topic Re: Duplicated items in material properties in Fusion API and Scripts Forum

Duplicated items in material properties

j.han97 — Thu, 18 Nov 2021 01:40:36 GMT

Hi all,

I was trying to check the material properties of a body:

body = root_comp.bRepBodies[0] #Take Body1 under rootComponent mat_prop = body.material.materialProperties #Default material - Steel

Their names were collected to a list and printed:

mat_prop_name = [mp.name for mp in mat_prop] print(mat_prop_name)

It returned:

['Comments', 'Cost', 'Keynote', 'Keywords', 'Label', 'Manufacturer', 'Mark', 'Model', 'Type', 'URL', 'Class', 'physmat_classification', 'Sharing', 'Behavior', 'Damping Coefficient', 'Density', 'External Material ID', 'Tensile Strength', 'Yield Strength', "Poisson's Ratio", "Poisson's Ratio 12", "Poisson's Ratio 23", "Poisson's Ratio X", "Poisson's Ratio Y", "Poisson's Ratio Z", 'Shear Modulus', 'Shear Modulus 12', 'Shear Modulus X', 'Shear Modulus Y', 'Shear Modulus Z', 'Specific Heat', 'Thermal Conductivity', 'Thermal Conductivity X', 'Thermal Conductivity Y', 'Thermal Conductivity Z', 'Thermal Expansion Coefficient', 'Thermal Expansion Coefficient 1', 'Thermal Expansion Coefficient 2', 'Thermal Expansion Coefficient X', 'Thermal Expansion Coefficient Y', 'Thermal Expansion Coefficient Z', 'Thermally Treated', "Young's Modulus", "Young's Modulus 1", "Young's Modulus 2", "Young's Modulus X", "Young's Modulus Y", "Young's Modulus Z", 'Source', 'Source URL', 'Subclass', 'Sharing', 'Behavior', 'Density', 'Electrical Resistivity', 'Emissivity', 'Permeability', 'Porosity', 'Reflectivity', 'Specific Heat', 'Thermal Conductivity', 'Thermal Conductivity X', 'Thermal Conductivity Y', 'Thermal Conductivity Z', 'Transmits Light', 'Source', 'Source URL', 'Subclass']

I noticed that there were some duplicated names in this list, e.g. Density, Specific Heat, Behavior etc.

To be exact, there were 11 duplicated items in this list.

len(mat_prop_name)-len(set(mat_prop_name))

This returned 11.

May I know the reason behind this?

Thank you so much.

Re: Duplicated items in material properties

kandennti — Thu, 18 Nov 2021 03:19:31 GMT

Hi @j.han97 .

When I tried it, there was no duplication of names. (Win10)

# Fusion360API Python script import traceback import adsk.fusion import adsk.core def run(context): ui: adsk.core.UserInterface = None try: app: adsk.core.Application = adsk.core.Application.get() ui = app.userInterface des: adsk.fusion.Design = app.activeProduct root: adsk.fusion.Component = des.rootComponent body = root.bRepBodies[0] mat_prop = body.material.materialProperties mat_prop_name = [mp.name for mp in mat_prop] print(f'Version: Ver{app.version}') print( f'len(mat_prop_name)-len(set(mat_prop_name)) -> {len(mat_prop_name)-len(set(mat_prop_name))}\n') for mp in mat_prop: print(f'{mp.name} : {mp.id}') except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

Version: Ver2.0.11415 len(mat_prop_name)-len(set(mat_prop_name)) -> 0 Comments : physmat_Comments Cost : physmat_Cost Keynote : physmat_Keynote Keywords : physmat_Keywords Label : physmat_Label Manufacturer : physmat_Manufacturer Mark : physmat_Mark Model : physmat_Model Type : physmat_Type URL : physmat_URL Class : physmat_class physmat_classification : physmat_classification Sharing : common_Shared_Asset Behavior : structural_Behavior Damping Coefficient : structural_Damping_coefficient Density : structural_Density External Material ID : structural_ExternalMaterialID Tensile Strength : structural_Minimum_tensile_strength Yield Strength : structural_Minimum_yield_stress Poisson's Ratio : structural_Poisson_ratio Poisson's Ratio 12 : structural_Poisson_ratio_12 Poisson's Ratio 23 : structural_Poisson_ratio_23 Poisson's Ratio X : structural_Poisson_ratio_X Poisson's Ratio Y : structural_Poisson_ratio_Y Poisson's Ratio Z : structural_Poisson_ratio_Z Shear Modulus : structural_Shear_modulus Shear Modulus 12 : structural_Shear_modulus_12 Shear Modulus X : structural_Shear_modulus_X Shear Modulus Y : structural_Shear_modulus_Y Shear Modulus Z : structural_Shear_modulus_Z Specific Heat : structural_Specific_heat Thermal Conductivity : structural_Thermal_conductivity Thermal Conductivity X : structural_Thermal_conductivity_X Thermal Conductivity Y : structural_Thermal_conductivity_Y Thermal Conductivity Z : structural_Thermal_conductivity_Z Thermal Expansion Coefficient : structural_Thermal_expansion_coefficient Thermal Expansion Coefficient 1 : structural_Thermal_expansion_coefficient_1 Thermal Expansion Coefficient 2 : structural_Thermal_expansion_coefficient_2 Thermal Expansion Coefficient X : structural_Thermal_expansion_coefficient_X Thermal Expansion Coefficient Y : structural_Thermal_expansion_coefficient_Y Thermal Expansion Coefficient Z : structural_Thermal_expansion_coefficient_Z Young's Modulus : structural_Young_modulus Young's Modulus 1 : structural_Young_modulus_1 Young's Modulus 2 : structural_Young_modulus_2 Young's Modulus X : structural_Young_modulus_X Young's Modulus Y : structural_Young_modulus_Y Young's Modulus Z : structural_Young_modulus_Z Source : structural_source Source URL : structural_sourceURL Subclass : structural_subclass

Re: Duplicated items in material properties

j.han97 — Thu, 18 Nov 2021 04:08:33 GMT

Hi @kandennti ,

I have imported some external models in the same session. Do you think this affects the material libraries?

I will do a simple check by starting a 'clean' session of Fusion 360 later when I'm free and verify if the problem still exists for me.

Re: Duplicated items in material properties

kandennti — Thu, 18 Nov 2021 04:12:26 GMT

@j.han97 .

I found out that there are differences between materials.
I don't know why they overlap.

# Fusion360API Python script import traceback import adsk.fusion import adsk.core def run(context): ui: adsk.core.UserInterface = None try: app: adsk.core.Application = adsk.core.Application.get() ui = app.userInterface for materialLibrary in app.materialLibraries: for material in materialLibrary.materials: materialName = material.name mat_prop_name = [mp.name for mp in material.materialProperties] overlap = len(mat_prop_name)-len(set(mat_prop_name)) print(f'{materialName} : {overlap}') except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

Re: Duplicated items in material properties

j.han97 — Thu, 18 Nov 2021 07:17:55 GMT

Hi @kandennti ,

I used your script and made a little modification to see the differences between the duplicate items.

import adsk.core, adsk.fusion, traceback import itertools def run(context): ui = None try: app = adsk.core.Application.get() ui = app.userInterface for materialLibrary in app.materialLibraries: for material in materialLibrary.materials: materialName = material.name mat_prop_name = [mp.name for mp in material.materialProperties] unique = [] duplicate = [] for mp in material.materialProperties: if mp.name not in unique: unique.append(mp.name) elif mp.name not in duplicate: duplicate.append(mp.name) for dup in duplicate: value = [] for mp in material.materialProperties: if mp.name == dup: value.append(mp.value) for (val_1, val_2) in itertools.combinations(value, 2): if val_1 != val_2: print(f'{materialName} - {dup}: {val_1}, {val_2}') except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

For many materials, the only difference is the 'Behavior' property:

Behavior: structural_isotropic, thermal_isotropic

And for some materials, the duplicate 'Density', 'Thermal Conductivity' properties are also different. E.g.:

PVC, Unplasticized - Density: 1290.0, 1400.0 PVC, Unplasticized - Thermal Conductivity: 0.19, 0.251

I guess they prepared different values to be used in thermal & structural simulations, but I am totally unsure since I have little knowledge in this aspect.