Bistable Isotropic Material - Revision history

Nairnj: /* Material Properties */

2015-06-03T00:14:50Z

Material Properties

← Older revision		Revision as of 00:14, 3 June 2015
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	\| alphad \|\| Thermal expansion coefficient for transformed state \|\| ppm/K \|\| 40		\| alphad \|\| Thermal expansion coefficient for transformed state \|\| ppm/K \|\| 40
	\|-		\|-
	\| kCondd \|\| Thermal conductivity for transformed state \|\| ~~W/(m-K)~~ \|\| 0		\| kCondd \|\| Thermal conductivity for transformed state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|conductivity units]]\|\| 0
	\|-		\|-
	\| betad \|\| Solvent expansion coefficien for transformed statet \|\| 1/(wt fraction) \|\| 0		\| betad \|\| Solvent expansion coefficien for transformed statet \|\| 1/(wt fraction) \|\| 0
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	\| critical \|\| The critical volumetric strain to induce a dilation transition (in precent strain), critical strain invariant to induce a distortion transition (in percent strain), or critical Von Mises stress to induce a vonmises transition (in [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]]). \|\| varies \|\| none		\| critical \|\| The critical volumetric strain to induce a dilation transition (in precent strain), critical strain invariant to induce a distortion transition (in percent strain), or critical Von Mises stress to induce a vonmises transition (in [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]]). \|\| varies \|\| none
	\|-		\|-
	\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0		\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|alt strain units]] \|\| 0
	\|-		\|-
	\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). In <tt>XML</tt> files, use a <tt><reversible/></tt> or an <tt><irreversible/></tt> element to set the type of transition. \|\| none \|\| no		\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). In <tt>XML</tt> files, use a <tt><reversible/></tt> or an <tt><irreversible/></tt> element to set the type of transition. \|\| none \|\| no

Nairnj: /* Material Properties */

2015-06-03T00:14:14Z

Material Properties

← Older revision		Revision as of 00:14, 3 June 2015
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	\| alpha0 \|\| Thermal expansion coefficient for initial state \|\| ppm/K \|\| 40		\| alpha0 \|\| Thermal expansion coefficient for initial state \|\| ppm/K \|\| 40
	\|-		\|-
	\| kCond0 \|\| Thermal conductivity for initial state \|\| ~~W/(m-K)~~ \|\| 0		\| kCond0 \|\| Thermal conductivity for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|conductivity units]] \|\| 0
	\|-		\|-
	\| beta0 \|\| Solvent expansion coefficien for initial statet \|\| 1/(wt fraction) \|\| 0		\| beta0 \|\| Solvent expansion coefficien for initial statet \|\| 1/(wt fraction) \|\| 0

Nairnj at 22:00, 2 June 2015

2015-06-02T22:00:44Z

Nairnj at 21:46, 2 June 2015

2015-06-02T21:46:16Z

← Older revision		Revision as of 21:46, 2 June 2015
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	\| beta0 \|\| Solvent expansion coefficien for initial statet \|\| 1/(wt fraction) \|\| 0		\| beta0 \|\| Solvent expansion coefficien for initial statet \|\| 1/(wt fraction) \|\| 0
	\|-		\|-
	\| D0 \|\| Solvent diffusion constant for initial state \|\| ~~mm<sup>2</sup>/sec~~ \|\| 0		\| D0 \|\| Solvent diffusion constant for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|diffusion units]] \|\| 0
	\|-		\|-
	\| Kd \|\| Bulk modulus for transformed state \|\| MPa \|\| none		\| Kd \|\| Bulk modulus for transformed state \|\| MPa \|\| none
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	\| betad \|\| Solvent expansion coefficien for transformed statet \|\| 1/(wt fraction) \|\| 0		\| betad \|\| Solvent expansion coefficien for transformed statet \|\| 1/(wt fraction) \|\| 0
	\|-		\|-
	\| Dd \|\| Solvent diffusion constant for transformed state \|\| ~~mm<sup>2</sup>/sec~~ \|\| 0		\| Dd \|\| Solvent diffusion constant for transformed state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|diffusion units]] \|\| 0
	\|-		\|-
	\| transition \|\| Set to "dilation" (or 1), "distortion" (or 2), or "vonmises" (or 3) to select the transition model \|\| none \|\| dilation		\| transition \|\| Set to "dilation" (or 1), "distortion" (or 2), or "vonmises" (or 3) to select the transition model \|\| none \|\| dilation

Nairnj: /* Material Properties */

2014-01-02T20:49:54Z

Material Properties

← Older revision		Revision as of 20:49, 2 January 2014
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	\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0		\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0
	\|-		\|-
	\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). In <tt>XML</tt> files, use a <tt><reversible/></tt> or an <tt><irreversible></tt> element to set the type of transition. \|\| none \|\| no		\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). In <tt>XML</tt> files, use a <tt><reversible/></tt> or an <tt><irreversible/></tt> element to set the type of transition. \|\| none \|\| no
	\|-		\|-
	\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies		\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies

Nairnj: /* Material Properties */

2014-01-02T20:49:31Z

Material Properties

← Older revision		Revision as of 20:49, 2 January 2014
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	\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0		\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0
	\|-		\|-
	\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). \|\| none \|\| ~~yes~~		\| reversible \|\| Make the transition reversible (if "yes" or 1) or irreversible (if "no" or 0). In <tt>XML</tt> files, use a <tt><reversible/></tt> or an <tt><irreversible></tt> element to set the type of transition. \|\| none \|\| no
	\|-		\|-
	\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies		\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies

Nairnj: /* Material Properties */

2013-12-28T17:31:21Z

Material Properties

← Older revision		Revision as of 17:31, 28 December 2013
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	\|}		\|}

	The state properties can only be entered using bulk and shear moduli. See [[Isotropic ~~Materials~~#Material Properties\|these relations]] to covert other properties (such as modulus and Poisson's ratio) to bulk and shear moduli.		The state properties can only be entered using bulk and shear moduli. See [[Isotropic Material#Material Properties\|these relations]] to covert other properties (such as modulus and Poisson's ratio) to bulk and shear moduli.

	== History Variables ==		== History Variables ==

Nairnj: /* Material Properties */

2013-12-28T17:30:50Z

Material Properties

← Older revision		Revision as of 17:30, 28 December 2013
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	\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies		\| ([[Common Material Properties\|other]]) \|\| Properties common to all materials \|\| varies \|\| varies
	\|}		\|}

			The state properties can only be entered using bulk and shear moduli. See [[Isotropic Materials#Material Properties\|these relations]] to covert other properties (such as modulus and Poisson's ratio) to bulk and shear moduli.

	== History Variables ==		== History Variables ==

Nairnj: /* History Variables */

2013-12-28T17:29:02Z

History Variables

← Older revision		Revision as of 17:29, 28 December 2013
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	== History Variables ==		== History Variables ==

	History variable 1 will be 0 for the initial state and 1 for the deformed state after a transition~~. This variable can be archived as history1~~.		History variable 1 will be 0 for the initial state and 1 for the deformed state after a transition.

	== Examples ==		== Examples ==

Nairnj: /* Constitutive Law */

2013-12-28T17:27:53Z

Constitutive Law

← Older revision		Revision as of 17:27, 28 December 2013
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	== Constitutive Law ==		== Constitutive Law ==

	This [[Material Models\|MPM material]] ~~(or [[FEA Material Models\|FEA material]])~~ is two small-strains materials (each with same constitutive law as an [[Isotropic Material\|isotropic material]]). The two material states are linked by transition ~~rules~~ and the transition between the two states can be reversible or irreversible.		This [[Material Models\|MPM material]] is two small-strains materials (each with same constitutive law as an [[Isotropic Material\|isotropic material]]). The two material states are linked by a transition rule and the transition between the two states can be reversible or irreversible.

	The transition between the two states is determined either by a "dilation" rule, a "distortion" rule, or a "Von Mises" stress rule (as determined by the <tt>transition</tt> property). With a dilation rule, the transition occurs when the volumetric strain		The transition between the two states is determined either by a "dilation" rule, a "distortion" rule, or a "Von Mises" stress rule (as determined by the <tt>transition</tt> property). With a dilation rule, the transition occurs when the volumetric strain
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	<math>\sigma_{VM} = \sqrt{\sum_{i,j}\sigma_{ij}'\sigma_{ij}'}</math>		<math>\sigma_{VM} = \sqrt{\sum_{i,j}\sigma_{ij}'\sigma_{ij}'}</math>

	where <math>\sigma_{ij}'</math> is is deviatoric stress, reaches a critical value. When using a dilation rule, the new stress-strain relation can include a changed offset in volumetric strain corresponding to stress-free conditions at a non-zero dilation relative to the initial state (see <tt>DeltaVOffset</tt> property). This change normally leads to an instantaneous change in stress upon transition. When using a distortion or Von Mises stress rule, the offset is ignored and the change is only a change in slope of mechanical properties.		where <math>\sigma_{ij}'</math> is is deviatoric stress, reaches a critical value. When using a dilation rule, the new stress-strain relation can include a changed offset in volumetric strain corresponding to stress-free conditions at a non-zero dilation relative to the initial state (see <tt>DeltaVOffset</tt> property). This change normally leads to an instantaneous change in stress upon transition. When using a distortion or Von Mises stress rule, the offset is ignored and the change is only a change in slope of mechanical properties.

	== Material Properties ==		== Material Properties ==

← Older revision		Revision as of 22:00, 2 June 2015
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	! Property !! Description !! Units !! Default		! Property !! Description !! Units !! Default
	\|-		\|-
	\| K0 \|\| Bulk modulus for initial state \|\| ~~MPa~~ \|\| none		\| K0 \|\| Bulk modulus for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]] \|\| none
	\|-		\|-
	\| G0 \|\| Shear modulus for initial state \|\| ~~MPa~~ \|\| none		\| G0 \|\| Shear modulus for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]] \|\| none
	\|-		\|-
	\| alpha0 \|\| Thermal expansion coefficient for initial state \|\| ppm/K \|\| 40		\| alpha0 \|\| Thermal expansion coefficient for initial state \|\| ppm/K \|\| 40
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	\| D0 \|\| Solvent diffusion constant for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|diffusion units]] \|\| 0		\| D0 \|\| Solvent diffusion constant for initial state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|diffusion units]] \|\| 0
	\|-		\|-
	\| Kd \|\| Bulk modulus for transformed state \|\| ~~MPa~~ \|\| none		\| Kd \|\| Bulk modulus for transformed state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]] \|\| none
	\|-		\|-
	\| Gd \|\| Shear modulus for transformed state \|\| ~~MPa~~ \|\| none		\| Gd \|\| Shear modulus for transformed state \|\| [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]] \|\| none
	\|-		\|-
	\| alphad \|\| Thermal expansion coefficient for transformed state \|\| ppm/K \|\| 40		\| alphad \|\| Thermal expansion coefficient for transformed state \|\| ppm/K \|\| 40
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	\| transition \|\| Set to "dilation" (or 1), "distortion" (or 2), or "vonmises" (or 3) to select the transition model \|\| none \|\| dilation		\| transition \|\| Set to "dilation" (or 1), "distortion" (or 2), or "vonmises" (or 3) to select the transition model \|\| none \|\| dilation
	\|-		\|-
	\| critical \|\| The critical volumetric strain to induce a dilation transition (in precent strain), critical strain invariant to induce a distortion transition (in percent strain), or critical Von Mises stress to induce a vonmises transition (in ~~MPa~~). \|\| varies \|\| none		\| critical \|\| The critical volumetric strain to induce a dilation transition (in precent strain), critical strain invariant to induce a distortion transition (in percent strain), or critical Von Mises stress to induce a vonmises transition (in [[ConsistentUnits Command#Legacy and Consistent Units\|pressure units]]). \|\| varies \|\| none
	\|-		\|-
	\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0		\| DeltaVOffset \|\| An offset volumetric strain in the transformed state. This property only applies for dilation rule. \|\| % \|\| 0