RADIOSS, MotionSolve, and OptiStruct

MAT1

MAT1

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MAT1

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Bulk Data Entry

MAT1 – Material Property Definition, Form 1

Description

Defines the material properties for linear, temperature-independent, and isotropic materials.

Format

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

MAT1

MID

E

G

NU

RHO

A

TREF

GE

 

 

ST

SC

SS

 

 

 

 

 

 

Example

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

MAT1

17

3.+7

 

0.33

4.28

 

 

 

 

 

Field

Contents

MID

Unique material identification number.

No default (Integer > 0)

E

Young’s Modulus.

Default = blank (Real or blank)

G

Shear Modulus.

Default = blank (Real or blank)

NU

Poisson’s Ratio.

Default = blank (-1.0 < Real < 0.5 or blank)

RHO

Mass density.

No default (Real)

A

Thermal expansion coefficient.

No default (Real)

TREF

Reference temperature for thermal loading.

Default = 0.0 (Real)

GE

Structural Element Damping coefficient.  See comments 11 and 12.

No default (Real)

ST, SC, SS

Stress limits in tension, compression and shear.  Used for composite ply failure calculations

No default (Real)

Comments

1.The material identification number must be unique for all MAT1, MAT2, MAT8 and MAT9 entries.
2.The mass density, RHO, is used to automatically compute mass for all structural elements.
3.Either E or G must be specified (i.e., nonblank).
4.If any one of E, G, or NU is blank, it is computed to satisfy the identity
E = 2(1+NU)G; otherwise, values supplied by you are used.
5.If E and NU are both blank, they are both given the value 0.0.
6.If G and NU are both blank, they are both given the value 0.0.
7.Implausible data on one or more MAT1 entries result in a warning message.  Implausible data is defined as
 
E < 0.0 or
 
G < 0.0 or
 
NU > 0.5 or
 
NU < -1.0 or
 
BMP00023-d
 
except for cases covered by comments 5 and 6.
8.It is strongly recommended that only two of the three values E, G, and NU be input.
9.A warning is issued if NU < 0.0.
10.The large field format may also be used.
11.To obtain the damping coefficient GE, multiply the critical damping ratio, cslashco, by 2.0.
12.TREF and GE are ignored if a MAT1 entry is referenced by a PCOMP entry.
13.This card is represented as a material in HyperMesh.  

Element Type

E

NU

G

CROD, CBAR, CBEAM, and CWELD

Axial and Bending

N/A

Transverse Shear and Torsion

CSHEAR

N/A

N/A

Shear

CQUAD and CTRIA

Membrane and Bending

Membrane and Bending

Transverse Shear

CHEX, CTETRA, CPENTA, CPRYRA and CSEAM

Deformation

N/A

See Also

Material Property Checks for MAT1

Go To

Bulk Data Section

Guidelines for Bulk Data Entries

Bulk Data Entries by Function

The Input File