/INIBRI/STRESS

Block Format Keyword Describes the initial state (full stress for the brick, not for each integration points and in local reference system) for a brick.

Format

(1)	(3)	(5)	(7)
/INIBRI/STRESS/`unit_ID`
`bric_ID`_st	$σ_{x}$	$σ_{y}$	$σ_{z}$
$σ_{x y}$	$σ_{y z}$	$σ_{x z}$

Definitions

Field	Contents	SI Unit Example
`unit_ID`	Unit Identifier (Integer, maximum 10 digits)
`bric_ID`_st	Stress element identifier (Integer)
$σ_{x}$	Stress (Real)
$σ_{y}$	Stress (Real)
$σ_{z}$	Stress (Real)
$σ_{x y}$	Shear stress (Real)
$σ_{y z}$	Shear stress (Real)
$σ_{x z}$	Shear stress (Real)

Comments

The initial state for brick may be defined by more than one block.
Using /INIBRI/STRSESS you are assuming there is no density of the deformed elements. Before the first cycle Radioss will check consistency of the input stress tensor with material data (stiffness and density).(1)
$D = \frac{s_{11} + s_{22} + s_{33}}{3} - B u l k \cdot (1 - \frac{ρ}{ρ_{0}}) = 0$

Where,

$ρ_{0}$

Density defined in the Starter file

$ρ$

Density in the state file

If the stress is not fulfilled, then Radioss will correct the diagonal entry of the stress tensor:(2)
$s_{i i}^{n e w} = s_{i i}^{i n i t i a l} - D$