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Linear Static Analysis (Elasticity)¶
For this analysis, the data in tutorial/01_elastic_hinge is used.
Analysis target¶
The analysis object is a hinge part, and the geometry is shown in Figure 4.1.1 and the mesh data in Figure 4.1.2.
| Item | Description | Notes | Reference |
|---|---|---|---|
| Type of analysis | Linear static analysis | !SOLUTION,TYPE=STATIC | |
| Number of nodes | 84,056 | ||
| Number of elements | 49,871 | ||
| Element type | 10-node quadratic tetrahedral element | !ELEMENT,TYPE=342 | Element Library |
| Material name | STEEL | !MATERIAL,NAME=STEEL | Material Data |
| Material properties | ELASTIC | !ELASTIC | |
| Boundary conditions | Restraint, concentrated load | ||
| Matrix solver | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Fig. 4.1.1 : Shape of the hinge part
Fig. 4.1.2 : Mesh data of the hinge part
Analysis content¶
Extract the source code of FrontISTR and go to the directory of this example to see if you can find the files necessary for analysis.
| File name | Type | Role |
|---|---|---|
hecmw_ctrl.dat |
Global control data | Specifies the input and output files for mesh data and analysis control data. |
hinge.cnt |
Analysis control data | Defines the analysis type, displacement boundary conditions, concentrated loads, etc., and also specifies solver and visualizer control. |
hinge.msh |
Mesh data | Defines the finite element mesh together with its material and section data. |
Confirm that these files are present.
Output:
A stress analysis is performed by restraining the displacement of the constrained surface shown in Figure 4.1.1 and applying a concentrated load to the loading surface. The global control data and analysis control data are shown below.
Global control data hecmw_ctrl.dat¶
Specifies the input and output files for the mesh data and analysis control data.
#
# for solver
#
!MESH, NAME=fstrMSH, TYPE=HECMW-ENTIRE # 単一メッシュデータを指定
hinge.msh
!CONTROL, NAME=fstrCNT # 解析制御データを指定
hinge.cnt
!RESULT, NAME=fstrRES, IO=OUT # 結果データを指定
hinge.res
!RESULT, NAME=vis_out, IO=OUT # 可視化データを指定
hinge_vis
Analysis control data hinge.cnt¶
Defines the analysis type, displacement boundary conditions, concentrated loads, etc., and also specifies control of the solver and visualizer.
# Control File for FISTR
## Analysis Control
!VERSION # ファイルフォーマットのバージョンを指定
3
!SOLUTION, TYPE=STATIC # 解析の種別を指定
!WRITE,RESULT # 結果データ出力の指定
!WRITE,VISUAL # 可視化データの出力を指定
## Solver Control
### Boundary Condition
!BOUNDARY
BND0, 1, 3, 0.000000 # 拘束面1を指定
!BOUNDARY
BND1, 1, 3, 0.000000 # 拘束面2を指定
!CLOAD
CL0, 1, 0.01000 # 強制面を指定
### Material
!MATERIAL, NAME=STEEL # 材料物性の指定
!ELASTIC # 弾性物質の定義
210000.0, 0.3
!DENSITY # 質量密度の定義
7.85e-6
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=YES,TIMELOG=YES # ソルバーの制御
10000, 1
1.0e-08, 1.0, 0.0
## Post Control
!VISUAL,method=PSR # 可視化手法の指定
!surface_num=1 # 1つのサーフェースレンダリング内のサーフェース数
!surface 1 # サーフェースの内容の指定
!output_type=VTK # 可視化ファイルの型の指定
!END # 解析制御データの終わりを示す
Mesh data¶
Defines the finite element mesh together with its material data and section data.
(Some only)
!HEADER
HECMW_Msh File generated by REVOCAP
!NODE
1, -1.22042, 2.23355, 1.65220
2, -1.27050, -3.10529, 1.59209
...
!ELEMENT, TYPE=342
1, 1157, 3549, 3321, 3739, 12629, 12627, 12626, 12628, 12631, 12630
2, 8207, 3321, 3549, 3739, 12629, 12633, 12632, 12634, 12630, 12631
...
!MATERIAL, NAME=STEEL, ITEM=2
!ITEM=1, SUBITEM=2
210000.0, 0.3
!ITEM=2, SUBITEM=1
7.85e-6
!SECTION, TYPE=SOLID, EGRP=Solid0, MATERIAL=STEEL
!EGROUP, EGRP=Solid0
1
2
...
!END
Analysis procedure¶
Execute the FrontISTR command fistr1.
(Runs in 4 threads.)
##################################################################
# FrontISTR
#
##################################################################
---
version: 5.1.0
git_hash: acab000c8c633b7b9d596424769e14363f720841
build:
date: 2020-10-05T07:39:55Z
MPI: enabled
OpenMP: enabled
option: "-p --with-tools --with-refiner --with-metis --with-mumps --with-lapack --with-ml --with-mkl "
HECMW_METIS_VER: 5
execute:
date: 2020-10-07T10:01:16+0900
processes: 1
threads: 4
cores: 4
host:
0: flow-p06
---
...
Step control not defined! Using default step=1
fstr_setup: OK
Start visualize PSF 1 at timestep 0
loading step= 1
sub_step= 1, current_time= 0.0000E+00, time_inc= 0.1000E+01
loading_factor= 0.0000000 1.0000000
### 3x3 BLOCK CG, SSOR, 1
1 1.903375E+00
2 1.974378E+00
3 2.534627E+00
...
...
2967 1.080216E-08
2968 1.004317E-08
2969 9.375729E-09
### Relative residual = 9.39429E-09
### summary of linear solver
2969 iterations 9.394286E-09
set-up time : 1.953022E-01
solver time : 5.704201E+01
solver/comm time : 5.145826E-01
solver/matvec : 2.306329E+01
solver/precond : 2.632665E+01
solver/1 iter : 1.921253E-02
work ratio (%) : 9.909789E+01
Start visualize PSF 1 at timestep 1
### FSTR_SOLVE_NLGEOM FINISHED!
====================================
TOTAL TIME (sec) : 59.99
pre (sec) : 0.71
solve (sec) : 59.29
====================================
FrontISTR Completed !!
The analysis is completed when FrontISTR Completed !! is displayed, the analysis is done.
Analysis results¶
Once the analysis is complete, several new files will be created.
Output:
0.log hecmw_ctrl.dat hinge.res.0.0 hinge_vis_psf.0001
FSTR.dbg.0 hecmw_vis.ini hinge.res.0.1 hinge_vis_psf.0001.pvtu
FSTR.msg hinge.cnt hinge_vis_psf.0000
FSTR.sta hinge.msh hinge_vis_psf.0000.pvtu
The *.res.* is the result data of FrontISTR, which can be displayed by REVOCAP_PrePost and so on.
The *_vis_* is called visualization data, and can be displayed by general-purpose visualization software. In this example, the data is output in VTK format, so it can be displayed using ParaView and other visualization software.
A contour plot for the Mises stresses is created by REVOCAP_PrePost and shown in Figure 4.1.3. A portion of the analysis results log file is also shown below as numerical data for the analysis results.
Fig. 4.1.3 : Analysis results of Mises stress
Analysis result log 0.log¶
fstr_setup: OK
#### Result step= 0
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 0.0000E+00 1 0.0000E+00 1
//U2 0.0000E+00 1 0.0000E+00 1
//U3 0.0000E+00 1 0.0000E+00 1
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 0.0000E+00 1 0.0000E+00 1
//U2 0.0000E+00 1 0.0000E+00 1
//U3 0.0000E+00 1 0.0000E+00 1
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 0.0000E+00 1 0.0000E+00 1
//E22 0.0000E+00 1 0.0000E+00 1
//E33 0.0000E+00 1 0.0000E+00 1
//E12 0.0000E+00 1 0.0000E+00 1
//E23 0.0000E+00 1 0.0000E+00 1
//E31 0.0000E+00 1 0.0000E+00 1
//S11 0.0000E+00 1 0.0000E+00 1
//S22 0.0000E+00 1 0.0000E+00 1
//S33 0.0000E+00 1 0.0000E+00 1
//S12 0.0000E+00 1 0.0000E+00 1
//S23 0.0000E+00 1 0.0000E+00 1
//S31 0.0000E+00 1 0.0000E+00 1
//SMS 0.0000E+00 1 0.0000E+00 1
#### Result step= 1
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 3.9115E-02 82452 -7.1083E-04 65233
//U2 7.4504E-05 354 -5.8813E-04 696
//U3 5.9493E-04 84 -5.8751E-03 61080
//E11 1.3777E-03 130 -1.3653E-03 77625
//E22 4.9199E-04 61 -5.4370E-04 102
//E33 6.8634E-04 51036 -6.1176E-04 30070
//E12 7.1556E-04 27808 -6.8093E-04 27863
//E23 5.3666E-04 56 -5.4347E-04 82
//E31 7.2396E-04 36168 -9.6621E-04 130
//S11 3.8626E+02 130 -3.6387E+02 28580
//S22 1.6628E+02 130 -1.5743E+02 28580
//S33 1.6502E+02 30033 -1.5643E+02 28580
//S12 5.7795E+01 27808 -5.4998E+01 27863
//S23 4.3345E+01 56 -4.3896E+01 82
//S31 5.8474E+01 36168 -7.8040E+01 130
//SMS 2.8195E+02 77625 1.2755E-02 75112
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 1.0731E-03 10485 -1.2123E-03 41779
//E22 3.9143E-04 33536 -4.1389E-04 22892
//E33 5.9415E-04 44563 -5.0497E-04 47965
//E12 5.3264E-04 9163 -5.0405E-04 9161
//E23 3.9226E-04 33024 -4.1464E-04 23465
//E31 5.7633E-04 43142 -4.8019E-04 9571
//S11 2.7231E+02 9180 -2.9763E+02 41779
//S22 1.0792E+02 9180 -1.0656E+02 41779
//S33 1.3921E+02 44569 -1.1431E+02 47974
//S12 4.3021E+01 9163 -4.0712E+01 9161
//S23 3.1683E+01 33024 -3.3490E+01 23465
//S31 4.6550E+01 43142 -3.8785E+01 9571
//SMS 2.4057E+02 41779 3.1383E-02 38687
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 3.9115E-02 82452 -7.1083E-04 65233
//U2 7.4504E-05 354 -5.8813E-04 696
//U3 5.9493E-04 84 -5.8751E-03 61080
//E11 1.3777E-03 130 -1.3653E-03 77625
//E22 4.9199E-04 61 -5.4370E-04 102
//E33 6.8634E-04 51036 -6.1176E-04 30070
//E12 7.1556E-04 27808 -6.8093E-04 27863
//E23 5.3666E-04 56 -5.4347E-04 82
//E31 7.2396E-04 36168 -9.6621E-04 130
//S11 3.8626E+02 130 -3.6387E+02 28580
//S22 1.6628E+02 130 -1.5743E+02 28580
//S33 1.6502E+02 30033 -1.5643E+02 28580
//S12 5.7795E+01 27808 -5.4998E+01 27863
//S23 4.3345E+01 56 -4.3896E+01 82
//S31 5.8474E+01 36168 -7.8040E+01 130
//SMS 2.8195E+02 77625 1.2755E-02 75112
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 1.0731E-03 10485 -1.2123E-03 41779
//E22 3.9143E-04 33536 -4.1389E-04 22892
//E33 5.9415E-04 44563 -5.0497E-04 47965
//E12 5.3264E-04 9163 -5.0405E-04 9161
//E23 3.9226E-04 33024 -4.1464E-04 23465
//E31 5.7633E-04 43142 -4.8019E-04 9571
//S11 2.7231E+02 9180 -2.9763E+02 41779
//S22 1.0792E+02 9180 -1.0656E+02 41779
//S33 1.3921E+02 44569 -1.1431E+02 47974
//S12 4.3021E+01 9163 -4.0712E+01 9161
//S23 3.1683E+01 33024 -3.3490E+01 23465
//S31 4.6550E+01 43142 -3.8785E+01 9571
//SMS 2.4057E+02 41779 3.1383E-02 38687