/TH/TRUSS

Block Format Keyword

/TH/TRUSS - Time History - Truss

Description

Describes the time history for trusses.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/TH/TRUSS/thgroup_ID
thgroup_name
var_ID1	var_ID2	var_ID3	var_ID4	var_ID5	var_ID6	var_ID7	var_ID8	var_ID9	var_ID10
elem_ID		elem_name

Field	Contents
thgroup_ID	TH group identifier (Integer, maximum 10 digits)
thgroup_name	TH group name (Character, maximum 100 characters)
var_ID1, ...n	Variables saved for TH (see table below) (Character, maximum 8 characters)
elem_ID	Element identifier (Integer)
elem_name	Name of the element to appear in the time history (Integer, maximum 80 characters)

Keyword	Object saved	Variables
TRUSS	Trusses	OFF, F, IE, A, L, PLAS

Keyword	Variable group	Saved TH Variables
TRUSS	DEF	OFF, F, IE, PLAS

Output	Material law
OFF: element flag for deactivation (see Comment 2)	1, 2
F: normal force	1, 2
IE: internal energy	1, 2
A: area	1, 2
L: initial length	1, 2
PLAS: equivalent plastic strain	2

1.	Available names are listed in the two tables above.

In the first table, TH-variables are listed. If a TH-variable is requested, this variable is written.

In the second table, other variable groups are listed. If a variable group is requested, all the associated TH-variables are written at once.

OFF:

0.0 deleted element
1.0 active element
2.0 (shells / solids): active element using small strain
Negative value -1/-2 when the element is on stand by due to rigid body

Some intermediate values can be found during few cycles before element deletion (progressive reduction of off during a few cycles applies as a multiplicative factor to the stress, so that the stress is progressively vanished and element is deleted after ~ 10 cycles). This process applies to some element types, but not all.