In this problem, we will try to show how to analyze the local-global fields in composite structures using SwiftComp-Abaqus-GUI. [[BR]]
The figure below can summarize how to do the local global analysis.[[BR]]
[[Image(Problem-4A.jpg)]][[BR]]
Let the material properties a fiber (T300) property be: : E,,11,,=230 GPA, E,,22,,=15 GPA, v,,12,,=0.20, v23=,,0.0714,,, G,,12,,=15GPa, G,,7,,=3.928GPa.[[BR]]
and matrix (3501-6 epoxy) be: E =4.2GP, ν=0.34[[BR]]
The composite lay-up:
{{{
[0/90/45],,s,,
}}}[[BR]]
Thickness of each ply=0.00025m[[BR]]

“Soden, P. D., Hinton M. J. and Kaddour, A. S., Lamina properties, lay-up configurations and loading conditions for a range of fibre reinforced composite laminates. Compos. Sci. Technol., 1998, 58(7), 1011”[[BR]]

Major steps to perform local-global analysis[[BR]]

'''Step 1: Input material properties'''[[BR]]

There are two materials namely fiber and matrix [[BR]]
a. Fiber properties[[BR]]
b. Matrix properties[[BR]]
[[Image(Problem-4mat.jpg)]][[BR]]
[[Image(Problem-4mat2.jpg)]][[BR]]

'''Step 2: Select appropriate SG''' [[BR]]

a.	Select 3D SG that represent the current example[[BR]]
[[Image(Problem-2c.jpg)]][[BR]]
b.	3D SG wizard shows up[[BR]]
c.	Select spherical inclusion as microstructure[[BR]]
d.	Add inclusion volume fraction[[BR]]
e.	Select material properties for inclusion and matrix[[BR]]
f.	Click on OK to generate the SG[[BR]]
g.	See generated 2D SG[[BR]]
[[Image(Problem-4AA.jpg)]]
[[Image(Problem-4bb.JPG)]][[BR]]
'''Step 3- Homogenization- 3D effective properties''' [[BR]]
a.	Click on Homogenization [[BR]] 
[[Image(problem-1E.JPG)]] [[BR]]
b.	Homogenization wizard shows up ( see below) [[BR]]
c.	Select 3D (solid) Model[[BR]]
d.	Select analysis type, elastic[[BR]]
e.	Click on OK to start homogenization[[BR]]
f.	See the predicted 3D effective properties[[BR]]
[[Image(problem-1H.JPG)]]
[[Image(problem-4I.JPG)]][[BR]]

'''Step 4: Export predicted effective properties to create a new model'''[[BR]]
a.	Export the predicted effective properties [[BR]]
[[Image(Problem-4R.jpg)]][[BR]]
b.	A new model is automatically generated, this is to be used for generating a global model[[BR]]
c.     Predicted effective properties exported as engineering constants [[BR]]
d.	Predicted effective properties exported as stiffness matrix, D, [[BR]]
[[Image(Problem-4M1.jpg)]] [[BR]]
'''Step 5: Generate the global model'''[[BR]]
a.	Click on Part and name as Part-1 [[BR]]
b.	Select 'Shell' from from Shape and 'Planer' from type [[BR]]
c.	A new model is generated as shown ( 0.2m and thickness=0.15m) [[BR]]
[[Image(Problem-4M2.jpg)]] [[BR]]
[[Image(Problem-4M3.jpg)]] [[BR]]
''Step 6: Create and Assign Section'''[[BR]]
a.	Click on Section and name as 'Composite' [[BR]]
b.	Select 'Shell' from from Category and 'Composite' from type [[BR]]
c.	Edit section wizard shows up [[BR]]
d.	Add section properties as shown and click OK [[BR]]
[[Image(Problem-4M4.jpg)]] [[BR]]
[[Image(Problem-4M5.jpg)]] [[BR]]
e.	Assign material orientation [[BR]]
f.	Click on Axis 3 [[BR]]
[[Image(Problem-4M6.jpg)]] [[BR]]
''Step 7: Create Assembly and Steps '''[[BR]]
a.	Select Assembly [[BR]]
b.	Select 'Part-1' from Create Instance [[BR]]
c.	Click  OK [[BR]]
[[Image(Problem-4M7.jpg)]] [[BR]]
e.	Create steps, accept the default setting [[BR]]
[[Image(Problem-4M8.jpg)]] [[BR]]
''Step 8: Create load and boundary conditions '''[[BR]]
a.     Select load from Module [[BR]]
b.	Select load [[BR]]
c.     Name the load as 'Load-1' [[BR]]
d.	Select step 1 [[BR]]
e.	Select pressure [[BR]]
[[Image(Problem-4M9b.jpg)]] [[BR]]
[[Image(Problem-4M9a.jpg)]] [[BR]]
f.	Select the area to be loaded [[BR]]
g.	Add the load [[BR]]
youtube link:[[BR]]
''Step 9: Create boundary conditions '''[[BR]]
a.     Select load from Module [[BR]]
b.	Boundary Conditions (BC) [[BR]]
c.     Name the BC as 'BC-1' and Select 'Step-1'[[BR]]
d.    Select 'Mechanical' from Category and Symmetry type BC[[BR]]
e.    Click on OK [[BR]]
[[Image(Problem-4M10a.jpg)]] [[BR]]
f.    Select the edge for BC [[BR]]
g.    Select ENCASTER [[BR]]
[[Image(Problem-4M10.jpg)]] [[BR]]