Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 9, Problem 17CQ
To determine
The name of creep for the change in shape due to transfer of atoms through a bulk of material.
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this is about thermal stress
Two triangular wedges are glued together as shown
in the figure. The stress acting normal to the
interface, o, is
MPa.
100 MPa
100 MPa
on
45%
100 MPa
-100 MPa
the cross-sectional area of the bar 1 of the two bars supported on the left and right sides is 1.2 cm^2, the coefficient of thermal expansion is 20.9 10^(-6)/K; The cross-sectional area of bar 2 is 3 cm^2 and its coefficient of thermal expansion is 25.4 10^(-6)/K. Since the modulus of elasticity of the material is 207 GPa, these two bars are heated to 99 °C.a) What will be the change in length (mm) of bar 1?b) What is the stress in bar 1 in MPa?c) What is the stress in bar 2 in MPa?
Chapter 9 Solutions
Materials Science And Engineering Properties
Ch. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - Prob. 6CQCh. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - At temperatures above the equi-cohesive...Ch. 9 - Prob. 15CQCh. 9 - Prob. 16CQCh. 9 - Prob. 17CQCh. 9 - Prob. 18CQCh. 9 - Prob. 19CQCh. 9 - Prob. 20CQCh. 9 - Prob. 21CQCh. 9 - Prob. 22CQCh. 9 - Prob. 23CQCh. 9 - Prob. 24CQCh. 9 - Prob. 25CQCh. 9 - Prob. 26CQCh. 9 - Prob. 27CQCh. 9 - Prob. 28CQCh. 9 - Prob. 29CQCh. 9 - Prob. 30CQCh. 9 - Prob. 31CQCh. 9 - Prob. 32CQCh. 9 - Prob. 33CQCh. 9 - Prob. 34CQCh. 9 - Prob. 35CQCh. 9 - Prob. 1ETSQCh. 9 - Prob. 2ETSQCh. 9 - Prob. 3ETSQCh. 9 - Prob. 4ETSQCh. 9 - Prob. 5ETSQCh. 9 - Prob. 6ETSQCh. 9 - Prob. 7ETSQCh. 9 - Prob. 8ETSQCh. 9 - Prob. 9ETSQCh. 9 - Prob. 10ETSQCh. 9 - Prob. 11ETSQCh. 9 - Prob. 12ETSQCh. 9 - Prob. 9.1PCh. 9 - Prob. 9.2PCh. 9 - Prob. 9.3PCh. 9 - Prob. 9.4PCh. 9 - Prob. 9.5PCh. 9 - Prob. 9.6PCh. 9 - Prob. 9.7PCh. 9 - Prob. 9.8PCh. 9 - Prob. 9.9PCh. 9 - Prob. 9.10PCh. 9 - For silver at a tensile stress of 7 MPa and a...Ch. 9 - For germanium at a tensile stress of 410 MPa and a...Ch. 9 - Prob. 9.13PCh. 9 - Prob. 9.14PCh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16PCh. 9 - Prob. 9.17PCh. 9 - Prob. 9.18PCh. 9 - Prob. 9.19PCh. 9 - Prob. 9.20PCh. 9 - Prob. 9.21PCh. 9 - Prob. 9.22P
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- At temperatures above the equi-cohesive temperature, the creep mechanism of grain boundary ____________ is observed.arrow_forwardan isotropic materials, the relationship between the Young's modulus (E), shear modulus (G) and Poisson's ratio (µ) is given by Forarrow_forwardBriefly explain the (a) how and (b) why the size of elastic deformation changes as the thickness of the specimen increases when a rod-shaped specimen made of the same material is bent.arrow_forward
- 3.What is a dislocation? List five more microscopic defects in bulk materials. Which of the following properties are most sensitive to dislocation structures in materials? a. Young's modulus b. Yield strength c. Conductivity d. Transparencyarrow_forwardDraw a tensile stress-strain curve for a typical semi-crystalline polymer such as LLDPE, and define the three main regions on the curve.arrow_forwardA metal is subjected to a stress alternating at 167 revolutions per minute between 335 MPa and -251.25 MPa. Assuming that f=1.09, and fatigue parameters are C=1.7 x 10-12 and n=2.91, what is the growth rate of a surface crack when it reaches a length 0.16 mm in units of nanometer per secondarrow_forward
- 2) If you have the freedom to change the dimensions of an engineering part what would you do to improve the creep life of that part? (You are NOT allowed to change the material that part is made of) 3) Which of the material conditions given below would give better creep resistance, briefly give a reason: i) A cast material because ii) A forged material because iii) A material with fully annealed equiaxed grain structure because .... 4) Express very briefly why the first region (Primary Creep) in Strain-Time creep diagram can be a design limitation (for what type of applications in general? Please DO NOT write aircraft parts!).:arrow_forwardThe degree to which the theoretical value of stress concentration is actually reached is called asarrow_forwardWhich of the following statements are true of dislocations? Select one or more: O a. Dislocations can move under stress O b. Dislocations can arise due to shear deformation of the lattice O C. Dislocations can be viewed with high powered microscopy and not with the naked eye Od. Dislocations primarily enable high stiffness in metalsarrow_forward
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