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/MAT/LAW40 (KELVINMAX)

/MAT/LAW40 (KELVINMAX)

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/MAT/LAW40 (KELVINMAX)

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/MAT/LAW40 - Generalized Maxwell-Kelvin Material

Description

This law describes the generalized Maxwell-Kelvin material. This law can only be used with solid elements.

Format

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/MAT/LAW40/mat_ID/unit_ID or /MAT/KELVINMAX/mat_ID/unit_ID

mat_title

 

 

 

 

 

 

 

 

K

Astass

Bstass

Kvm

G1

G2

G3

G4

G5

hmtoggle_plus1Flag Definition

Field

Contents

SI Unit Example

mat_ID

Material identifier

(Integer, maximum 10 digits)

 

unit_ID

Optional unit identifier

(Integer, maximum 10 digits)

 

mat_title

Material title

(Character, maximum 100 characters)

 

Initial density

(Real)

K

Bulk modulus

(Real)

Long time shear modulus

(Real)

Astass

Stassi A coefficient

(Real)

Bstass

Stassi B coefficient

(Real)

Kvm

von Mises coefficient

(Real)

 

G1

Shear modulus 1

(Real)

G2

Shear modulus 2

(Real)

G3

Shear modulus 3

(Real)

G4

Shear modulus 4

(Real)

G5

Shear modulus 5

(Real)

Time decay constant 1

(Real)

 

Time decay constant 2

(Real)

 

Time decay constant 3

(Real)

 

Time decay constant 4

(Real)

 

Time decay constant 5

(Real)

 
hmtoggle_plus1Example (Elastic Rubber)

#RADIOSS STARTER

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/UNIT/1

unit for mat

                 Mg                  mm                   s

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#-  2. MATERIALS:

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/MAT/KELVINMAX/1/1

LAW40 elastic rubber

#              RHO_I

                1E-9

#                  K               G_inf              Astass              Bstass                 Kvm

                8.97                   3                   0                   0                   0

#                 G1                  G2                  G3                  G4                  G5

                   0                   0                   0                   0                   0

#              BETA1               BETA2               BETA3               BETA4               BETA5

                   0                   0                   0                   0                   0

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#ENDDATA

/END

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
hmtoggle_plus1Comments
1.Shear modulus is computed using the following equation:

with

Where is the relaxation time.

2.Variables Kvm, Astass, and Bstass are not used in this material law; except for some output in user variables.
3.Poisson number "NU" () is calculated automatically with bulk modulus K and initial shear modulus G at time= 0, as shown below:

Where, initial shear modulus

Poisson number "NU" () must be positive and .

See Also:

Material Compatibility

Law Compatibility with Failure Model

/MAT/LAW40 in Theory Manual

Example 52 - Creep and Stress Relaxation