Working of User Defined Constitutive Model

[SamVarun10]

Hi there,
I guess some of you have worked on creating User-Defined Constitutive Models using C++ UDM add-in. I was able to configure and install VS2010 and add the DLL file into the FLAC. But on adding a code line of model example, the properties are not initialised/took by the code. If possible, can the following doubts be conveyed. It would be very helpful for me:

1. Do we need a Release version oF Debug version of the DLL file for the example Constitutive Model created?
2. The basic example already available has Mohr-Coulomb model written inside. If I wanted to work with the same, I started with
   config cppudm
   model load ‘modelexample005_64.dll’
   and then the following code:
   
   
   
   This is the error which I get:
   
   The properties are not being added.
   What should be done?
   Please convey
   Thank you

[jwang]

Since the model ‘example’ was a CPP built model, you have to use z_prop() fish function to extract the properties from the zones. Please see the following post for more details:

Use z_model(),z_prop() and z_group(). to access model and properties

1.To access CPP (CPP built-in and CPPUDM) models and their properties: Use: z_model() to return or modify model name. e.g. if z_model(i,j)=‘finn’ z_prop() to access property name. e.g. _fric=z_prop(i,j,‘friction’) To access other models and their properties: Use: model() to get the constitutive model number. e.g. if model(i,j)= 3 ;Mohr-Coulomb model A list of models on page 2-43 of Fish Reference manual. To access model properties, use the property name directly. e.g. _coh= cohesion(i,…