Biomaterials and Materials Science

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Biomaterials and Materials Science
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Calcium Carbonate
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Calcium phosphate Hydroxyapatite
Silica
Calcite
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ELASTIC DEFORMATION
1. Initial
2. Small load
3. Unload
Elastic means reversible!
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PLASTIC DEFORMATION (METALS)
1. Initial
2. Small load
3. Unload
Plastic means permanent!
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Tensile Test the stress strain curve
Stress (s)
F
F
Strain (e)
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LINEAR ELASTIC PROPERTIES
Modulus of Elasticity, E (also known as
Young's modulus)
Hooke's Law
s E e
strain
stress
e DL/Lo
Youngs Modulus
Units E GPa or psi
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TOUGHNESS
Energy to break a unit volume of material
Approximate by the area under the stress-strain
curve.
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Superhydrophobic SurfacesThe Lotus Effect
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Microscopic Surface of Lotus Leaf
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Science of Contact Angle Measurements
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TOUGHNESS
Energy to break a unit volume of material
Approximate by the area under the stress-strain
curve.
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