Code_Aster
®
Version
8.1
Titrate:
Modelings PLAN_JOINT, AXIS_JOINT, PLAN_ELDI and AXIS_ELDI
Date:
15/02/06
Author (S):
J. LAVERNE, F. LEBOUVIER
Key
:
U3.13.14-C
Page
:
1/4
Instruction manual
U3.13 booklet: Mechanical finite elements 2D
HT-62/06/004/A
Organization (S):
EDF-R & D/AMA, DeltaCAD
Instruction manual
U3.13 booklet: Mechanical finite elements 2D
Document: U3.13.14
Modelings PLAN_JOINT, AXIS_JOINT,
PLAN_ELDI and AXIS_ELDI
Summary:
This document describes for modelings PLAN_JOINT, AXIS_JOINT, PLAN_ELDI and AXIS_ELDI:
·
degrees of freedom carried by the finite elements which support modeling,
·
the related meshs supports,
·
supported loadings,
·
nonlinear possibilities,
·
case-tests implementing modelings.
Modelings PLAN_JOINT and AXIS_JOINT (Phenomenon: MECHANICS) correspond to elements
stop of gasket, they are QUAD4 degenerated into SEG2 modelizing the lips of a fissure. Such elements
stop can support the laws of behavior CZM_EXP_REG (law of cohesive forces of Barenblatt type:
to see Doc. [R7.02.11]) and JOINT_BA.
Modelings PLAN_ELDI and AXIS_ELDI (Phenomenon: MECHANICS) correspond to elements with
internal discontinuity, they are voluminal elements (QUAD4) crossed by a discontinuity. It allow
also to modelize the opening of a fissure. Such finite elements can support only one law of
behavior: CZM_EXP (law of cohesive forces of Barenblatt type: to see Doc. [R7.02.12]).
Thereafter, symbol XXX corresponds to “PLAN” or “AXIS”.
Code_Aster
®
Version
8.1
Titrate:
Modelings PLAN_JOINT, AXIS_JOINT, PLAN_ELDI and AXIS_ELDI
Date:
15/02/06
Author (S):
J. LAVERNE, F. LEBOUVIER
Key
:
U3.13.14-C
Page
:
2/4
Instruction manual
U3.13 booklet: Mechanical finite elements 2D
HT-62/06/004/A
1 Discretization
1.1
Degrees of freedom
Modeling
Degrees of freedom (with each node node)
XXX_JOINT
DX: displacement following X
DY: displacement following Y
XXX_ELDI
DX: displacement following X
DY: displacement following Y
1.2
Net support of the matrices of rigidity
The meshs supports of the finite elements are quadrangles. The elements are isoparametric.
Modeling Nets Interpolation
Remarks
Linear XXX_JOINT QUAD4
Linear XXX_ELDI QUAD4
2 Possibilities
non-linear
2.1
Law of behaviors
Laws of behaviors specific to these modelings, usable under COMP_INCR in
STAT_NON_LINE and DYNA_NON_LINE are as follows (cf [U4.51.11]):
/“CZM_EXP_REG”
Supported modelings: PLAN_JOINT, AXIS_JOINT
/“CZM_EXP”
Supported modelings: PLAN_ELDI, AXIS_ELDI
/“JOINT_BA”
Supported modelings: PLAN_JOINT, AXIS_JOINT
2.2 Deformations
Only the linearized deformations “SMALL” key word under DEFORMATION are available in
relations of behavior (cf [U4.51.11]).
Code_Aster
®
Version
8.1
Titrate:
Modelings PLAN_JOINT, AXIS_JOINT, PLAN_ELDI and AXIS_ELDI
Date:
15/02/06
Author (S):
J. LAVERNE, F. LEBOUVIER
Key
:
U3.13.14-C
Page
:
3/4
Instruction manual
U3.13 booklet: Mechanical finite elements 2D
HT-62/06/004/A
3
Examples of implementation: case-tests
·
PLAN_JOINT
Statique
non-linear
SSNP118A [V6.03.118]: Case-test of validation of the element gasket plane 2D with a law of
behavior of the type CZM_EXP_RÉG.
SSNP128A [V6.03.128]: Validation of the element with internal discontinuity and law CZM_EXP
on a plane plate.
SSNP126A [V6.03.126]: Case-test of validation of the law of behavior JOINT_BA (connection
steel-concrete) with an element of gasket plane 2D.
·
AXIS_JOINT
Statique
non-linear
SSNA112A [V6.01.112]: Test of wrenching carried out by Borderie & Pijaudier - Pooch
for the study of the steel-concrete connection with the law of behavior JOINT_BA.
SSNA115A [V6.01.115]
: Wrenching of a rigid reinforcement with elements with
discontinuity.
Code_Aster
®
Version
8.1
Titrate:
Modelings PLAN_JOINT, AXIS_JOINT, PLAN_ELDI and AXIS_ELDI
Date:
15/02/06
Author (S):
J. LAVERNE, F. LEBOUVIER
Key
:
U3.13.14-C
Page
:
4/4
Instruction manual
U3.13 booklet: Mechanical finite elements 2D
HT-62/06/004/A
Intentionally white left page.