How to extract contact reaction forces using DPF from inside mechanical

Vishnu

Vishnu

below is a function which does this extraction.

You need to pass the object name as the argument to this function.

def get_cont_reaction(contact_obj_name):
    """    
    Use like below:    get_cont_reaction("Contact Region")    
    """    
    first_solution = ExtAPI.DataModel.Project.Model.Analyses[0].Solution    
    solver_data = first_solution.SolverData    
    contact_object = ExtAPI.DataModel.GetObjectsByName(contact_obj_name)[0]
    contact_object_data = solver_data.GetObjectData(contact_object)
    cont_elem_type_id = contact_object_data.SourceId    
    cont_elems = solver_data.ElementIdsByMaterialId(str(cont_elem_type_id))
    import mech_dpf    
    import Ans.DataProcessing as dpf    
    #Result Data    
    analysis1 = ExtAPI.DataModel.Project.Model.Analyses[0]
    dataSource = dpf.DataSources(analysis1.Solution.ResultFilePath)
    #model    
    my_model = dpf.Model(analysis1.Solution.ResultFilePath)
    #my mesh    
    my_mesh = my_model.Mesh    
    #time scoping    
    my_time_scoping = [1]
    #scoping    
    my_scoping = dpf.Scoping()
    my_scoping.Location = "Elemental"    
    my_scoping.Ids = cont_elems    
    CX = dpf.operators.result.mapdl.nmisc(time_scoping=my_time_scoping,mesh=my_mesh,data_sources=dataSource,item_index = 43,mesh_scoping=my_scoping).outputs.fields_container.GetData()[0]
    CY = dpf.operators.result.mapdl.nmisc(time_scoping=my_time_scoping,mesh=my_mesh,data_sources=dataSource,item_index = 44,mesh_scoping=my_scoping).outputs.fields_container.GetData()[0]
    CZ = dpf.operators.result.mapdl.nmisc(time_scoping=my_time_scoping,mesh=my_mesh,data_sources=dataSource,item_index = 45,mesh_scoping=my_scoping).outputs.fields_container.GetData()[0]
    #Release Locked RST    
    my_model.ReleaseStreams()
    return [-sum(CX.Data),-sum(CY.Data),-sum(CZ.Data)]

Vishnu

The nmisc result operator is updated in recent releases like below:

dpf.operators.result.nmisc