Linear Imperfect Interface - Revision history

Nairnj: /* Properties */

2026-03-28T00:25:49Z

Properties

← Older revision		Revision as of 00:25, 28 March 2026
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	\|}		\|}

	This implementation automatically converts any interface that is too ''stiff'' to be ~~modeling~~ using current resolution to a perfect interface. Alternatively, if you always want a perfect interface set its stiffness parameter to -1.		This implementation automatically converts any interface that is too ''stiff'' to be modeled using current resolution to a perfect interface. Alternatively, if you always want a perfect interface set its stiffness parameter to -1.

	== Examples ==		== Examples ==

Nairnj: /* Properties */

2026-03-25T21:06:57Z

Properties

← Older revision		Revision as of 21:06, 25 March 2026
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	~~In theory, very large~~ interface ~~parameters will result in~~ a perfect interface~~, but they also make the numerical equations very "stiff" and therefore potentially unstable~~. ~~To solve this issue~~, you ~~can set any interface parameter to -1 to indicate an infinite interface parameter or~~ a perfect interface~~. When a~~ parameter is -1~~, the equations are handled differently to avoid stability issues~~.		This implementation automatically converts any interface that is too ''stiff'' to be modeling using current resolution to a perfect interface. Alternatively, if you always want a perfect interface set its stiffness parameter to -1.

	== Examples ==		== Examples ==

Nairnj: /* Properties */

2017-02-09T16:38:12Z

Properties

← Older revision		Revision as of 16:38, 9 February 2017
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	In theory, very large interface parameters will result in a perfect interface, but they also make the numerical equations very "stiff" and therefore potentially unstable. To solve this issue, you can set any interface parameter to -1 to indicate an infinite interface parameter or a perfect interface. When a parameter is -1, the equations are handled differently to avoid stability issues.		In theory, very large interface parameters will result in a perfect interface, but they also make the numerical equations very "stiff" and therefore potentially unstable. To solve this issue, you can set any interface parameter to -1 to indicate an infinite interface parameter or a perfect interface. When a parameter is -1, the equations are handled differently to avoid stability issues.

			== Examples ==

			Material "interfaceID","My Imperfect Interface","LinearInterface"
			Dn 500
			Dt 0
			Done

Yaimene: /* Properties */

2017-01-19T23:30:41Z

Properties

← Older revision		Revision as of 23:30, 19 January 2017
Line 32:		Line 32:
	\|}		\|}

	In theory, very large interface parameters will result in a perfect interface, but they also make the numerical equations very "stiff" and therefore potentially unstable. To solve this issue, you can set any interface parameter to -1 to indicate an infinite interface parameter or a perfect interface. When a parameter is -1, the equations are handled ~~different~~ to avoid stability issues.		In theory, very large interface parameters will result in a perfect interface, but they also make the numerical equations very "stiff" and therefore potentially unstable. To solve this issue, you can set any interface parameter to -1 to indicate an infinite interface parameter or a perfect interface. When a parameter is -1, the equations are handled differently to avoid stability issues.

Nairnj: /* Properties */

2016-01-24T16:20:19Z

Properties

← Older revision		Revision as of 16:20, 24 January 2016
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	! Property !! Description !! Units !! Default		! Property !! Description !! Units !! Default
	\|-		\|-
	\| Dnt \|\| ~~The dynamic coefficient of friction~~ \|\| ~~none~~ \|\| 0		\| Dnt (or Dn) \|\| Imperfect interface parameter for normal direction when in tension \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure/length units]] \|\| -1
	\|-		\|-
			\| Dnc \|\| Imperfect interface parameter for normal direction when in compression. If Dnc is not specified, it set equal to Dnt. \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure/length units]] \|\| none
			\|-
			\| Dt \|\| Imperfect interface parameter for tangential direction \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure/length units]] \|\| -1
	\|}		\|}

			In theory, very large interface parameters will result in a perfect interface, but they also make the numerical equations very "stiff" and therefore potentially unstable. To solve this issue, you can set any interface parameter to -1 to indicate an infinite interface parameter or a perfect interface. When a parameter is -1, the equations are handled different to avoid stability issues.

Nairnj: /* Properties */

2016-01-24T16:11:11Z

Properties

← Older revision		Revision as of 16:11, 24 January 2016
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	== Properties ==		== Properties ==

			The properties for this law are:

			{\| class="wikitable"
			\|-
			! Property !! Description !! Units !! Default
			\|-
			\| Dnt \|\| The dynamic coefficient of friction \|\| none \|\| 0
			\|-
			\|}

Nairnj: /* Description */

2016-01-24T16:07:11Z

Description

← Older revision		Revision as of 16:07, 24 January 2016
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	== Description ==		== Description ==

	This [[Contact Laws#Imperfect Interface Contact Laws\|imperfect interface contact law]] ~~assume~~ the normal and tangential tractions are linear and depend only on the normal and tangentatial displacement discontinuities:		This [[Contact Laws#Imperfect Interface Contact Laws\|imperfect interface contact law]] assumes the normal and tangential tractions are linear and depend only on the normal and tangentatial displacement discontinuities, respectively:


			<math>T_n = D_n[u_n]</math>


			<math>T_t = D_t[u_t]</math>

			where D<sub>n</sub> and D<sub>t</sub> are two interface parameters, which are infinite for a perfect interface (zero displacement discontinuity) and 0 for a debonded interface (zero traction). But this linear law would allow the two materials to interpenetrate, especially if D<sub>n</sub> was low. To correct this issue, the traction law in the normal direction is allowed to be bilinear:


			<math>T_n = \left\{ \begin{array}{ll} D_{nt}[u_n] & {\rm \ if\ }[u_n]>0 \\ D_{nc}[u_n] & {\rm \ otherwise} \end{array} \right.</math>

			where D<sub>nt</sub> and D<sub>nc</sub> are separate interface parameters for the interface being in tension or compression.

	== Properties ==		== Properties ==

Nairnj: Created page with "TOC == Description == This imperfect interface contact law assume the normal and tangential tractions are linear and dep..."

2016-01-24T15:50:49Z

Created page with "__TOC__ == Description == This imperfect interface contact law assume the normal and tangential tractions are linear and dep..."

New page

__TOC__
== Description ==

This [[Contact Laws#Imperfect Interface Contact Laws|imperfect interface contact law]] assume the normal and tangential tractions are linear and depend only on the normal and tangentatial displacement discontinuities:

== Properties ==

Linear Imperfect Interface - Revision history

Nairnj: /* Properties */

Nairnj: /* Properties */

Nairnj: /* Properties */

Yaimene: /* Properties */

Nairnj: /* Properties */

Nairnj: /* Properties */

Nairnj: /* Description */

Nairnj: Created page with "__TOC__ == Description == This imperfect interface contact law assume the normal and tangential tractions are linear and dep..."

Nairnj: Created page with "TOC == Description == This imperfect interface contact law assume the normal and tangential tractions are linear and dep..."