hysteretic 1 4326.0 0.006995 4548.0 0.05535 800.0 0.09 -4326.0 -0.006995 -4548.0 -0.05535 -800 -0.09 0.0 0.0 0.00 0.0 0.3
.....
set peakpts [list 0.003 0.010 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.06]
-----------------------------------------

If I extract the 0.06 in set peakpts[ ], it makes no error.

I just want to know how I can draw a figure 37 Hyster_1 material in last version manual. ... which has softening and no damage.

Please, give me some information...

Thanks...

[silvia]

i'd use the plain hysteretic material.