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3 cards from this section. Quick, good the night before a test.
Define longitudinal stress.
Think about how bending alters the length of the beam.
What is the neutral axis?
Where in a beam would you expect no changes in length?
What is the longitudinal stress in a beam during pure bending?
Think of how bending affects the material around the neutral axis.
True or False: The magnitude of longitudinal stress is highest at the neutral axis.
Consider how forces act differently above and below the neutral axis.
A beam of height 25 cm and width 10 cm has a calculated moment of inertia of 350 cm^4. If a bending moment of 120 Nm is applied, calculate the longitudinal stress at a point 12 cm above the neutral axis.
Identify each part of the formula accurately before plugging in the numbers.
Design a beam that would have a lower maximum stress during bending. What characteristics would you suggest altering?
Think about how geometry affects bending resistance.
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