Analisis Kontak (Bagian 1)¶
Analisis ini menggunakan data dalam tutorial/09_contact_hertz.
Model Analisis¶
Ini adalah masalah kontak Hertz. Gambar 4.9.1 menunjukkan geometri yang dianalisis, dan Gambar 4.9.2 menunjukkan data mesh.
| Item | Deskripsi | Catatan | Referensi |
|---|---|---|---|
| Jenis analisis | Analisis statik nonlinier (elastoplastik, kontak) | !SOLUTION,TYPE=NLSTATIC !CONTACT | |
| Jumlah node | 408 | ||
| Jumlah elemen | 168 | ||
| Jenis elemen | Elemen heksahedral orde pertama 8-node | !ELEMENT,TYPE=361 | |
| Nama material | MAT1 | !MATERIAL,NAME=MAT1 | |
| Properti material | ELASTIC | !ELASTIC | |
| Kondisi batas | Kendala, perpindahan yang ditentukan | ||
| Solver linier | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
Gbr. 4.9.1 Geometri model analisis
Gbr. 4.9.2 Data mesh model analisis
Deskripsi Analisis¶
Analisis kontak dilakukan menggunakan metode pengali Lagrange teraugmentasi dengan menerapkan perpindahan yang ditentukan dalam arah tekan pada permukaan atas model seperempat cakram. Data kontrol analisis ditunjukkan di bawah ini.
Data Kontrol Analisis cgs3.cnt¶
# Control File for FISTR
## Analysis Control
!VERSION
3
!SOLUTION, TYPE=NLSTATIC
!WRITE,RESULT
!WRITE,VISUAL
## Solver Control
### Boundary Condition
!BOUNDARY, GRPID=1
ALL, 3, 3, 0.0
BOTTOM, 2, 2, 0.0
CENTER, 1, 1, 0.0
UPPER, 2, 2, -0.306
!CONTACT_ALGO, TYPE=ALAGRANGE
!CONTACT, GRPID=1
CP1, 0.0
### STEP
!STEP, SUBSTEPS=5, CONVERG=1.0e-5
BOUNDARY, 1
CONTACT, 1
### Material
!MATERIAL, NAME=MAT1
!ELASTIC
1100.0, 0.0
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=YES,TIMELOG=YES
1000, 1
1.0e-10, 1.0, 0.0
## Post Control
!VISUAL,method=PSR
!surface_num=1
!surface 1
!output_type=VTK
!END
Prosedur Analisis¶
Jalankan perintah executable FrontISTR fistr1.
(Dijalankan dengan 4 thread)
Hasil Analisis¶
Untuk substep kelima, plot bentuk terdeformasi dengan kontur perpindahan arah y dibuat menggunakan REVOCAP_PrePost dan ditunjukkan pada Gambar 4.9.3. Sebagai hasil analisis numerik, cuplikan file log hasil analisis ditunjukkan di bawah ini.
Gbr. 4.9.3 Hasil analisis: deformasi dan perpindahan arah y
Log Hasil Analisis 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= 5
##### Local Summary @Node :Max/IdMax/Min/IdMin####
//U1 1.3079E-02 31 -4.1442E-02 54
//U2 4.9597E-03 1008 -3.0604E-01 69
//U3 0.0000E+00 1 0.0000E+00 1
//E11 7.1171E-03 1049 -4.7627E-02 1
//E22 2.0644E-03 1012 -5.3428E-02 50
//E33 9.3301E-03 50 -4.0103E-03 54
//E12 4.3231E-02 1000 -2.7666E-02 54
//E23 1.3028E-12 1046 -1.2515E-12 2
//E31 3.5660E-13 48 -2.1028E-12 51
//S11 7.9455E+00 1049 -4.9987E+01 1
//S22 2.2819E+00 1012 -5.3282E+01 50
//S33 1.1359E+01 50 -4.4937E+00 54
//S12 2.0802E+01 1000 -1.4668E+01 54
//S23 6.7682E-10 1046 -6.3666E-10 2
//S31 2.0235E-10 48 -1.1497E-09 51
//SMS 6.0944E+01 1000 1.0198E-01 69
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 4.6311E-03 1024 -3.5443E-02 8
//E22 1.7091E-03 1031 -5.4262E-02 8
//E33 1.5903E-04 7 -1.6631E-05 101
//E12 1.8590E-02 1009 -2.6073E-02 14
//E23 1.5204E-13 1000 -4.1521E-13 16
//E31 1.3902E-13 5 -8.2391E-13 7
//S11 5.2516E+00 1024 -3.8099E+01 8
//S22 1.8872E+00 1031 -5.5262E+01 8
//S33 2.2824E-01 7 -1.8263E-02 101
//S12 9.8516E+00 1009 -1.3352E+01 14
//S23 7.8767E-11 1000 -2.1075E-10 16
//S31 7.7553E-11 5 -4.4780E-10 7
//SMS 4.9470E+01 8 2.4786E-01 1007
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 1.3079E-02 31 -4.1442E-02 54
//U2 4.9597E-03 1008 -3.0604E-01 69
//U3 0.0000E+00 1 0.0000E+00 1
//E11 7.1171E-03 1049 -4.7627E-02 1
//E22 2.0644E-03 1012 -5.3428E-02 50
//E33 9.3301E-03 50 -4.0103E-03 54
//E12 4.3231E-02 1000 -2.7666E-02 54
//E23 1.3028E-12 1046 -1.2515E-12 2
//E31 3.5660E-13 48 -2.1028E-12 51
//S11 7.9455E+00 1049 -4.9987E+01 1
//S22 2.2819E+00 1012 -5.3282E+01 50
//S33 1.1359E+01 50 -4.4937E+00 54
//S12 2.0802E+01 1000 -1.4668E+01 54
//S23 6.7682E-10 1046 -6.3666E-10 2
//S31 2.0235E-10 48 -1.1497E-09 51
//SMS 6.0944E+01 1000 1.0198E-01 69
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 4.6311E-03 1024 -3.5443E-02 8
//E22 1.7091E-03 1031 -5.4262E-02 8
//E33 1.5903E-04 7 -1.6631E-05 101
//E12 1.8590E-02 1009 -2.6073E-02 14
//E23 1.5204E-13 1000 -4.1521E-13 16
//E31 1.3902E-13 5 -8.2391E-13 7
//S11 5.2516E+00 1024 -3.8099E+01 8
//S22 1.8872E+00 1031 -5.5262E+01 8
//S33 2.2824E-01 7 -1.8263E-02 101
//S12 9.8516E+00 1009 -1.3352E+01 14
//S23 7.8767E-11 1000 -2.1075E-10 16
//S31 7.7553E-11 5 -4.4780E-10 7
//SMS 4.9470E+01 8 2.4786E-01 1007