FEA OF BONES

Question 1

What is the STRUCTURE OF BONE?

Answer 1

Made up of two types of bones
* Cancellous
* Cortical

Question 2

What are the TWO APPROACHES TO STUDYING NON-HO OGENOUS BONES?

Answer 2

• Bone data from CT scan
• Multidimensional Interpolation

Question 3

What is the WORKFLOW FOR A CT BONE STUDY? (3)

Answer 3

1) Build bone geometry from CT data, Create mesh
2) Calculate bone density from CT and convert bone density data into bone material properties
3) Assign bone material properties to elements

Question 4

What are some DRAWBACKS OF CT BONE STUDIES? (3)

Answer 4

1) Noise
2) Limits of the equation for the conversion of CT data to material properties
3) Isotropic modelling of bone

Question 5

What are the THREE INTERPOLATION ALGORITHMS (ANSYS)?

Answer 5

1) RBAS - Radial Basis
2) NNEI - Nearest Neighbour
3) LMUL - Linear Multivariate

Question 6

What is the PROCESS FOR MODELLING A CRACK? (4)

Answer 6

1) Define an initial crack
2) Specify the crack-growth criteria
3) Calculate each crack-growth criterion
4) Perform the crack-growth calculation