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Transcript of FIOL
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 1 Portland State University, Mechanical Engineering
Abaqus/CAE Truss Tutorial(Version 6.12)
Problem Description:
Given the truss structure shown below with pinned supports at the wall and 1kN applied load; solve fordisplacements of the free node and the reaction forces of the truss structure. The truss material is steel
with E = 210 GPa and =0.25.
This sample problem is similar to the lecture note example.
1000 mm2
1250 mm2
750 mm
1 kN
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 2 Portland State University, Mechanical Engineering
Analysis Steps1. Start Abaqus and choose
to create a new model
database
2. In the model tree double click on the Parts node (or right click on parts and select Create)
3. In the Create Part dialog box (shown above) name the part anda. Select 2D Planarb. Select Deformablec. Select Wired. Set approximate size = 1e. Click Continue
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 3 Portland State University, Mechanical Engineering
4. Create the geometry shown below (details not discussed here)
5. Double click on the Materials node in the model tree
a. Name the new material and give it a description
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 4 Portland State University, Mechanical Engineering
b.Click on the Mechanical tabElasticityElasticc. Define Youngs Modulus and Poissons Ratio (use base SI units)
i. WARNING: There are no predefined system of units within Abaqus, so the user is
responsible for ensuring that the correct values are specified
d. Click OK
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 5 Portland State University, Mechanical Engineering
6. Double click on the Sections node in the model treea. Name the section HorizontalBar and select Beam for both the category and Truss for the
type
b. Click Continuec. Select the material created above (Steel)d. Set cross-sectional area = 0.001 (base SI units, m2)e. Click OK
f. Repeat for the AngledBari. Cross-sectional area=0.00125
7. Expand the Parts node in the model tree, expand the node of the part just created, and double clickon Section Assignments
a. Select the horizontal portion of the geometry in the viewportb. Click Donec. Select the HorizontalBar section created aboved. Click OK
e. Repeat for the angled portion of the geometry
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 6 Portland State University, Mechanical Engineering
8. Expand the Assembly node in the model tree and then double click on Instancesa. Select Dependent for the instance typeb. Click OK
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 7 Portland State University, Mechanical Engineering
9.Double click on the Steps node in the model treea. Name the step, set the procedure to General, and select Static, Generalb. Click Continuec. Give the step a descriptiond. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 8 Portland State University, Mechanical Engineering
10.Expand the Field Output Requests node in the model tree, and then double click on F-Output-1 (F-Output-1 was automatically generated when creating the step)
a. Uncheck the variables Strains and Contactb. Click OK
11.Expand the History Output Requests node in the model tree, and then right click on H-Output-1 (H-Output-1 was automatically generated when creating the step) and select Delete
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 9 Portland State University, Mechanical Engineering
12.Double click on the BCs node in the model treea. Name the boundary conditioned Pinned and select Displacement/Rotation for the typeb. Click Continuec. Select the endpoints on the left (shift select ) and press Done in the prompt aread. Check the U1 and U2 displacements and set them to 0e. Click OK
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7/29/2019 FIOL
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 10 Portland State University, Mechanical Engineering
13.Double click on the Loads node in the model treea. Name the load PointLoad and select Concentrated force as the typeb. Click Continuec. Select the vertex on the right and press Done in the prompt aread. Specify CF2 = -1000e. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 11 Portland State University, Mechanical Engineering
14. In the model tree double click on Mesh for the Truss part, and in the toolbox area click on theAssign Element Type icon
a. Select Standard for element typeb. Select Linear for geometric orderc. Select Truss for familyd. Note that the name of the element (B21) and its description are given below the element
controls
e. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 12 Portland State University, Mechanical Engineering
15. In the toolbox area click on the Seed Edges icona. Select the entire geometryb. Choose method as By numberc. Define the number of elements along the edges as 1d. Click OK
16. In the toolbox area click on the Mesh Part icona. Click Yes in the prompt area
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ME 455/555 Intr
2012 Hormoz
17. In tto Finite Eleme
Zareh
he menu bar
. On the M
. Click OK
t Analysis
select View
esh tab chec
13
Part Displa
Show nod
Fall 20
Options
labels and
12
Portl
Show elem
and State Univers
nt labels
baqus/CAE trus
ity, Mechanical E
tutorial
ngineering
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 14 Portland State University, Mechanical Engineering
18. In the model tree double click on the Job nodea. Name the job Trussb. Click Continuec. Give the job a descriptiond. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 15 Portland State University, Mechanical Engineering
19. In the model tree right click on the job just created (Truss) and select Submita. While Abaqus is solving the problem right click on the job submitted (Truss), and select
Monitor
b. In the Monitor window check that there are no errors or warningsi. If there are errors, investigate the cause(s) before resolving
ii. If there are warnings, determine if the warnings are relevant, some warnings can besafely ignored
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ME 455/555 Intr
2012 Hormoz
20. In tRes
21. In th
22.Displ
to Finite Eleme
Zareh
he model tre
ults
e menu bar c
. Uncheck
. The locatAnnotati
. Click OK
ay the defor
. In Abaqu
. In the tooi.
ii. iii.
t Analysis
e right click o
lick on View
the Show co
ions of viewpns Options
ed contour
6.11 the de
lbox area cli
lot Contour
llow Multipl
lot Undefor
16
n the submit
ortViewp
mpass optio
ort items ca
of the (Von)
ault display f
k on the foll
on Deforme
e Plot States
ed Shape
Fall 20
ted and succ
rt Annotatio
be specified
Mises stress
ield output i
wing icons
d Shape
12
Portl
essfully com
ns Options
on the corr
overlaid with
(Von) Mise
and State Univers
leted job (Tr
sponding ta
the undefor
stress
baqus/CAE trus
ity, Mechanical E
uss), and sel
in the View
med geomet
tutorial
ngineering
ct
ort
ry
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 17 Portland State University, Mechanical Engineering
23. In the toolbox area click on the Common Plot Options icona. Note that the Deformation Scale Factor can be set on the Basic tabb. On the Labels tab check Show element labels, Show node labels, and Show node
symbols
i. *Note* the default label colors may need to be adjusted for visibility. They can bechanged in this option box by clicking on the color and picking a new one.
c. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 18 Portland State University, Mechanical Engineering
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ME 455/555 Intr
2012 Hormoz
24.Toto Finite Eleme
Zareh
etermine th
. This cani. I
ii. I
. In the vie. Click on a. Note that
from the
the node
i. Ts
ii. T. Click Ca
t Analysis
e local stress
e found in t
the menu b
the vertical
port mouse
n element to
Abaqus rep
values deter
he minimum
resses proje
he probe can
cel and the
19
values use t
o locations
r click Tools
icon tool bar
over the ele
store it in th
rts stress val
ined by pro
and maximu
ted to the n
be set to qu
re is no need
Fall 20
e probe feat
Query
ment of inte
e Selected
ues from the
ecting value
m stress valu
des
ery either th
to save the
12
Portl
ure.
robe Values
est
robe Values
integration
s from the su
es contained
elements o
ueried point
and State Univers
portion of t
points, which
rrounding in
in the legen
nodes.
s at this time
baqus/CAE trus
ity, Mechanical E
he dialogue
may differ s
egration poi
are from th
.
tutorial
ngineering
ox
lightly
nts to
e
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 20 Portland State University, Mechanical Engineering
25.To change the displayed output, either:a. Change the field output using the tool bar
option shortcut
b. Use the menu bari. Click on ResultsField
Output
ii. Select U - Spatialdisplacement at nodes
iii. Component = U2iv. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 21 Portland State University, Mechanical Engineering
26.To create a text file containing the stresses, verticaldisplacements, and reaction forces (including the total), in the
menu bar click on ReportField Output
a. For the output variable select (Von) Misesb. On the Setup tab specify the name and the location for
the text file
c. Uncheck the Column totals optiond. Click Apply
e. Back on the Variable tab change the position to Unique Nodalf. Uncheck the stress variable, and select the U2 spatial displacementg. Click Apply
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
2012 Hormoz Zareh 22 Portland State University, Mechanical Engineering
h. On the Variable tab, uncheck Spatial displacement and select the RF2 reaction forcei. On the Setup tab, check the Column totals optionj. Click OK
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ME 455/555 Intro to Finite Element Analysis Fall 2012 Abaqus/CAE truss tutorial
27.Open the .rpt file with any text editor (such as Notepad)a. One thing to check is that the total downward reaction force is equal to the applied load
(1,000 N)
b. Each time Apply is pressed the .rpt file is updated as long as the Append to file option ischecked under Setup