Mooney Membrane Material

From OSUPDOCS
Jump to navigation Jump to search

Constitutive Laws

This MPM material is in development is only available in OSParticulas.

Material Properties

Property Description Units Default
(properties) Enter all properties for the corresponding solid Mooney material none none
dither Add random spread of initial orientation angles to better model compression of thin membranes degrees 0

Note that unlike a solid Mooney material, a Mooney membrane can be incompressible by setting the Poisson's ratio of 0.5.

History Variables

This material uses one history variable:

  1. J or the determinant of the deformation and equal to V/V0.

Examples

Membrane materials can only be defined using XML commands. In scripted files, the XML commands can be within an XMLData block where first parameter add XML to the Material element and second parameter is material name that can be used in other scripting commands

XMLData "Material","membrane"
  <Material Type="40" Name="Membrane">
    <E>&Mmod;</E>
    <nu>&Mnu;</nu>
    <dither>0</dither>
    <rho>&Mrho;</rho>
   < alpha>60</alpha>
  </Material>
EndXMLData

Notice the use of entities is a good way to coupled scripting commands to XML data blocks.