p_spring

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p_spring

Purpose

Element property function for spring and rigid elements

Syntax

il=p_spring('default') 
il=p_spring('database MatId Value')
il=p_spring('dbval MatId Value')
il=p_spring('dbval -unit TM ProId name');

Description

This help starts by describing the main commands : p_spring Database and Dbval. Supported p_spring subtypes and their formats are then described.

[Database,Dbval] ...

Element properties are described by the row of an element property matrix or a data structure with an .il field containing this row (see section 7.4).

Examples of database property construction

 il=p_spring('database 100 1e12 1e4 0')
 il=p_spring('dbval 100 1e12');
 il=fe_mat('convert SITM',il);
 il=p_spring(il,'dbval 2 -unit TM 1e12')

p_spring currently supports 2 subtypes

1 : standard

  [ProID type  k m c Eta S]

ProID	property identification number
type	identifier obtained with fe_mat('p_spring','SI',1)
k	stiffness value
m	mass value
c	viscous damping value
eta	loss factor
S	Stress coefficient

2 : bush

  [ProId Type k11:k66 c11:c66 Eta SA ST EA ET m v]

ProID	property identification number
type	identifier obtained with fe_mat('p_spring','SI',2)
ki	stiffness for each direction
ci	viscous damping for each direction
SA	stress recovery coef for translations
ST	stress recovery coef for rotations
EA	strain recovery coef for translations
ET	strain recovery coef for rotations
m	mass
v	volume

See also

Section 4.2.1, section 7.4, fe_mat