Difference between revisions of "Imperfect Interface Material"
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where D<sub>n</sub> and D<sub>t</sub> are interfacial stiffness parametes and [u<sub>n</sub>] and [u<sub>t</sub>]. Here n and t refer to normal an tangential directions relative the the interface. | where D<sub>n</sub> and D<sub>t</sub> are interfacial stiffness parametes and [u<sub>n</sub>] and [u<sub>t</sub>]. Here n and t refer to normal an tangential directions relative the the interface. | ||
== Material Properties == | |||
The only to properties for this [[FEA Material Models|FEA material]]) are: | |||
{| class="wikitable" | {| class="wikitable" | ||
Revision as of 10:16, 15 September 2013
Constitutive Law
Interface materials are used only NairnFEA and are only linear elastic. The imperfect interfaces documentation gives the details. The constitutive law relates normal and tangential tractions on the interface to displacement discontinuities:
[math]\displaystyle{ T_n = D_n[u_n] \qquad {\rm and } \qquad T_t = D_t[u_t] }[/math]
where Dn and Dt are interfacial stiffness parametes and [un] and [ut]. Here n and t refer to normal an tangential directions relative the the interface.
Material Properties
The only to properties for this FEA material) are:
| Property | Description | Units | Default |
|---|---|---|---|
| Dn | Normal direction stiffness | MPa/mm | none |
| Dt | Tangential direction stiffness | MPa/mm | none |
History Variables
None