GA Tech, MSE 2001, Lily Turaski, Exam 1 | questions and answers | latest
update
What opportunities have come from the age of materials? 1) New materials
2)Better/more specialized properties
3)Broader design space
What challenges have come from the age of materials? 1) Picking the right material
2)Processing is more difficult
Materials science and engineering studies the inter- Properties, structure, and processing
relationships amongst...
What do engineers do? Design
What do scientists do? Discover
What does materials science provide for other engineers Materials parameters
to use for design?
What is a material property/material constant? An intrinsic property of a material that DOES NOT depend on size or shape
What is a performance parameter? The property of a component that is determined by size, shape, and material
identity
Why is price important? Because it will decide whether a product will be commercially viable or not
What determines the price of a material? Material-driven costs and people-driven costs
What are material-driven costs? 1) Terrestrial abundance
2)Extraction costs
What are people-driven costs? 1) Supply/demand
2) Technology drivers
3)Speculation
4) Geopolitics
Terrestrial abundance is a good... First-order estimate for material cost
What is stiffness? How much force it takes to flex a material
, What is strength? How much force it takes to permanently deform (but not break) the material
What is toughness? How much energy it requires to break the material
Are stress and strain materials properties? Yes
Tensile testing provides data on mechanical properties in Stress-strain curve
the form of the...
What is the linear portion of the stress-strain The elastic region
curve called?
What is the non-linear portion of the stress-strain curve The plastic region
called?
What is elastic deformation? A deformation that is reversible
What is elastic modulus? Also known as stiffness, it is the material's resistance to stretching, bending, or
flexing
What is Poisson's Ratio? The negative of the lateral strain to the axial strain in axial tensile loading
What is plastic deformation? A deformation that is irreversible/permanent
What is yield stress? Also known as strength, it is the stress required to permanently deform
the material. (Stress when we go from linear to non-linear regions of the
curve)
What is ultimate tensile strength? Also known as ultimate strength, it is the stress beyond which the material
fails/fractures. It is represented by the highest point on the curve
What is ductility? The maximum amount of strain (% elongation) at failure. Also known as "strain at
break"
Is resilience a materials property? Yes
What is resilience? The amount of elastic energy returned to your material after stress is released
What is the coefficient of restitution? The performance parameter that corresponds to resilience
Where is resilience on the stress-strain curve? It is the area under the linear portion of the graph
update
What opportunities have come from the age of materials? 1) New materials
2)Better/more specialized properties
3)Broader design space
What challenges have come from the age of materials? 1) Picking the right material
2)Processing is more difficult
Materials science and engineering studies the inter- Properties, structure, and processing
relationships amongst...
What do engineers do? Design
What do scientists do? Discover
What does materials science provide for other engineers Materials parameters
to use for design?
What is a material property/material constant? An intrinsic property of a material that DOES NOT depend on size or shape
What is a performance parameter? The property of a component that is determined by size, shape, and material
identity
Why is price important? Because it will decide whether a product will be commercially viable or not
What determines the price of a material? Material-driven costs and people-driven costs
What are material-driven costs? 1) Terrestrial abundance
2)Extraction costs
What are people-driven costs? 1) Supply/demand
2) Technology drivers
3)Speculation
4) Geopolitics
Terrestrial abundance is a good... First-order estimate for material cost
What is stiffness? How much force it takes to flex a material
, What is strength? How much force it takes to permanently deform (but not break) the material
What is toughness? How much energy it requires to break the material
Are stress and strain materials properties? Yes
Tensile testing provides data on mechanical properties in Stress-strain curve
the form of the...
What is the linear portion of the stress-strain The elastic region
curve called?
What is the non-linear portion of the stress-strain curve The plastic region
called?
What is elastic deformation? A deformation that is reversible
What is elastic modulus? Also known as stiffness, it is the material's resistance to stretching, bending, or
flexing
What is Poisson's Ratio? The negative of the lateral strain to the axial strain in axial tensile loading
What is plastic deformation? A deformation that is irreversible/permanent
What is yield stress? Also known as strength, it is the stress required to permanently deform
the material. (Stress when we go from linear to non-linear regions of the
curve)
What is ultimate tensile strength? Also known as ultimate strength, it is the stress beyond which the material
fails/fractures. It is represented by the highest point on the curve
What is ductility? The maximum amount of strain (% elongation) at failure. Also known as "strain at
break"
Is resilience a materials property? Yes
What is resilience? The amount of elastic energy returned to your material after stress is released
What is the coefficient of restitution? The performance parameter that corresponds to resilience
Where is resilience on the stress-strain curve? It is the area under the linear portion of the graph
