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정적 해석(크리프)¶
본 해석에는 tutorial/08_creep_cylinder의 데이터를 사용합니다.
해석 대상¶
해석 대상은 4.3절의 비선형 정적 해석(초탄성 1)과 동일한 원형 봉 1/8 모델입니다.
| 항목 | 내용 | 비고 | 참조 |
|---|---|---|---|
| 해석 종류 | 비선형 정적 해석(탄소성) | !SOLUTION,TYPE=NLSTATIC | |
| 절점 수 | 629 | ||
| 요소 수 | 432 | ||
| 요소 유형 | 8절점 1차 육면체 요소 | !ELEMENT,TYPE=361 | |
| 재료명 | MAT1 | !MATERIAL,NAME=MAT1 | |
| 재료 특성 | ELASTIC,CREEP | !ELASTIC !CREEP,TYPE=NORTON | |
| 경계 조건 | 구속, 강제 변위 | ||
| 행렬 해법 | CG/SSOR | !SOLVER,METHOD=CG,PRECOND=1 |
해석 내용¶
원형 봉에 축 방향 인장 변위를 부여하여 크리프 거동 해석을 수행합니다. 해석 제어 데이터를 아래에 나타냅니다.
해석 제어 데이터 cylinder.cnt¶
# Control File for FISTR
## Analysis Control
!VERSION
3
!SOLUTION, TYPE=NLSTATIC
!WRITE,RESULT
!WRITE,VISUAL
## Solver Control
### Boundary Condition
!BOUNDARY, GRPID=1
LOADS, 3, 3, -7.0
FIX, 3, 3, 0.0
XSYMM, 1, 1, 0.0
YSYMM, 2, 2, 0.0
### STEP
!STEP, SUBSTEPS=5, CONVERG=1.0e-5
BOUNDARY, 1
### Material
!MATERIAL, NAME=MAT1
!ELASTIC
206900.0, 0.29
!CREEP, TYPE=NORTON
1.e-10, 5.0, 0.0
### Solver Setting
!SOLVER,METHOD=CG,PRECOND=1,ITERLOG=YES,TIMELOG=YES
10000, 1
1.0e-8, 1.0, 0.0
## Post Control
!VISUAL,method=PSR
!surface_num=1
!surface 1
!output_type=VTK
!END
해석 절차¶
FrontISTR 실행 명령 fistr1을 실행합니다.
(4개 스레드로 실행)
해석 결과¶
5번째 서브스텝의 해석 결과에 대해, REVOCAP_PrePost로 미제스 응력 등고선을 추가한 변형도를 작성하여 그림 4.8.1에 나타냅니다. 또한 해석 결과의 수치 데이터로서 해석 결과 로그 파일의 일부를 아래에 나타냅니다.
그림 4.8.1 변형 및 미제스 응력 해석 결과
해석 결과 로그 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 0.0000E+00 1 -4.1863E-01 91
//U2 0.0000E+00 1 -4.1863E-01 88
//U3 0.0000E+00 1 -7.0000E+00 38
//E11 -6.5748E-02 38 -6.9459E-02 7
//E22 -6.5748E-02 50 -6.9459E-02 13
//E33 2.3884E-01 13 2.2745E-01 50
//E12 5.5591E-04 53 -5.7135E-04 10
//E23 1.0510E-04 72 -2.0805E-03 84
//E31 1.0510E-04 64 -2.0805E-03 95
//S11 1.1232E+02 14 -1.1026E+02 49
//S22 1.1232E+02 6 -1.1026E+02 39
//S33 4.7484E+04 7 4.5271E+04 50
//S12 4.2781E+01 53 -4.3872E+01 10
//S23 7.8190E+00 72 -1.6257E+02 84
//S31 7.8190E+00 64 -1.6257E+02 95
//SMS 4.7448E+04 7 4.5307E+04 50
##### Local Summary @Element :Max/IdMax/Min/IdMin####
//E11 -6.6010E-02 759 -6.9186E-02 354
//E22 -6.6010E-02 768 -6.9186E-02 363
//E33 2.3840E-01 363 2.2788E-01 768
//E12 4.9263E-04 766 -5.0184E-04 360
//E23 -1.6179E-05 753 -1.9977E-03 498
//E31 -1.6179E-05 749 -1.9977E-03 489
//S11 1.0954E+02 363 -1.0744E+02 768
//S22 1.0954E+02 354 -1.0744E+02 759
//S33 4.7416E+04 354 4.5337E+04 759
//S12 3.7890E+01 766 -3.8501E+01 360
//S23 -1.3249E+00 753 -1.5632E+02 498
//S31 -1.3250E+00 749 -1.5632E+02 489
//SMS 4.7346E+04 363 4.5406E+04 759
##### Global Summary @Node :Max/IdMax/Min/IdMin####
//U1 0.0000E+00 1 -4.1863E-01 91
//U2 0.0000E+00 1 -4.1863E-01 88
//U3 0.0000E+00 1 -7.0000E+00 38
//E11 -6.5748E-02 38 -6.9459E-02 7
//E22 -6.5748E-02 50 -6.9459E-02 13
//E33 2.3884E-01 13 2.2745E-01 50
//E12 5.5591E-04 53 -5.7135E-04 10
//E23 1.0510E-04 72 -2.0805E-03 84
//E31 1.0510E-04 64 -2.0805E-03 95
//S11 1.1232E+02 14 -1.1026E+02 49
//S22 1.1232E+02 6 -1.1026E+02 39
//S33 4.7484E+04 7 4.5271E+04 50
//S12 4.2781E+01 53 -4.3872E+01 10
//S23 7.8190E+00 72 -1.6257E+02 84
//S31 7.8190E+00 64 -1.6257E+02 95
//SMS 4.7448E+04 7 4.5307E+04 50
##### Global Summary @Element :Max/IdMax/Min/IdMin####
//E11 -6.6010E-02 759 -6.9186E-02 354
//E22 -6.6010E-02 768 -6.9186E-02 363
//E33 2.3840E-01 363 2.2788E-01 768
//E12 4.9263E-04 766 -5.0184E-04 360
//E23 -1.6179E-05 753 -1.9977E-03 498
//E31 -1.6179E-05 749 -1.9977E-03 489
//S11 1.0954E+02 363 -1.0744E+02 768
//S22 1.0954E+02 354 -1.0744E+02 759
//S33 4.7416E+04 354 4.5337E+04 759
//S12 3.7890E+01 766 -3.8501E+01 360
//S23 -1.3249E+00 753 -1.5632E+02 498
//S31 -1.3250E+00 749 -1.5632E+02 489
//SMS 4.7346E+04 363 4.5406E+04 759