Error in getting results of soiltest in python scripting

Dear Jianshu,

The Soiltest results are stored  inside the .Results per step, and then for each step we can retrieve all these values, meaning that if you would like to get a specific result, you would need to ask for this:

g_t.Triaxial.Results[step].DeviatoricStress.value

where we need to fill in the step number (integer) here. And to get all values, we can just loop look over all steps in the g_t.Triaxial.Results

To make it work for your case, you could adopt the Python script like this, and notice how to retrieve q, ε_1 and P_excess :

from plxscripting.easy import*

port_soiltest = 10000
pasword = r'YOURPASSWORD'
s_t, g_t = new_server('localhost', port, password=pw)

def triaxial(cellpressure, E50, Eoed, Eur):
    """ runs a triaxial test and returns some basic results """
    g_t.Triaxial.CellPressure = cellpressure
    g_t.Material.E50ref = E50
    g_t.Material.EoedRef = Eoed
    g_t.Material.EurRef = Eur
    g_t.calculate(g_t.Triaxial)
    
    q = [i.DeviatoricStress.value for i in g_t.Triaxial.Results]
    eps_1 = [i.Eps1.value for i in g_t.Triaxial.Results]
    p_excess = [i.PExcess.value for i in g_t.Triaxial.Results]
    
    return q, eps_1, p_excess

q, eps_1, p_excess = triaxial(100, 5000, 5000,15000)

After this, you could for instance use those lists with the results to generate a graph:

import matplotlib.pyplot as plt

def plot_q_eps1(q, eps1):
    """ generate a basic graph """
    fig, ax = plt.subplots()
    abs_eps = [i for i in eps1]
    ax.plot(abs_eps, q)
    
    ax.set(xlabel='$\epsilon_1$',
           ylabel='q (kPa)',
           title='Triaxial test result')
    
    """ compression is negative in PLAXIS, so inverse the axis for a nicer look """
    ax.invert_xaxis()
    ax.grid()

    plt.show()
    
plot_q_eps1(q, eps_1)

This would then generate this:

More details on automation was shown in one of our Coffee Corners: Optimizing Undrained Parameters for Undrained Soft Soils

Dear Micha van der Sloot

Your answer perfectly solved my question! Thank you very much! ：)

Sincerely!

Dear Micha Van Der Sloot,

Your answer was useful, thank you. However, I get this error when I write your code:

>C:\ProgramData\Seequent\PLAXIS Python Distribution V2\python\pythonw.exe -u "triaxial_undrained.py"
Traceback (most recent call last):
File "C:\ProgramData\Seequent\PLAXIS Python Distribution V2\python\lib\site-packages\plxscripting\plxproxy.py", line 179, in __getattr__
return self._getattr(attr_name)
File "C:\ProgramData\Seequent\PLAXIS Python Distribution V2\python\lib\site-packages\plxscripting\plxproxy.py", line 116, in _getattr
raise AttributeError("Requested attribute '{}' is not present".format(attr_name))
AttributeError: Requested attribute 'Triaxial' is not present

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "triaxial_undrained.py", line 22, in <module>
q, eps_1, p_excess = triaxial(100, 5000, 5000,15000)
File "triaxial_undrained.py", line 10, in triaxial
g_t.Triaxial.CellPressure = cellpressure
File "C:\ProgramData\Seequent\PLAXIS Python Distribution V2\python\lib\site-packages\plxscripting\plxproxy.py", line 182, in __getattr__
return self._getattr(attr_name)
File "C:\ProgramData\Seequent\PLAXIS Python Distribution V2\python\lib\site-packages\plxscripting\plxproxy.py", line 116, in _getattr
raise AttributeError("Requested attribute '{}' is not present".format(attr_name))
AttributeError: Requested attribute 'Triaxial' is not present
>Exit code: 1

I would appreciate if anyone can help

thanks