Problem with Callbacks

FLAC3D
1

Hi there,
I’m trying to make a Barton Bandis class in Python, however I can’t compile my code, it always gives me this error:

flac3d>model callback add update_friction_fault python
*** Python error: 'Unused extra parameter 2 (callback) found on command line.\n    While processing line 0 of source Python interpreter.'

The problematic part of the code is here:

    def __init__(
        self,
        interface_name: str,
        JRC: float = 10.0,
        JCS: float = 75000000.0,
        phi_r: float = 15.0,
        cycles_frequency: int = 50,
        friction_max: float = 30.0,
        tension_friction: float = 20.0
    ):
        self.interface_name = interface_name
        self.JRC = JRC
        self.JCS = JCS
        self.phi_r = phi_r
        self.cycles_frequency = cycles_frequency
        self.friction_max = friction_max
        self.tension_friction = tension_friction

        
        it.command(f"model callback add update_friction_{interface_name} python")
       
        it.command(f"model callback modify update_friction_{interface_name} cycle {cycles_frequency}")
        
        it.f2py_function_register(f"update_friction_{interface_name}", self.update_friction)

        it.print_(f"[BartonBandis] Initialized for interface {interface_name}")
        it.print_(f"   JRC={JRC}, JCS={JCS}, phi_r={phi_r}°, freq={cycles_frequency} cycles")

How do I fix this? I’ve tried many things with no success. By the way, I’m using FLAC3D v9.0

Thanks in advance,

Felipe

2

Hello!

I’m not sure if the command "model callback works… i’ve always used fish callback********

1 Like
3

I think I’m very close to make this Class Barton Bandis work.

The problem is precisely here I think:

    def __init__(self, interface_name: str, JRC: float = 10.0, 
                 JCS: float = 75e6, phi_r: float = 15.0,
                 friction_max: float = 30.0, tension_friction: float = 20.0,
                 update_freq: int = 50):
        # Find interface
        self.interface = None
        for contact in it.contact.list():
            if contact.name() == interface_name:
                self.interface = contact
                break

        if not self.interface:
            raise ValueError(f"Interface '{interface_name}' not found")

        self.interface_name = interface_name
        self.JRC = JRC
        self.JCS = JCS
        self.phi_r = phi_r
        self.friction_max = friction_max
        self.tension_friction = tension_friction
        self.update_freq = update_freq

        self._register_callback()
        BartonBandis._instances[interface_name] = self
        
        print(f"\nInitialized BartonBandis for '{interface_name}'")

    def _register_callback(self):
        """FLAC3D callback registration using a module-level function"""
        callback_name = f"bb_update_{self.interface_name}"
        # Create a callback function with the interface name bound using functools.partial
        callback_func = partial(bb_update_callback, interface_name=self.interface_name)
        it.model().callback.add(callback_func, type='mechanical', name=callback_name)
        it.model().callback.modify(callback_name, cycle=1)

When I invoke the class in my model:

model restore 'insitu.f3sav'
python import Barton_Bandis as bb
python bb.BartonBandis.clear_instances()
python bb.setup_barton_bandis_interfaces(fault_names=['fault', 'fault_chamber1', 'fault_chamber2', 'fault_chamber3', 'fault_corridor', 'fault_g1', 'fault_g2', 'fault_g3', 'fault_chamber_small'])

I get these errors in the Python console:

Success: Cleared all BartonBandis instances
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)
Error: function takes exactly 2 arguments (1 given)

Configured 9 Barton-Bandis interfaces

Thanks!