Community Tip - Visit the PTCooler (the community lounge) to get to know your fellow community members and check out some of Dale's Friday Humor posts! X

Parameter for mass density.

SS4598
14-Alexandrite

Parameter for mass density.

  • I want to use parameters for assigning material to parts in assembly. What is key difference between PTC_MASS_DENSITY and MP_DENSITY?. Which one would be correct to assign density using parameters.

 

Additionally what is correct syntax to assign material to part using parameter. As when I use PTC_MASS_MATERIAL = Aluminum it displays error. 

ACCEPTED SOLUTION

Accepted Solutions
Chris3
21-Topaz I
(To:SS4598)

MP_DENSITY is user editable pre-multibody parameter that still works but only for single body parts. For instance if you are modeling a part that has a known weight regardless of size you could write a relation like:

 

MP_DENSITY = 5 / PRO_MP_VOLUME

 

The mass of the part would always be 5.

 

PRO_MP_DENSITY is a reported density that is the average of all of the densities of the bodies and their associated materials. IE body1 density + body2 density / # Bodies

PTC_MASS_DENSITY is the parameter in the material file (.mtl) that defines the density for that material.

 

PRO_MP_ALT_DENSITY is linked to MP_DENSITY unless you change it and then the link is broken. PRO_MP_ALT_DENSITY is changed by defining mass properties manually (File -> Prepare -> Mass Properties -> Change -> Define Properties by "Fully Assigned" -> Type in a density number)

 

Had enough density?

View solution in original post

2 REPLIES 2
Chris3
21-Topaz I
(To:SS4598)

MP_DENSITY is user editable pre-multibody parameter that still works but only for single body parts. For instance if you are modeling a part that has a known weight regardless of size you could write a relation like:

 

MP_DENSITY = 5 / PRO_MP_VOLUME

 

The mass of the part would always be 5.

 

PRO_MP_DENSITY is a reported density that is the average of all of the densities of the bodies and their associated materials. IE body1 density + body2 density / # Bodies

PTC_MASS_DENSITY is the parameter in the material file (.mtl) that defines the density for that material.

 

PRO_MP_ALT_DENSITY is linked to MP_DENSITY unless you change it and then the link is broken. PRO_MP_ALT_DENSITY is changed by defining mass properties manually (File -> Prepare -> Mass Properties -> Change -> Define Properties by "Fully Assigned" -> Type in a density number)

 

Had enough density?

SS4598
14-Alexandrite
(To:Chris3)

Thank you!!

Announcements
NEW Creo+ Topics: Real-time Collaboration


Top Tags