Composites Flashcards
What is a composite?
a solid that contains two or more distinct constituent materials or phases on a scale larger than the atomic
What are Reuss and Voigt?
they are models that help us understand the youngs modulus of a composite
In general, there are two models, one for axial loading (Voigt model), and one for transverse loading (Reuss model)
What is bone?
A composite of collagen and hydroxyapatite
Why arent metals ideal replacements for bone?
their youngs modulus is too large which can lead to stress shielding and therefore bone resorption
Why aren’t polymers ideal bone replacements?
way too soft won’t hold the stress of the body
What is a fibre composite?
bulk material supported by fibres running through the material, these add strength, think concrete reinforcements
What is a laminate?
layers of two different materials on top of each other
Why haven’t carbon fibre composites become commonly used?
Inflammatory problems
What is HAPEX?
Hydroxyapatite poly-ethylene composite
What is HAPEX used for?
Bone filler in non-load bearing bones
e.g. orbital floor reconstructions, middle ear reconstruction
