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MPC Equation for Periodic cell in Abaqus  


kmmusi
Posts: 3
(@kmmusi)
New Member
Joined: 8 months ago

Hi all, 

There are topics similar to this but did not show example clearly on how to make an inp file in Abaqus. 

I created simple element as shown. I want to apply *Equation on this element to make it deforms periodically on all edges like the picture from Dr.Jorgen. Could someone show me the .inp file? I really appreciate it in advance.

 

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kmmusi
Posts: 3
(@kmmusi)
New Member
Joined: 8 months ago

I don't know what's wrong when using .inp file below. See result. Please help.

*Heading
*Part, name=Part-1
*End Part
*Assembly, name=Assembly
**
*Instance, name=Part-1-1, part=Part-1
*Node
1, 0., 0.
2, 7.5, 0.
3, 15., 0.
4, 0., 5.
5, 7.5, 5.
6, 15., 5.
7, 0., 10.
8, 7.5, 10.
9, 15., 10.
100, 0.5, 0.5
200, 0.6, 0.6
*Element, type=CPS4R
1, 1, 2, 5, 4
2, 2, 3, 6, 5
3, 4, 5, 8, 7
4, 5, 6, 9, 8
*Nset, nset=Set-1, generate
1, 9, 1
*Elset, elset=Set-1, generate
1, 4, 1
** Section: Section-1
*Solid Section, elset=Set-1, material=Material-1
1.,
*End Instance
**
*Nset, nset=Botnodes, instance=Part-1-1
2
*Nset, nset=Leftnodes, instance=Part-1-1
4
*Nset, nset=Rightnodes, instance=Part-1-1
6
*Nset, nset=Topnodes, instance=Part-1-1
8
*Nset, nset=center, instance=Part-1-1
5
*Nset, nset=leftcorner, instance=Part-1-1
1
*Nset, nset=toprightcorner, instance=Part-1-1
9
****************************************************
*Nset, nset=dummy1, instance=Part-1-1
100,
*Nset, nset=dummy2, instance=Part-1-1
200,
*****************************************************
** Constraint: Constraint-1
*Equation
3
Leftnodes,1,1,Rightnodes,1,-1,dummy1,1,-1
3
Leftnodes,2,1,Rightnodes,2,-1,dummy1,2,-1
3
Topnodes,1,1,Botnodes,1,-1,dummy2,1,-1
3
Topnodes,2,1,Botnodes,2,-1,dummy2,2,-1
***************************************************
*End Assembly
*Material, name=Material-1
*Elastic
2000000., 0.3
**
*Boundary
leftcorner,1,1
leftcorner,2,2
**
*Step, name=Step-1, nlgeom=NO
*Static
0.1, 1., 1e-05, 1.
**
**********************************************
*Boundary
dummy1, 1, 1, 10.0
dummy1, 2, 2, 0.0
dummy2, 1, 1, 0.0
dummy2, 2, 2, 0.0
************************************************
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step

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