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3 cards from this section. Quick, good the night before a test.
Define stress and give its formula.
Think about the relationship between force and area.
What is the unit of strain?
Recall that strain is a ratio.
What does Hooke's Law state?
Think about elastic deformation!
Is strain a dimensionless quantity?
Consider what it means when you divide two lengths.
A steel wire with a length of 10 m and cross-sectional area of 2 x 10^-6 m² is stretched by a force of 5000 N. Calculate the elongation of the wire if Young's modulus for steel is 2 x 10^11 N/m².
Refer back to the relationship between elongation, force, and modulus.
Considering a stress-strain curve, what would happen to a ductile material at the ultimate tensile strength if the load keeps increasing?
Think about how ductility affects material failure.
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