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What are points A, B, C, D on the stress strain
curves?
A: proportional limitB: elastic limitC: ultimate strengthD:
fracture strength
TERM 2
What are y and x axis of stress strain
curve?
DEFINITION 2
x: strainy: stress
TERM 3
elastic modulus =
DEFINITION 3
stress/strain
TERM 4
young's modulus
DEFINITION 4
elastic modulus = stress/strain
TERM 5
What does Elastic modulus
tell?
DEFINITION 5
stiffness
What is yield point?
-the slope of to the proportional limit-take the change in
strain and use the same slope-where the parallel line hits
curve is yield point- the x and y are yield strains
TERM 7
resilience
DEFINITION 7
energy to proportional limitarea under curve up until the
proportional limit
TERM 8
What is resistance resistant to?
DEFINITION 8
permanent deforamtion
TERM 9
Toughness
DEFINITION 9
energy to fracturearea under total curve
TERM 10
What is toughness resistance to?
DEFINITION 10
fracture
How do you tell stiffness?
the slope until the proportional limitsteep slope = stiffless
slope = flexible
TERM 17
How do you see plastic
deformation?
DEFINITION 17
the longness of the curve along the x axislong = ductileShort
= brittle
TERM 18
How do you see strength?
DEFINITION 18
the height along the y graphhigh = stronglow = weak
TERM 19
What are elasticity of teeth materials?
DEFINITION 19
highgold alloyhuman enameldental amalgamdental
dentincompositelow
TERM 20
Strength of common materials (tensile)?
DEFINITION 20
highgold alloyshuman dentincomposites/dental
amalgamporcelainhuman enamellow
Strength of materials (compressive)?
highhuman enameldental amalgamcompositehuman
dentinporcelainlow
TERM 22
fatigue
DEFINITION 22
worn out in strength, endurance, vigor, or freshness
TERM 23
how does fatigue happen?
DEFINITION 23
subjected to cycles of loading and unloading, materials may
fail due to fatigue at stresses below the yield strengtha
progressive fracture under repeated loading
TERM 24
fatigue test
DEFINITION 24
to subject a specimen to alternating stress applications
below the yeild stress until fracture occurs
TERM 25
fatigue strength
DEFINITION 25
the stress at which material fails under repeated loading
