[MBDyn-users] Constitutive law for a chain

Rudi Jaeger rudijaeger at yahoo.com
Fri May 9 15:01:51 CEST 2008


Dear Dr. Masarati,

thank you for all your help.

You could rather try something like

set: real eps_min = -1;
set: real f_min = 0.;
set: real eps_max = 1.;
set: real f_max = 1.e9;

scalar function:
 "k_step_fun", multilinear,
  -eps_min, f_min,
  0., f_min,
  eps_max, f_max;
Shouldn't it read: eps_min, f_min, above?
I haven't figured out a way to have scalar functions with prestrain.
It results in a request for a semicolon in line n+1, if a definition
is used like the one below (I'm still using mbdyn-1.3.1-Alpha - maybe
that's the reason). 

constitutive law: 
     cl_rod, 
     1, 
     scalar function elastic,
     "k_step_fun",                            <-Line n
     prestrain,
     single,
     parabolic,
     0.,
     0.,
     -0.2;

Cheers,
Rudi

       
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