/MAT/PLAS_PREDEF

Block Format Keyword This material law has predefined elasto-plastic data for some common steel, aluminum, and plastic materials.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/MAT/PLAS_PREDEF/`mat_ID`
`mat_title`
`Material name`

Definitions

Field	Contents	SI Unit Example
`mat_ID`	Material identifier. (Integer, maximum 10 digits)
`mat_title`	Material title. (Character, maximum 100 characters)
`Material name`	Predefined material name. 3 STEEL Mild steel HSS High strength steel UHSS Ultra-high strength steel AA5182 Aluminum AA5182 AA6082 Aluminum AA6082-T6 PA6GF30 Plastic PA6GF30 PPT40 Plastic PP T40 (Character, must be left-justified when entered)

Field

Contents

SI Unit Example

mat_ID

Material identifier.

(Integer, maximum 10 digits)

mat_title

Material title.

(Character, maximum 100 characters)

Material name

Predefined material name. 3

STEEL: Mild steel
HSS: High strength steel
UHSS: Ultra-high strength steel
AA5182: Aluminum AA5182
AA6082: Aluminum AA6082-T6
PA6GF30: Plastic PA6GF30
PPT40: Plastic PP T40

(Character, must be left-justified when entered)

Example

#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#-  2. MATERIALS:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/PLAS_PREDEF/1
Material for generic mild steel
#
STEEL
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
/END
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

Comments

This material provides elasto-plastic material data that can be used early in a design when material data might not be available. The data is from the results of several publicly funded projects. The material model defines stress as a function of strain. No strain rate or temperature effects are included. Failure can be modeled by using the same predefined materials in /FAIL/BIQUAD.
The material data is automatically converted into the model’s unit system defined in /BEGIN.

This material uses /MAT/LAW2 (PLAS_JOHNS), I_flag=1 with these predefined values in the units, kg, mm, and ms.

Name	Material Description	Density	E	$ν$	Yield Stress	UTS	$ε_{U T S}$
STEEL	Mild steel	7.8E-6	210	0.3	0.160	0.380	0.24
HSS	HSS steel	7.8E-6	210	0.3	0.300	0.510	0.23
UHSS	UHSS steel	7.8E-6	210	0.3	0.500	1.500	0.045
AA5182	Aluminum AA5182	2.7E-6	70	0.33	0.150	0.300	0.25
AA6082-T6	Aluminum AA6082-T6	2.7E-6	70	0.33	0.300	0.360	0.08
PA6GF30	Plastic PA6GF30	1.3E-6	7	0.35	0.050	0.100	0.02
PPT40	Plastic PP T40	1.2E-6	4	0.3	0.020	0.030	0.06

Where,

E: Young's modulus
$ν$: Poisson's ratio
Yield Stress: Material yield stress
UTS: Ultimate Tensile Stress (engineering stress)
$ε_{U T S}$: Engineering strain at UTS

Note: Altair does not assume any responsibility for the validity, accuracy or any results obtained from these values. The user must verify his own values by test results. Usage is only recommended for early design exploration.