Views
1 month ago

# ch01-03 stress &amp; strain &amp; properties

## 03

03 Solutions 46060 5/7/10 8:45 AM Page 29 © 2010 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher. 3–42. The bar DA is rigid and is originally held in the horizontal position when the weight W is supported from C. E If the weight causes B to be displaced downward 0.025 in., determine the strain in wires DE and BC. Also, if the wires 3 ft are made of A-36 steel and have a cross-sectional area of 0.002 in 2 , determine the weight W. 2 ft 3 ft 3 0.025 = 5 d d = 0.0417 in e DE = d L = 0.0417 3(12) = 0.00116 in.>in. s DE = Ee DE = 29(10 3 )(0.00116) = 33.56 ksi Ans. D B C 4 ft W A F DE = s DE A DE = 33.56 (0.002) = 0.0672 kip a+ ©M A = 0; -(0.0672) (5) + 3(W) = 0 W = 0.112 kip = 112 lb Ans. s BC = W = 0.112 = 55.94 ksi A BC 0.002 e BC = s BC E = 55.94 29 (10 3 = 0.00193 in.>in. ) Ans. 3–43. The 8-mm-diameter bolt is made of an aluminum alloy. It fits through a magnesium sleeve that has an inner diameter of 12 mm and an outer diameter of 20 mm. If the original lengths of the bolt and sleeve are 80 mm and 50 mm, respectively, determine the strains in the sleeve and the bolt if the nut on the bolt is tightened so that the tension in the bolt is 8 kN. Assume the material at A is rigid. E al = 70 GPa, E mg = 45 GPa. A 50 mm 30 mm Normal Stress: s b = P A b = 8(10 3 ) p = 159.15 MPa 4 (0.0082 ) s s = P 8(10 3 ) = p A s 4 (0.022 - 0.012 2 = 39.79 MPa ) Normal Strain: Applying Hooke’s Law e b = s b = 159.15(106 ) E al 70(10 9 = 0.00227 mm>mm ) e s = s s = 39.79(106 ) E mg 45(10 9 = 0.000884 mm>mm ) Ans. Ans. 29

day 68 - stress, strain, fracture
Stress-Strain Relationship in Soil
Stress and Strain - Fast Facts
Engineering Properties of Rocks: Behavior in response to stress ...
Strains and stresses in GaN heteroepitaxy â sources and ... - Laytec
01 Hubley Int&ch01:(Q7) - Polity
STRESS
stress
Strained Graphene
STRESS
Stress
Stress
Stress • What is stress?
Property
PROPERTY
Properties
PROPERTY
PROPERTY
holiday stress
STRESS MANAGMENT
Dealing with Stress
Sources of Stress
Predicting the Creep Strain of PVA-ECC at High Stress Levels ...
Algae to Biofuels: From strain isolation to strain engineering - SPG
2010-03-03
When to stress patients When to stress patients with diabetes ...
FROM COMbAT STRESS TO OpERATiONAl STRESS: ThE CF's ...