Mechanics of Materials

Lesson 03

Properties of Materials

Learning outcomes

This Course:
    1. Describe how the tension test is used to plot the stress-strain curve of a material.
    2. Identify the elastic limit, proportional limit, yield point, and ultimate stress on a stress-strain plot.
    3. Explain the difference between the elastic limit, the proportional limit, and the yield point.
    4. Characterize material behavior by referring to elasticity, inelasticity, plasticity, yielding, strain hardening, permanent deformation (permanent set), and necking.
    5. Compute the modulus of elasticity for a material with a well-defined elastic zone.
    6. Use the 0.2% offset method to determine an approximate yield stress.
    7. Explain the difference between brittleness and ductility by referring to the stress-strain curve.
    8. Explain the advantage of ductility in engineering.
    9. Compare different materials and rank them in terms of strength, stiffness, and ductility.
    10. Contrast behavior when a material is unloaded in the elastic range versus the plastic range.
    11. Recognize that in engineering practice, the proportional limit, elastic limit, and yield stress are close in value are are often lumped together and called the yield point.

In-Class Notes

LE03 Properties of Materials.pdf


HW03 Properties of Materials.pdf