Understanding Motor Controls
3rd Edition
ISBN: 9781305498129
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 38, Problem 3RQ
Name the four basic sections of a programmable logic controller.
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The principal plane stresses and associated strains in a plane
at a point are σ₁ = 30 ksi, σ₂ = -10 ksi, e₁ = 1.14(10-3),
€2=-0.655(103). Determine the modulus of elasticity and
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10−9. The state of strain at the point has components of ϵx = −100(10−6), ϵy = −200(10−6), and γxy=100(10−6). Use the strain transformation equations to determine (a) the in-plane principal strains and (b) the maximum in-plane shear strain and average normal strain. In each case specify the orientation of the element and show how the strains deform the element within the x−y plane.
The strain gage is placed on the surface of the steel boiler as shown. If it is 0.5 in. long, determine the pressure in the boiler when the gage elongates 0.2(10−3) in. The boiler has a thickness of 0.5 in. and inner diameter of 60 in. Also, determine the maximum x, y in-plane shear strain in the material. Take Est=29(103)ksi, vst=0.3.
Chapter 38 Solutions
Understanding Motor Controls
Ch. 38 - What industry first started using programmable...Ch. 38 - Name two differences between PLCs and common home...Ch. 38 - Name the four basic sections of a programmable...Ch. 38 - Prob. 4RQCh. 38 - What device is used to program a PLC?
Ch. 38 - What device separates the central processing unit...Ch. 38 - What is opto-isolation?
Ch. 38 - Prob. 8RQCh. 38 - Prob. 9RQCh. 38 - Prob. 10RQ
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