3023 Mechanics of Materials Summer 2013 Exam Il Name: (5 pts) Problem #1: Which

Question

3023 Mechanics of Materials Summer 2013 Exam Il Name: (5 pts) Problem #1: Which of the following is the correct bending stress equation is: M E M a E B) (5 pts) Problem load When a on the free end of a cantilever beam is increased, failure will occur: A) At the free end B) at the fixed end C) in the middle of the beam D) at a distance 2 L3 (5pts) Problem #3: The maximum bending moment for the beam shown in the figure below is: 3 kN/m A) Point A B) Point B D) Middle of the beam 70 kN 70 kN (5pts) Problem #4: subject to stress. The neutral axis of a beam in pure bending is A) Maximum tensile B) Minimum tensile C) Maximum compressive D) None of the above

Explanation / Answer

# 1 A) SInce sigma=My/I

# 2 B) at the fixed end, since maximum bending moment occurs at the fixed end.

# 3 D) in the middle M_max = 285.625

# 4 D) None of the above (stress is zero)

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