*Materials Quiz Review

A material with a high plastic deformation region on a stress vs. strain curve is classified as...

• brittle

• ductile

• buckling

• strong

• unable to determine

Using the stress-strain curve above, what is the yield strength for aluminum?

• ≈ 130 Mpa

• ≈ 250 Mpa

• ≈ 230 Mpa

• ≈ 200 Mpa

Using the stress-strain curve above, what is the tensile strength for steel?

• ≈ 350 Mpa

• ≈ 250 Mpa

• ≈ 230 Mpa

• ≈ 200 Mpa

Using the data in the extension-load table above, calculate the strain at datum #2008 for a bar of 7.00 mm in width, a thickness of 0.600 mm and a length of 40.0 mm. (Extension is another word for elongation. Also, because your data is in mm and N, your answer will have units of mPa, but that does NOT change your process.)

• 0.02015

• 0.17804

• 0.03023

• 0.06545

Using the data in the extension-load table above, calculate the stress of the rectangular bar of 7.00 mm in width, a thickness of 0.600 mm and a length of 40.0 mm at datum #2010. Extension is another word for elongation. Also, because your data is in mm and N, your answer will have units of mPa, but that does NOT change your process.)

• 1.219 MPa

• 1.625 MPa

• 2.185 MPa

• 0.241 MPa

• 5.233 MPa

What do point A, B, D, E represent, respectively?

• A: Yield Strength, B: Modulus of Elasticity, D: Tensile Strength, E: Strength at Failure

• A: Modulus of Elasticity, B: Yield Strength, D: Tensile Strength, E: Strength at Failure

• A: Modulus of Elasticity, B: Yield Strength , D: Tensile Strength, E: Strength at Failure

• A: Yield Strength, B: Modulus of Elasticity, D: Strength at Failure, E: Tensile Strength

Which of the following are items that do not affect the tensile strength of a member? (Select all that apply.)

• cross-sectional area

• length

• material

• shape

• density

Using the stress-strain curves provided, which of the two materials experiences more plastic deformation?

• Material #1

• Material #2

Using the stress-strain curves provided above, which of the two materials shown is more brittle?

• Material #1

• Material #2

_____ is expressed as the ratio of the applied force divided by the resisting area.

• stress

• strain

• elongation

• tensile strength