MTE312 - Week 4 - In-Class Activity

How you feel today? :)

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Which symbol represents the "cross-sectional area"?

Which symbol shows the "Modulus of Elasticity"?

What does the symbol, δ , stand for?

• Normal Stress

• Shear Stress

• Yield Stress

• Deformation

Which one is the definition of the strain?

• The ratio of the increase in length of the body to its original length.

• The pressure caused by a force that is acting over a given area.

Which number shows the "Yield Stress" in Stress-Strain diagram?

• 1

• 2

• 3

• 4

What is the Yield Strength for Aluminium?

• 120 MPA

• 230 MPA

• 200 MPA

• 330 MPA

What is the "Ultimate Tensile Strength" for steel?

• 120 MPa

• 230 MPa

• 350 MPa

• 245 MPa

What does points 1, 2, 3 and 4 represent, respectively?

• Modulus of Elasticity, Yield Strength, Ultimate Strength, Fracture Point

• Young's Modulus, Ultimate Strength, Fracture Point, Necking Point

• Yield Strength, Modulus of Elasticity, Strength at Failure, Tensile Strength

• Necking Slope, Tensile Strength, Yield Strength, Plastic Deformation

An aluminum sample with an area of 2.0 in² has been tensile tested. Calculate the engineering stress for an applied load of 8000 lbs.

• 8000 psi

• 4000 psi

• 400 psi

• 16000 psi