/PROP/TYPE21 (TSH

Block Format Keyword

/PROP/TYPE21 - Orthotropic Thick Shell Property Set

Description

This property is used to define the orthotropic thick shell property set.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/PROP/TYPE21/prop_ID/unit_ID or /PROP/TSH_ORTH/prop_ID/unit_ID
prop_title
Isolid	Ismstr		Icpre	Icstr	Inpts			dn
qa		qb
VX		VY		VZ		skew_ID	Iorth

Field

Contents

SI Unit Example

prop_ID

Property identifier

(Integer, maximum 10 digits)

unit_ID

Optional unit identifier

(Integer, maximum 10 digits)

prop_title

Property title

(Character, maximum 100 characters)

Isolid

Solid elements formulation flag

(Integer)

= 14: HA8 locking-free 8-node thick shell, co-rotational, full integration, variable number of Gauss points in all directions.

= 15: HSEPH/PA6 thick shell (8-node and 6-node respectively), co-rotational, under integrated (1-point in-plan quadrature) with physical stabilization, variable number of integration points in thickness direction.

Ismstr

Small strain formulation flag

(Integer)

= 0: default, set to value defined in /DEF_SOLID

= 1: small strain from time =0

= 2: full geometric nonlinearities with possible small strain formulation in RADIOSS Engine (/DT/BRICK/CST)

= 3: simplified small strain formulation from time =0 (non-objective formulation)

= 4: full geometric nonlinearities (/DT/BRICK/CST has no effect)

Icpre

Constant pressure formulation flag

(Integer)

= 0: no reduced pressure formulation

= 1: reduced pressure formulation

= 2: variable state between Icpre =0 and Icpre =1 in function of plasticity

Icstr

Constant stress formulation flag (HA8 only)

(Integer)

= 001: reduced stress integration in t direction

= 010: reduced stress integration in s direction

= 100: reduced stress integration in r direction

Inpts

Number of integration points

(Integer)

= j:	1 < j < 9 for Isolid =15

= ijk:

2 < i,j,k < 9 for Isolid =14

where:

i = number of integration points in r direction

j = number of integration points in s direction

k = number of integration points in t direction

Numerical damping for stabilization (Isolid = 15 only)

Default = 0.1 (Real)

Quadratic bulk viscosity

Default = 1.10 (Real)

Default = 0.0 for /MAT/LAW70

Linear bulk viscosity

Default = 0.05 (Real)

Default = 0.0 for /MAT/LAW70

X component for reference vector

(Real)

Y component for reference vector

(Real)

Z component for reference vector

(Real)

skew_ID

Skew identifier

If the local skew has been defined, its X-axis replaces the reference vector (VX, Vy, and VZ will be ignored).

(Integer)

Iorth

Orthotropic system formulation flag for reference vector

Default = 0 (Integer)

= 0: the first axis of orthotropy is maintained at constant angle with respect to the orthonormal co-rotational element coordinate system.

= 1: the first orthotropy direction is constant with respect to a non-orthonormal isoparametric coordinates.

Angle of the first direction of orthotropy

(Real)

Minimum time step

Default = 106 (Real)

prop_type21_example

Skew and angle ψ to define the material direction (fiber direction) m1.

#RADIOSS STARTER

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

#- 1. SKEWS & FRAMES:

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

/SKEW/FIX/1

New SKEW 1

# OX OY OZ

0 100 0

# X1 Y1 Z1

1 1 0

# X2 Y2 Z2

-.408248290463863 .408248290463863 .816496580927726

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

#- 2. LOCAL_UNIT_SYSTEM:

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

/UNIT/2

unit for prop

# MUNIT LUNIT TUNIT

kg mm ms

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

#- 3. GEOMETRICAL SETS:

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

/PROP/TYPE21/1/2

TSH_ORTH example

# Isolid Ismstr Icpre Icstr Inpts dn

14 0 1 010 222 0

# q_a q_b

0 0

# Vx Vy Vz skew_ID Iorth

0 0 0 1 0

# Ortho_angle

# dt_min

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

#enddata

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

1.	HA8 element must use constant stress formulation.

2.	Small strain:

If the small strain option is set, the strains and stresses used in material laws are engineering strains and stresses. Otherwise, they are true strains and stresses.

3.	For post-processing solid element stress, refer to /ANIM/BRICK/TENS/STRESS for animation and /TH/BRIC for plot files.

4.	Flag Icpre =2 is only available for elastoplastic laws.

5.	The thick shell orthotropy is planar and the third orthotropy direction is coincident with the normal to the shell plane.

6.	Global vector V or skew_ID is used to define the othotropy direction.

7.	The is an angle, in degrees, between the first direction of orthotropy and projection of reference vector on the shell mean plane (r and t).

prop_type21_image

8.	When this property is used with /MAT/LAW1, with Isolid =15 and number of integration points is different from 1, the number of integration points is set to 2 (enough to compute correct bending).

/PROP/TYPE21 (TSH_ORTH)

/PROP/TYPE21 (TSH_ORTH)

/PROP/TYPE21 (TSH_ORTH)