Q4 A beam made of the cross section shown below is made of an elastic- plastic material for which the yield stress is 360 MPa. (a) Find the plastic moment Mp (b) The maximum elastic moment Me (c) Also determine the distribution of the residual stresses in the beam after the plastic moment Mp is applied and then released Assume bending occurs about the x axis

Q4 A beam made of the cross section shown below is made of an elastic- plastic material for which the yield stress is 360 MPa. (a) Find the plastic moment Mp (b) The maximum elastic moment Me (c) Also determine the distribution of the residual stresses in the beam after the plastic moment Mp is applied and then released Assume bending occurs about the x axis

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.3P: Compare the engineering and true secant elastic moduli for the natural rubber in Example Problem 6.2...

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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

Q4
A beam made of the cross section shown below is made of an elastic-
plastic material for which the yield stress is 360 MPa.
(a) Find the plastic moment Mp
(b) The maximum elastic moment Me
(c) Also determine the distribution of the residual stresses in the beam after the plastic
moment Mp is applied and then released
Assume bending occurs about the x axis
40 mm
40 mm
HF
225 mm-
40 mm
Y
+x
200 mm

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