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physical properties

-mechanical -electrical -thermal are all factors of what?

1.elastic deformation 2.square

1 .-Stress is proportional to strain - No permanent deformation 2.what point is that on the graph?

1. toughness Area under the elastic and plastic portions of the S-S curve

1. picture

1.MODULUS OF ELASTICITY 2.Elastic Deformation Stiff or flexible

1.Describes the relative stiffness or rigidity of a material Depends upon the slope of the line pertaining to the ____

1. impact 2. velocity, mass, modulus of elasticity

1.Reaction of a stationary object to a collision with a moving object. 2. factors to consider Permanent deformation is the factor of the modulus of elasticity and the volume of the object. The energy can be stored without permanent deformation.

1.Stiffness and Springiness 2. stiff, springy Springiness = 1/Stiffness

1.Strain that occurs when the material is stressed to its proportional limit 2. left to right

1.plastic behavior 2. DUCTILE 3.BRITTLE 4. resilence (Area under the elastic portion of the S-S curve)

1.When the Proportional (Elastic) Limit is exceeded the material exhibits ___ 2. Materials that exhibit a large amount of plastic behavior are_____ 3.Materials that exhibit little or no plastic behavior are ____ 4.picture

1.Shear 2. With a shear force one body must resist sliding past another

1.____- Result of two sets of forces being directed toward each other 2. look after what

1.force 2. resistance 3. stress

1._____A push or pull that has a magnitude and direction (newtons) 2.When a force acts on a body, a____is developed to this external force 3. is the internal reaction to the external force

Proportional Limit Proportional Limit

A material is considered STRONG when the _____ is high. Greater amount of Stress needed to obtain permanent deformation A material is considered WEAK when the ____ is low. Smaller amount of Stress needed to obtain permanent deformation

flexural strength

A way of measuring all types stress simultaneously

Malleability

Ability of a material to withstand permanent deformation under a compressive load without rupture.

strain(tensile force-elongation, compressive force-shortening)

Deformation/Original Length IS THE CHANGE IN LENGTH OF THE BODY WHEN A STRESS IS APPLIED

Springback (Elastic Recovery)

If the wire is deflected beyond its yield point, it will not return to its original shape, but clinically useful_____ will occur unless the failure point is reached.

ULTIMATE TENSILE STRENGTH

Maximum stress required to fracture a structure

PROPORTIONAL LIMIT (Elastic Limit)

Maximum stress that a material will withstand before permanent deformation

PLASTIC DEFORMATION

Stress - Strain curve is no longer straight The material will not return to its original shape

Formability or Ductility gold > silver>platinum

The ability of a material to withstand permanent deformation under a tensile load without rupture. element ranking

elastic strain, range

The distance that the wire will bend elastically before permanent deformation occurs.

Impact Strength

The energy required to fracture the material under an impact for force

Failure Point

The point at which the material fractures

ELASTICITY

The property of having a constant ratio of Stress to Strain

PERCENTAGE ELONGATION

The sum of the elastic deformation and the plastic deformation The total amount that a material stretches total strain

compression compressive stress

______ - two forces directed toward each other along straight line -load tends to compress y - The internal resistance is ______

tension(elongation)

_______ - Two forces are directed away from each other in a straight line - Load tends to stretch or elongate a body

yield point, yield point

____of a material is defined in engineering and materials science as the stress at which a material begins to deform plastically. Prior to the ___ the material will deform elastically and will return to its original shape when the applied stress is removed.

flexural strength

also known as modulus of rupture, bend strength, or fracture strength,[dubious - discuss] is a material property, defined as the stress in a material just before it yields in a flexure test.[1] The transverse bending test is most frequently employed, in which a specimen having either a circular or rectangular cross-section is bent until fracture or yielding using a three point flexural test technique. The ___ represents the highest stress experienced within the material at its moment of rupture. It is measured in terms of stress.

Force per Unit Area N/m2 (Megapascals MPa)

equation for stress

TOUGHNESS Area under the elastic and plastic portions of the S-S curve

is the ability of a material to absorb energy and plastically deform without fracturing

resilience Area under the elastic portion of the S-S curve

is the ability of a material to absorb energy when it is deformed elastically, and release that energy upon unloading

tension compressive shear

types of stress

1.mastication 2.Ultimate Tensile Strength FATIGUE STRENGTH

• Materials are subjected to cycles of loading and unloading (______) • Small surface 'cracks' grow larger and larger upon cycling, until fracture. • Materials may fail due to fatigue at stresses below the ____ overall is what?