Variable to refer to current time in user defined function

- October 26, 2021 at 5:35 pm
  
  marcansyl
  Subscriber
  
  Hi all,
  
  I am currently defining a user-defined function using Beam in Solid. I want to refer to the current time in my function ? What is the global variable used by LS Dyna for the time. My analysis is run for a time range between 0 and 400, and my timestep is 1. This means I will have 401 different times for the function to be called. And What I want to know is how to call the current time each time the function is called. is it "t" ? "time" ? or ...?
  
  Thanks,
  Marc
- October 26, 2021 at 9:02 pm
  
  Andreas Koutras
  Ansys Employee
  
  Hi Marc, add the following line to confirm that the current time is printed in the terminal screen. Let me know if this works.
  print(time);
- October 27, 2021 at 4:50 pm
  
  marcansyl
  Subscriber
  
  Thanks,
  I still cannot use the time as condition in if in my code.
  what I want is to have for instance : if (time>200) {shear=0;}
  when I do that, it gives me shear = 0 for all time between 0 and 400.
  
  Marc
- October 27, 2021 at 7:08 pm
  
  Andreas Koutras
  Ansys Employee
  
  Hi Marc, check your function with a simple model. What happens to "shear" when time<200? The "time" variable works . Take a look at the sample function below. It will be much more challenging to implement a model in the umat package.
  *DEFINE_FUNCTION
  $#fidheading
  99
  $#function
  float force(float slip,float leng, float *stiff)
  {
  float force;
  if (time>5.e-4) {force=0.1;}
  print(time);
  print(force);
  *stiff=100000.0;
  return force;
  }