MRC Basic Science Flashcards
Hooke’s law.
Stress directly proportional to strain.
Point at which permanent deformation occurs.
Yield point.
If stress is removed then strain decreases to zero.
Elastic deformation.
Stress-strain curve zone to the right of the elastic region.
Plastic region.
If stress is removed then strain is not recovered.
Plastic deformation.
Origin to yield point in stress-strain curve.
Elastic region.
Yield point to ultimate strength point in stress-strain curve.
Plastic region.
Sress-strain curve zone to the right of the plastic region.
Necking region.
Stress-strain curve region from ultimate strength point to failure point of stress-strain curve.
Necking region.
Stiffness of a material is a measure of ____ deformation
elastic
Toughness of material.
Area under stress-strain curve.
Difference between yield point and fracture point characterizes this.
Ductility of material.
Strength of material characterized by this.
Maximum stress before failure.
Constant stress but change in strain over time.
Creep.
Constant strain but change in stress over time.
Stress relaxation.
Loading and unloading of material causes dissipation of energy.
Hysteresis.
Metal is an isotropic or anisotropic material.
Isotropic.
Titanium alloy used.
Titanium, aluminum, vanadium
Ceramic on ceramic hip material.
Alumina.
Ceramic material with poly bearing.
Zirconia.
PMMA stiffness falls here.
Between cortical and cancellous bone.
Dextro (D) lactide monomor with bioabsorbable screws assoicated with this.
Rapid bone resorption and inflammatory response.
Viscoelastic behavior with nonlinear elasticity is evidenced by this.
Toe region.
Responsible for toe region of ligament.
Elastin.
