2.5.7.2.6. Physical properties from PARTsolutions

2.5.7.2. Additional information 2.5.7.2.6. Physical properties from PARTsolutions
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If on the part of PARTsolutions the physical properties are set in the CNS classification, then these are also transferred to the CAD system during export.

In PARTdataManager the attributes of the CNS classification are displayed under index tree, context menu of a part, menu item Part information.

Part information

In NX, the material properties are available on part level under Properties -> tabbed page Attributes.

Exemplary figure of NX 1899

The available methods for the display of mass properties depend on respective NX version.

Example using NX 1899: Analysis > Measure > Selection Filter "Solid Body" > Measure dialog (Object) > click on body

Example using NX 1899: Analysis->Show Mass Properties-> dialog area "Mass Properties" -> Update

In the following is explained how NX acts in different scenarios:

Volume
Since the volume property in NX is not changeable, the volume transferred from PARTsolutions (CNSVOLUMEEXACT) is ignored. Instead the real volume of the model is used for all calculations.
Where does the value for the density come from? (Priority sorted top down)
1. Calculated from volume (CNSVOLUMEEXACT) and mass (CNSMASSEXACT)
2. Fetched from the material (thus indirectly from CNSMAT)
3. Directly imported from CNSDENSITY
4. CAD default value (Steel)
Where does the value for the mass come from? (Priority sorted top down)
1. If the mass (CNSMASSEXACT) is transferred from PARTsolutions, then it is overtaken with highest priority.
  The density of the model is calculated from the mass. CNSDENSITY and the density information from CNSMAT are ignored.
2. If the material (CNSMAT) is transferred from PARTsolutions, it is overtaken, provided that there is an entry in the file pyhs_material.dat of the NX installation.
3. If neither CNSMASSEXACT nor CNSMAT is transferred from PARTsolutions, the density from CNSDENSITY is used. The mass is calculated from this value.
4. If no parameters are transferred from PARTsolutions, the density gets a default value of 7830.64 kg/m³ by NX.

Setting options for physical properties

There are different setting options available for the handling of physical properties of solids during export.in the configuration file ifugnx.cfg:

[Categories]
PhysicalPropertiesMode=0/1/2/3

0: Physical properties are not mapped at all. They are either acquired from the material (if provided) or calculated from NX customer defaults.

1: "Assert" mode for the physical properties

Available properties:

CNSMASSEXACT (Mass)
CNSDENSITY (Density)
CNSVOLUMEEXACT (Volume)
CNSCOG (Center of gravity)

Physical properties are "asserted" (mapped to specially provided NX fields). This option will make them appear in various information windows, such as the "Displayed Part Weight" properties dialog. It is also possible to map these properties to assemblies in this manner. Mass, density, volume and center of gravity can be mapped.

Note

Note that the assignment of mass, density and volume only works if either a) the mass (CNSMASSEXACT) is specified or b) both the density (CNSDENSITY) AND volume´(CNSVOLUMEEXACT) are specified. If just the density or volume are specified, the assignment will fail.

If an assignment fails, then a respective error message is displayed. See below.

2: "Real" physical properties are set
Available properties:
- CNSMASSEXACT
- CNSDENSITY
Physical properties are set at the model level (mapped directly to the actual NX physprops). This method only works with parts. Only density and mass can be assigned this way.
3: Options 1 and 2 are both enabled.

Default value: 1

Possible error message

If "PhysicalPropertiesMode" is set to 1 or 3, then at missing key parameters the following error message is displayed:

Failed to assert physical properties due to missing key parameters.
 
Either the mass or both volume and density must be provided
 for a successful assertion.

If only the density is available,
 please select a different physical properties assignment mode 
 (set PhysicalPropertiesMode to '2' in the configuration file ifugnx.cfg).

	Note
	The warning for PhysicalPropertiesMode=3 (density set, but not asserted) has the "Moderate" importance level and is displayed only when the key DisplayCreationWarningLevel is at 50 or higher. The warning for PhysicalPropertiesMode=1 (density not set at all) has the "Major" importance level and is visible by default.

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2.5.7.2.5. Add PARTsolutions commands to NX context menu	Home	2.5.7.2.7. NX: Testing PARTsolutions parts in the Mechatronics Concept Designer