Essentials Of Materials Science And Engineering, Si Edition
Essentials Of Materials Science And Engineering, Si Edition
4th Edition
ISBN: 9781337629157
Author: Donald R. Askeland, Wendelin J. Wright
Publisher: Cengage Learning
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Chapter 6, Problem 6.46P
Interpretation Introduction

Interpretation:

The Flexural strength and Flexural modulus should be calculated for given data of a bar of Al2O3.

Concept introduction:

The ability of any specimen to undergo deformation under the influence of load is known as a Flexural strength.

We can determine the flexural strength with the help of below-mentioned formula:

σBend=3FL2wh2

In the above-mentioned formula,

  • F = the fracture
  • L= the distance between the two points
  • w = width of the specimen
  • h = height of the specimen

The ratio of strength and stress in deformation is known as Flexural Modulus.

We can determine the flexural modulus with the help of below mentioned formula:

Ebend=L3F4 wh3δ

In the above mentioned formula,

  • F = the fracture
  • L= the distance between the two points
  • w = width of the specimen
  • h = height of the specimen
  • δ = the deflection

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5.6 A section of highway has the following flow- density relationship q = 50k - 0.156k2 [with q in veh/h and k in veh/mi]. What is the capacity of the highway section, the speed at capacity, and the density when the highway is at one-quarter of its capacity?
8.20 Two routes connect a suburban area and a city, with route travel times (in minutes) given by the expressions t₁ = 6 + 8(x₁/c₁) and t₂ = 10 + 3(x2/c2), where the x's are expressed in thousands of vehicles per hour and the c's are the route capacities in thousands of vehicles per hour. Initially, the capacities of routes 1 and 2 are 4000 and 2000 veh/h, respectively. A reconstruction project on route 1 reduces the capacity to 3000 veh/h, but total traffic demand is unaffected. Observational studies note a 35.28-second increase in average travel time on route 1 and a 68.5% increase in flow on route 2 after reconstruction begins. User-equilibrium conditions exist before and during reconstruction. If both routes are always used, determine equilibrium flows and travel times before and after reconstruction begins.

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Essentials Of Materials Science And Engineering, Si Edition

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