abaqusStruct2inp

Below is a demonstration of the features of the abaqusStruct2inp function

Contents

clear; close all; clc;

Syntax

[T]=abaqusStruct2inp(abaqus_spec,fileName,optionStruct);

Description

This function provides the basis for coding Abaqus .inp input files

See also: abaqusStructTemplate

About Abaqus INP input files

Abaqus input files (.inp) are plain text files.

Coding INP files in MATLAB

Specify file heading Users may provide a heading which can be used to give a description of the input file.

% *Heading
% ** Job name: ABAQUS inp file creation demo
% ** Generated by: GIBBON

abaqus_spec.Heading.COMMENT{1}='Job name: ABAQUS inp file creation demo';
abaqus_spec.Heading.COMMENT{2}='Generated by: GIBBON';

The preprint section

% *Preprint, echo=NO, model=NO, history=NO, contact=NO
abaqus_spec.Preprint.ATTR.echo='NO';
abaqus_spec.Preprint.ATTR.model='NO';
abaqus_spec.Preprint.ATTR.history='NO';
abaqus_spec.Preprint.ATTR.contact='NO';

The part section

V=[ 1 1 1; 1 0 1;  1 1 0; 1 0 0; 0 1 1; 0 0 1; 0 1 0; 0 0 0];

nodeIds=(1:1:size(V,1));
E=[5 6 8 7 1 2 4 3];
elementIds=(1:1:size(E,1));

% Node
abaqus_spec.Part{1}.COMMENT='This section defines the part geometry in terms of nodes and elements';
abaqus_spec.Part{1}.ATTR.name='Cube';
abaqus_spec.Part{1}.Node={nodeIds(:),V};

% Element
abaqus_spec.Part{1}.Element{1}.ATTR.type='C3D8R';
abaqus_spec.Part{1}.Element{1}.VAL={elementIds(:),E};

%Element sets
abaqus_spec.Part{1}.Elset{1}.ATTR.elset='Set-1';
abaqus_spec.Part{1}.Elset{1}.VAL=1;

%Node sets
abaqus_spec.Part{1}.Nset{2}.ATTR.nset='Set-2';
abaqus_spec.Part{1}.Nset{2}.VAL=1:1:size(V,1);

%Node sets using "generate"
abaqus_spec.Part{1}.Nset{1}.ATTR.nset='Set-1';
abaqus_spec.Part{1}.Nset{1}.ATTR.generate='';
abaqus_spec.Part{1}.Nset{1}.VAL=[1 size(V,1) 1];

%Sections
abaqus_spec.Part{1}.Solid_section.ATTR.elset='Set-1';
abaqus_spec.Part{1}.Solid_section.ATTR.material='Elastic';

% abaqus_spec.Part{1}.Shell_section.ATTR.elset='Set-1';
% abaqus_spec.Part{1}.Shell_section.ATTR.material='Material-1';
% % abaqus_spec.Part{1}.Shell_section.VAL=[10 5]; %Use numerical data
% abaqus_spec.Part{1}.Shell_section.VAL='10., 5'; %Use custom text data

The assembly section

abaqus_spec.Assembly.ATTR.name='Assembly-1';

abaqus_spec.Assembly.Instance{1}.ATTR.name='Cube-1';
abaqus_spec.Assembly.Instance{1}.ATTR.part='Cube';

% abaqus_spec.Assembly.Instance{2}.ATTR.name='Clot-1';
% abaqus_spec.Assembly.Instance{2}.ATTR.part='Clot';


abaqus_spec.Assembly.Nset{1}.ATTR.nset='Set-1';
abaqus_spec.Assembly.Nset{1}.ATTR.instance='Cube-1';
abaqus_spec.Assembly.Nset{1}.ATTR.generate='';
abaqus_spec.Assembly.Nset{1}.VAL=[1 4 1];

abaqus_spec.Assembly.Nset{2}.ATTR.nset='Set-3';
abaqus_spec.Assembly.Nset{2}.ATTR.instance='Cube-1';
abaqus_spec.Assembly.Nset{2}.ATTR.generate='';
abaqus_spec.Assembly.Nset{2}.VAL=[5 7 1];

abaqus_spec.Assembly.Nset{3}.ATTR.nset='Set-4';
abaqus_spec.Assembly.Nset{3}.ATTR.instance='Cube-1';
abaqus_spec.Assembly.Nset{3}.ATTR.generate='';
abaqus_spec.Assembly.Nset{3}.VAL=[2 6 2];

abaqus_spec.Assembly.Nset{4}.ATTR.nset='Set-5';
abaqus_spec.Assembly.Nset{4}.ATTR.instance='Cube-1';
abaqus_spec.Assembly.Nset{4}.VAL=[3 4 7];

abaqus_spec.Assembly.Nset{5}.ATTR.nset='origin';
abaqus_spec.Assembly.Nset{5}.ATTR.instance='Cube-1';
abaqus_spec.Assembly.Nset{5}.VAL=8;

abaqus_spec.Assembly.Nset{6}.ATTR.nset='all';
abaqus_spec.Assembly.Nset{6}.ATTR.instance='Cube-1';
% abaqus_spec.Assembly.Nset{6}.ATTR.generate='';
abaqus_spec.Assembly.Nset{6}.VAL=1:size(V,1);

abaqus_spec.Assembly.Surface{1}.ATTR.type='ELEMENT';
abaqus_spec.Assembly.Surface{1}.ATTR.name='innerSurface';
elemSetsInner={[1 2 3 4],[4 5 6 7]};
elemSetSideInner=[1 2];
valCell=cell(numel(elemSetsInner),1);
for qs=1:1:numel(elemSetsInner)
    surfaceElementSetName=['elementSetInnerSurface',num2str(qs)];
    abaqus_spec.Assembly.Elset{qs}.ATTR.elset=surfaceElementSetName;
    abaqus_spec.Assembly.Elset{qs}.ATTR.internal=''; %Remains hidden uppon import
    abaqus_spec.Assembly.Elset{qs}.ATTR.instance='Cube-1';
    abaqus_spec.Assembly.Elset{qs}.VAL=elemSetsInner{qs};

    sidePick=elemSetSideInner(qs);
    valCell{qs}={[surfaceElementSetName,', S',num2str(sidePick)]};
end
abaqus_spec.Assembly.Surface{1}.VAL=valCell;

The material section

% *Material, name=Material-1
% *Hyperelastic, neo hooke
%  0.03,1.

abaqus_spec.Material.ATTR.name='Neo-Hooke';
abaqus_spec.Material.Hyperelastic.VAL=[0.03 1];
abaqus_spec.Material.Hyperelastic.ATTR.neo_hooke='';
abaqus_spec.Material.ATTR.name='Elastic';
abaqus_spec.Material.Elastic=[0.5 0.49];

Orientation

% *Orientation, name=Ori-1, system=RECTANGULAR
% Ori-1-DiscOrient
% 2, 90.
abaqus_spec.Orientation.ATTR.name='Ori-1';
abaqus_spec.Orientation.ATTR.system='RECTANGULAR';
abaqus_spec.Orientation.VAL=['Ori-1-DiscOrient' newline vec2strIntDouble([2 90],'%i')];

Contact pair

%%--> Contact pair
abaqus_spec.contact_pair{1}.ATTR.interaction='user-1';
abaqus_spec.contact_pair{1}.ATTR.type='node to surface';
abaqus_spec.contact_pair{1}.ATTR.adjust='0.0';
abaqus_spec.contact_pair{1}.VAL='AORTA-ASSEMBLY.OUTER, AORTA1-ASSEMBLY.OUTERX';

% surface interaction
abaqus_spec.surface_interaction{1}.ATTR.name='user-1';
abaqus_spec.surface_interaction{1}.ATTR.user='';
abaqus_spec.surface_interaction{1}.ATTR.properties='7';
abaqus_spec.surface_interaction{1}.ATTR.unsymm='';
abaqus_spec.surface_interaction{1}.ATTR.DEPVAR='13';
abaqus_spec.surface_interaction{1}.CSTM=', '; %Line with just comma

%Wrap to max width of 8 entries
t=vec2strIntDouble([0.2, 0.2, 0.05, 0.05,150,1000,0.0],'%6.7e');
t=strwrap(t,8,', ');
abaqus_spec.surface_interaction{1}.VAL=t;

The step section

abaqus_spec.Step.ATTR.name='Step-1';
abaqus_spec.Step.ATTR.nlgeom='YES';
abaqus_spec.Step.Static=[0.1 1 1e-5 0.1];

% Boundary
abaqus_spec.Step.Boundary{1}.VAL={'Set-1',[1 1],0.1};
abaqus_spec.Step.Boundary{2}.VAL={repmat({'origin'},3,1) [1 1; 2 2; 3 3]};
abaqus_spec.Step.Boundary{3}.VAL={'Set-3',[1,1]};
abaqus_spec.Step.Boundary{4}.VAL={'Set-4',[2,2]};
abaqus_spec.Step.Boundary{5}.VAL={'Set-5',[3,3]};

% Loads
% ** LOADS
% **
% ** Name: Load-1   Type: Pressure
% *Dsload
% Surf-1, P, 0.00533
% **
abaqus_spec.Step.Dsload{1}.VAL={'Surf-1','P',0.00533};

%Output
abaqus_spec.Step.Restart.ATTR.write='';
abaqus_spec.Step.Restart.ATTR.frequency=0;

abaqus_spec.Step.Output{1}.ATTR.field='';
abaqus_spec.Step.Output{1}.ATTR.variable='PRESELECT';
abaqus_spec.Step.Output{2}.ATTR.history='';
abaqus_spec.Step.Output{2}.ATTR.variable='PRESELECT';
abaqus_spec.Step.Node_print.ATTR.nset='all';
abaqus_spec.Step.Node_print.ATTR.frequency = 1;
abaqus_spec.Step.Node_print.VAL='COORD';
abaqus_spec.Step.El_print.VAL='S';

% * NODE SET, set=yoursetname, frequency = 1
% U

Creating the INP file

You can use abaqusStruct2inp to write the structure data to a file.

%Create file name for INP file
defaultFolder = fileparts(fileparts(mfilename('fullpath')));
savePath=fullfile(defaultFolder,'data','temp');
fileName=fullfile(savePath,'tempModel.inp');
[~,fileNamePart,~]=fileparts(fileName);
[T]=abaqusStruct2inp(abaqus_spec,fileName);

View the inp file

textView(fileName);
Warning: The JavaFrame figure property will be removed in
a future release. For more information see <a
href="https://www.mathworks.com/products/matlab/app-designer/java-swing-alternatives.html">UI
Alternatives for MATLAB Apps</a> on mathworks.com. 

GIBBON www.gibboncode.org

Kevin Mattheus Moerman, gibbon.toolbox@gmail.com

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License: https://github.com/gibbonCode/GIBBON/blob/master/LICENSE

GIBBON: The Geometry and Image-based Bioengineering add-On. A toolbox for image segmentation, image-based modeling, meshing, and finite element analysis.

Copyright (C) 2006-2020 Kevin Mattheus Moerman

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