Material properties
Stress \(\Longleftrightarrow\) Strain
\(E\) – the elastic modulus
- The elastic modulus is the most critical material property
- Strain \(\varepsilon = \frac{\Delta l}{l}\)
- Stress \(\sigma = \frac{P}{A}\)
- Slope – \(E\)
Stress \(\Longleftrightarrow\) Strain
- Moduli for common materials (GPa)
|
Material
|
Modulus
|
|
Stainless Steel
|
200
|
|
Titanium
|
110
|
|
Cortical Bone
|
7-21
|
|
Bone Cement
|
2.5-3.5
|
|
Cancellous Bone
|
0.7-4.9
|
|
UHMW-PE
|
1.4-4.2
|
