Mooney Membrane Material

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 Command 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 defining terms in Entity commands is a good way to couple scripting commands to XML data blocks.