3D Static Penny Crack
Tutorial for 3D Penny Crack
Creating the Uncracked Domain
1. Open Abaqus/CAE 6.9 or later.
2. Double click on Parts. Enter name as Solid, Modeling Space is 3D, Type is Deformable, Base Feature is Solid and Approximate Size is 5. Click Continue.
3. Use the rectangle tool to draw a square from (-2,-2) to (2,2). Click Done. Enter 4 for the depth. Click Ok.
4. Double click on Materials. Enter name as Aluminum. Click on Mechanical, then Elasticity, then Elastic. Enter Young's modulus as 70 GPa and Poisson's ratio as 0.33. Click on Mechanical, then Damage for Traction Separation laws, then Maxps Damage. Enter a value of 500 MPa. From the Suboptions menu click on Damage Evolution. Enter Displacement at Failure as 1. Click Ok. Click Ok.
5. Double click on Sections. Name as Main. Accept default settings by clicking Continue. Select Aluminum as material and click box by Plane stress/strain thickness. Enter 1 as thickness. Click Ok.
6. Expand Parts then expand Plate. Double click on Section Assignments. Select the domain. Click Done. Accept default settings. Click Ok.
7. Expand Solid. Double click on Mesh. From the top menu select Seed, then Edge By Number. Select the Domain. Click Done. Enter 20 as Number of elements along the edges. Hit Enter. Click Done.
8. From the top menu select Mesh, then Controls. Select Hex, Structured. Click Ok. From the top menu select Mesh, then Part. Click Yes.
9. Expand Assembly. Double click on Instances. Select Plate. Accept default settings by clicking Ok.
Creating the Cracked Domain
1. Double click on Parts. Enter name as Crack, Modeling Space is 3D Planar, Type is Deformable, Base Feature is Shell, Type is Planar and Approximate Size is 5. Click Continue.
2. Draw a circle with center at (0,0) and radius of 5. Click Done.
3. Expand Assembly, then double click on Instances. Select Crack. Accept default settings by clicking Ok.
4. Under the menu to the left of the viewport, click Translate Instance. Select the Crack. Click Done. Initial vector is (0,0,0), second vector is (0,0,2). Click Ok.
5. Expand Assembly, the Instances. Right click on Crack, then Suppress.
6. Double click Set. Name as Domain. Type is Element. Click Continue. Select all elements. Click Done.
7. Expand Assembly, then Instances. Right click on Crack, then Resume. Right click on Solid, then Suppress.
8. Double click on Interactions. Click Cancel. From top menu click Special, then Crack, then Create. Name as Penny, Type is XFEM. Click Continue. Select the previously created set as the Crack Domain. On the menu which appears, Specify the Crack Location by clicking on the planar segment corresponding to the crack. Click Ok.
9. Expand Assembly, then Instances. Right click on Solid, then Resume.
Creating the Boundary Conditions and Loads
1. Double click on Steps. Enter Name as Loading. Accept default setting and click Continue. Accept default settings and click Ok.
2. Double click on Loads. Enter name as TopPressure, Category is Mechanical, Type is Pressure. Click Continue. Select the top face of the domain. Click Done. Enter -1 as Magnitude, other settings are default. Click Ok.
3. Repeat step 2 for the bottom face of the domain, entering the name as BottomPressure.
4. Create three sets of boundary conditions. For an origin at the bottom center of the solid the following points are fixed such that they are not allowed to move in the x-direction: (2,0,4), (-2,0,4), (2,0,0), (-2,0,0), y-direction: (0,2,4), (0,-2,4), (0,2,0), (0,-2,0) and z-direction: (2,2,2), (2,-2,2), (-2,2,2), (-2,-2,0).
5. Expand Field Output Requests, double click on F-Output-1. Expand the Failure/Fracture options and check the box next to PHILSM, Level set value phi. Click Ok. This will allow you to view the level set function defining the crack.
Solving the System of Equations
1. Double click on Jobs. Enter name as Penny. Click Continue. Accept default settings by clicking Ok.
2. Expand Jobs. Right click on Penny and click Submit.
3. Right click on Penny, click Results to view results.