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Nonlinear Finite Element Procedures II

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Title: PowerPoint Presentation Author: Adel Last modified by: abedi Created Date: 4/16/2003 5:39:47 PM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Title: Nonlinear Finite Element Procedures II


1
(No Transcript)
2
??? ????? ????? ?????? II Nonlinear Finite
Element Procedures II
???? ?????
3
??? ??? ????? ?????? ????? ????? (??? ???)
4
8- ?????? ????? ????? (Constitutive
Relations) 1-8- ?????
?? ??? ???? ????? ????? ?? ????? ????????
?????? ???????? ??? ???? (????????? ?? ? ????? ??
? ???? ??? ????) ?? ?? ?????? ?????? ????? ????.
?? ????? ???? ??? ??????? ???????? ?? ????? ????
??? ?????? ????? ????? ?? ?????. ???? ????
??????? ??? ?? ???? ????? ????? ???? ?? ???? ????
?? ??? ???? ??? ???? (Special Response) ????
?????? ????? ???? ??? ?? ?? ??????? ????? ??????
??????? ???(Appropriate constitutive description).
5
8- ?????? ????? ????? (Constitutive
Relations) 1-8- ?????
- ???? ??? ?? ??????? ????? ????? ?????
???? ?? ??? ????? ?? ?????
?????? ??? ????????? (????? ????????)
(H)
?????? ????? ????? (????? ?????) (C)
???????? ???? ????? ?? ????? ???? ???? ???
???? ???? ???? ???? ?????? ????? ????? ???? ?????
???????? ? ????? ?????? ???. ?? ????? ???? ???
???? ?? ????? ???? TL ???? ????? ????? ????????
?? ???? ?? ???? ?? ??? ?? ???. ?? ????? ?????
???? ??????? ???? ?? ???? ?? ???? ???? ????? ????
??? ???? ????? ???? ??? ???. ?? ??? ????? ?????
?? ????? ???? ???? ??? ???? ?? ??? ?????? ??? ??
????? ???? ???????? TL ???? ??? ???? ?? ?? ?????.
6
8- ?????? ????? ????? (Constitutive
Relations) 1-8- ?????
- ??? ?? ??? ???? ????? ???? ???? ?????? ??
?????? ?? ?????? ?????? ????? ?? ????? ??????
????? ????? ???. ?? ??? ??? ??? ????? ?? ?? ???
?? ??? ?????? ?? ?? ???? ?????? ????? ??????? ??

??? ????? ??????? (Linear Elastic)
???? ????? ????????? ??? ????? ????? ???
???? ? ???? ??? ????
??? ????? ????????????? (Elasto-plastic)
- ???? ????? ?????? ??? ????? ( ?????????
?? ? ????? ??? ????)?
- ???? ????? ????????? ??? ????? ????? ???
???? ? ???? ??? ???? ?? ???? ??? ???????.
???? ??????? ????? ??? ??? ????? ???? ?????
?? ?? ???? ???? ??? ?????? ?? ???? ?? ??? ???????
??? ????? ????? ??? ???. ????? ?? ??? ??? ?????
?? ??? ? ????? ?? ???? ?? ??? ??? ????? ??????? ?
????????????? ?????? ??????.
7
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
???) ????? ???? TL - ?? ????? ????
????? ??????? ?? ?? ??? ?????? ?? ???? ?????
???????? ??? ???? ?? ??? ?? ???? ?? ???? ?????
???? ????? ??????? ??? ?? ?? ????? ??? ????
??????? ???? ?? ???? ?? ????? ???? TL? ?? ??? ??
???
? ????? ??? ?????? ??? ???
Piola-Kirchhoff ? ???? Green-Lagrange ?? ????? ?
????? ??? ?????? ???? ???????(Constant
Elasticity Tensor) ?????.
?? ?? ??? ????? ????? ??? ?? ???? ?????
???? ??? ?? ????? ??? ?????? ???????
?? ?????? ????? ??? ?? ???? ???? (?????? ???
????? ????? ???-???? ???? ????? ??????????) ?????
???
8
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
- ?? ?????? ??? ????? ?????? ?? ???? ?? ???
???? ??? ????? ???
???) ?? ????? ????????? ??? ?? ????? ?????
????? ?? ???? ?????
???? ??????? ?? ????? ??????? ??? ?? ?? ???? ????
??? ??? ?????? ???????? ??? ? ???? ?? ????????
??? ? ???? ?????? ????? ?? ????. ?) ??
????? ????????? ?? ? ????? ??? ???? ? ???? ???
????? ????? ???? ?? ????? ????? ?????(Natural
Material Description) ?? ????? ?? ????? ????
????? ??? ????????? ??? ??? Piola-Kirchhoff ?
???? Green-Lagrange ?? ??? ????? ??? ??? ????
????? ??? ????. ????????? ???? ?????? ?? ?????
??? ??? ???? ??? ????? ???? ?? ?????? ????? ???
?????? ??? ?????? ?? ?????. ?) ??
????? ?????? ?? ?? ???? ????? ????????? ??? ??
????? ???? ?? ??????? ?? ???????? ??? ? ????
?????? ??? ????? ???? ?? ???? ???????? ?? ?????
????????? ?? ? ????? ??? ????? ??? ???? ??? ????
?? ??? ???? ?? ??? ??? ?? ?? ????? ??? ???
Piola-Kirchhoff ? ????? ???? Green-Lagrange
??????? ???.
??? ???? ????? ??? ??? ???? ?? ??? ?????
Hooke ???? ???? ???? ??? ???? ???? ????? ??? ???
????? ????? ????? ?????? ???? ???? ?? ?? ???? ??
????? ????????? ??? ????? ????? ??? ???? ??? ????
??? ???? ????? ?????. ?? ????? ????? ????? ?????
???????? ????? ???? ??? ???? ???? ? ????? ??.
9
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
?) ????? ???? UL - ?? ????? ???-????
???? ??? ?? ?? ???
???? ??? ?? ??? ?? ?? ????? ???? TL ???? ?????
?????? ?? ??? ?? ???. ??? ??? ?? ???? ?? ??
?????? ?? ?? ????? ???? UL ??? ?? ??????? ?? ????
????? ????? ??????? ??????. ?? ??? ???? ??????
????
???????? ??? ?? ?????? ????? ???? ?? ?????
????
10
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
?? ???? ?? ???? ????? (6.192) ? (6.193) ?
(6.194) ?? ???? ????? ?????? ???? Almansi ?????
????.
11
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
????? ??? ?? ???? ?? ????? ???? UL ?? ?? ??? ???
?? ???? ???? ??? ???? ?? ????????? TL ?? ?? ???
?? ??? ?? ??? ??? ??

12
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
13
8- ?????? ????? ????? (Constitutive
Relations) 2-8- ????? ??????? ?????(Elastic
Material Behaviour) ???? 1- ????????? ??? ????
2- ????? ??? ???? 3- ???? ??? ???? ??????? ???
14
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
  • ???) ?????
  • ?? ???? ?????? ?? ?? ?????? ????? ??????? ? ?????
    ??? ??????? ?????? ?? ??? ??? ??? ?? ?? ??? ??
    ??????? ?? ??? ?? ?? ???? ?? ?????? ?? ?? ????
    ????? ????? ???? ???? ?? ??????
  • ?? ???? ?? ?? ?????? ???? ??? ???????? ?? ??? ??
    ???? t ?? ??????? ??? ? ???? ????? ????.
  • ?? ????? ???? ???? ??? ??????? ?????? ?? ?? ???
    ???????? ? ?? ??? ?? ?? ?? ??? ?????? ?????
    ?????? ??

15
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
1) ????? ????????? ?? ? ????? ??? ???? ?
???? ??? ???? ??? ??????? ?? ????? ?????? ???
????? (Materially nonlinear-only Analysis)
- ?? ??? ???? ?? ?? ????? ???? ?????? ??? ?????
??????? ?? ??? ?? ?? ?? ????????? ?? ? ????? ???
??????? ???? ??? ?? ???? ? ????? ?????? ??? ?????
?? ??? ????? ?? ????. - ?? ?????? ?? ?????
??????? ????? ??? ??? ?? ?? ??? ????? ????
??????? ?? ???? ?? ??? ?? ??????? ??? ???? ??? ??
????? ??? ????? ???.
-
???????? ??? ? ???? ???? ??????? ???????? ??? ?
???? ?????? ?????.
- ?????? ????? ???? ???????
16
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
2) ????? ????????? ?? ? ????? ??? ???? ???
???? ??? ???? ??? ??????? - ?? ??? ????
????? ???? ???????? ??? (TL) ?? ?????? ??????
???? ?? ???. - ?? ??? ????? ????? ?? ???
???? ??? ???? ??? ???????? ??? ????? ???? ???????
???? ????? ?????? ??? ????? ?? ?? ???? ????????
?? ????? ???? TL ???? ????? ????????? ?? ? ?????
??? ???? ?? ???????? ??? ??? ??? Piola-Kirchhoff
? ???? ??? ???? ??? Green-Lagrange ?? ???
???????? ??? ? ???? ?????? ?? ????? ????????? ??
? ????? ??? ???? ???? ???. - ????????
?????? ????? ???? TL ?? ????? ??? ??????? ???
?????? ??????? ?? ????? ???? TL ?? ????? ???????
????????? ?? ? ????? ??? ???? ??? ???? ??? ????
???.
?????? ????? ???? ???????
17
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
3) ????? ????????? ?? ? ????? ??? ???? ?
???? ??? ???? ??? ??????? - ?? ??? ????
????? ???? ???????? ??? (TL) ? ?? ????? ??? (UL)
?? ?? ???? ?? ?????? ?????? ???? ?? ???.
- ??? ????? ???? ??? ????? ????? ?????? ??
?????. ???? ???? ???? ????? ?? ???? ?? ???? ???
???? ????? ???? ??? ???? ???? ??? ???? ?????.
18
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
?? ????? ??? ?? ???? ?? ?????? ????? ?????? ?????
???? ??? ?? ?????? ?? ?? ????? ???? ??? ??? ?????
????? ???? ??? ? ????? ???? ????. ???? ???? ???
?????? ?? ?? ???? ???? ?? ???.
19
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
???) ????? ??? ?? ??? ???
?? ??? ?? ?? ?? ???? ??????? ???? ?? ?????
1) ?????? ???????? ?????? ???? ????
2) ????? ?????? ???? ????? ??????
????? ?????? ??? ?????
????? TL
????? TL
?????? ??? ??? ??? Piola-Kirchhoff
????? ??? ??? ??? Piola-Kirchhoff
????? UL
????? UL
?????? ??? ??? Cauchy
????? ??? ??? Cauchy
20
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
1) ?????? ?????? ??? ???? ???? ???
????? ?????? ??? ?????
????? TL
????? UL
???? ???? ????? ?? ??????? ???? ????? ???
(i-1) ?? ?? ????? ???? ?? ???? ????? ???. ???
??????? ???? ?? ?? ???? ?? ???????? ?????? ?????
??? ?????.
21
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
22
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
  • ?? ????? ???? ?????? ??? ???? ? ????? ????? ???
    ?? ? ?????? ??? ????? ???- ???? ?? ?? ????
    ??????? ???? ????? ????? ?? ????. ?????????
    ??????? ????? ???? ??? ??????? ?? ?????? ?????
    ????.
  • ?? ????? ??? ???????? ?? ?????? ??????? ???? ??
    ???? ????? ?? ???? t ?? ???? t?t ???? ???? ????
    ??? ?? ????? ??????? ??????? ???? ??? ?? ????
    ????. ???? ?? ????? ??????? ?? ????? ???? ????
    ??????? ?? ???.
  • ?? ????? ?????? ??? ?????? ?????? ???-???? ?????
    ?? ????? ??? ????? ?? ???

23
8- ?????? ????? ????? (Constitutive
Relations) 3-8- ????? ?????????? ?????(Inelastic
Material Behaviour) ? ????????????????
?? ???? ?? ???? ????????? ????- ???? ????
??? ??????? ( ?? ??????? ?? TL) ?? ???? ???
???????? ??????? ?? ??? ???? ???? ??? ??? ???
????? ???? ?? ??? ??? ?? ??? ???? ???? ?????
????????? ?? ? ????? ??? ???? ????? ??? ???? ???
??????? ?? ????? ?? ?????.
(Materially-Nonlinear-Only-Analysis)
???? ???? ???? ?? ??? ?? ????? ????? ????
???????? ??? ?? ????? ????????? ?? ? ????? ???
???? ? ???? ??? ???? ??? ??????? ?? ?? ???? ??
??? ???? ????? ???? ?????? ??? ????? ???? ????
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