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8/12/2019 CAE-Ch5-2
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1 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Computer-Aided Engineering
()
Chapter 5-2: Truss Elements in ANSYS (II)
Thomas Jin-Chee Liu
Department of Mechanical Engineering
Ming Chi University of Technology
Taishan, Taipei, Taiwan
Feb. 2009
2 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS
Plane truss
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3 / 39Department of Mechanical Engineering, Ming Chi University of Technology
:, 1999.-.:.
4 / 39Department of Mechanical Engineering, Ming Chi University of Technology
(cont.)
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5 / 39Department of Mechanical Engineering, Ming Chi University of Technology
(cont.)
4000
6 / 39Department of Mechanical Engineering, Ming Chi University of Technology
(cont.)
ANSYS,: (1), (2), (3), (4)
, (5)? (6).
: SI (m, N, kg).= 0.0009 m2, = 210
GPa.=300 MPa.
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7 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS
log file
8 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Utility Menu > File > Change Jobname >planetruss
GUI: Utility Menu > File > Change Title > Plane Truss
GUI: Main Menu > Preferences > Structural
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9 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Preprocessor > Element Type > Add/Edit/Delete >Element Types
Add > Link 2D spar 1,OK >Element Types Close
1
10 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Online help
ANSYS Element Reference
Element Library
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11 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Preprocessor > Real Constants > Add/Edit/Delete >Real Constants
Add > Type 1 LINK1,Ok >Real Constant Set2
= 0.0009,OK >Real Constants Close
12 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Preprocessor > Material Props > Material Models >Define Material
Model, Structural, Linear, Elastic, Isotropic2 > Linear
Isotropic EX= 210E9 PRXY=0
truss
Poissons ratio
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13 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI : Main Menu > Preprocessor > Modeling > Create > Nodes > In Active CS >
(),OK.
: NODE X Y Z
1 0.0000 0.0000 0.0000
2 10.000 0.0000 0.0000
3 10.000 10.000 0.0000
4 20.000 0.0000 0.0000
5 30.000 0.0000 0.0000
6 30.000 10.000 0.0000
7 40.000 0.0000 0.0000
14 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
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15 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI : Main Menu > Preprocessor > Modeling > Create > Elements > Elem attributes >
TYPE, MAT, REAL,OK.
16 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
GUI : Main Menu > Preprocessor > Modeling > Create > Elements > Auto Numbered > Thru
Nodes > 2,OK,.
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17 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
18 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
GUI: Utility Menu > Plot Ctrls > Numbering >
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19 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
20 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Solution > Analysis Type > New Analysis
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21 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Solution > Define Loads > Apply > Structural > Displacement > On
Nodes >
22 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
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23 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
24 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
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25 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Solution > Define Loads > Apply > Structural > Force/Moment > On
Nodes >
26 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
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27 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: *.db
GUI: Utility Menu > File > Save as
planetruss.db
28 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > Solution > Solve > Current LS >
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29 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: GUI: Main Menu > General Postproc > Plot Results > Deformed Shape >
30 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > General Postproc > List Results > Reaction Solu >
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31 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS:
GUI: Main Menu > General Postproc > Element Table > Define Table >
32 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
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33 / 39Department of Mechanical Engineering, Ming Chi University of Technology
ANSYS: ()
GUI: Main Menu > General Postproc > Element Table > List Elem Table >
=300 MPa
=F/A
Pa
N
34 / 39Department of Mechanical Engineering, Ming Chi University of Technology
FEM
ANSYS ?
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35 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Online help for Element Table
36 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Online help for Element Table ()
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37 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Files in working directory
38 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Log file
GUI: Utility Menu > File > Read Input from > log file
CAE-Ch5-2-ex2-plane-truss.log
( )
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39 / 39Department of Mechanical Engineering, Ming Chi University of Technology
Unstable case
ok
unstable (r+m