Answered: 8 B P -L- (a) (b)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

A cantilever beam AB with a circular cross
section and length L = 750 mm supports a load
P = 800 N acting at the free end (see figure). The
beam is made of steel with an allowable bending
stress of 120 MPa.
(a) Determine the required diameter d_min (figure
part a) of the beam, considering the effect of the
beam’s own weight.
(b) Repeat part (a) if the beam is hollow with wall
thickness t =d /8 (figure part b); compare the
cross-sectional areas of the two designs.

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