Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 2, Problem 66RQ
To determine
The basic premise of the fracture
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Give three examples of design features that may lead to a reduction in component fracture strength.
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a.How is a failure defined in fracture mechanics? How is it different from conventional failure theories?
b) Explain the three pure modes of fracture. Describe the most common one, detailing the critical parameter and failure criteria.
Why is the prediction of the tensile fracture of a brittle material is difficult to predict?
Chapter 2 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 2 - Prob. 1RQCh. 2 - Provide two definitions of the termÂ...Ch. 2 - Knowledge of what four aspects and their...Ch. 2 - Give an example of how we might take advantage of...Ch. 2 - What are some of the possible property...Ch. 2 - What are some properties commonly associated with...Ch. 2 - What are some of the more common nonmetallic...Ch. 2 - What are some of the important physical properties...Ch. 2 - Why should caution be exercised when applying the...Ch. 2 - What are the standard units used to report stress...
Ch. 2 - What are static properties?Ch. 2 - What is the most common static test to determine...Ch. 2 - What is engineering stress? Engineering strain?...Ch. 2 - What is Youngs modulus or stiffness, and why might...Ch. 2 - What are some of the tensile test properties that...Ch. 2 - Why is it important to specify the offset when...Ch. 2 - How is the offset yield strength determined?Ch. 2 - During the plastic deformation portion of a...Ch. 2 - What are the test conditions associated with...Ch. 2 - How would the tensile test curves differ for a...Ch. 2 - What are two tensile test properties that can be...Ch. 2 - What is uniform elongation, and when might it be...Ch. 2 - Is a brittle material a weak material? What does...Ch. 2 - What is the toughness of a material, and how might...Ch. 2 - What is the difference between true stress and...Ch. 2 - Explain how the plastic portion of a true...Ch. 2 - What is strain hardening or work hardening? How...Ch. 2 - Give examples of applications utilizing high...Ch. 2 - How might tensile test data be misleading for a...Ch. 2 - What type of tests can be used to determine the...Ch. 2 - What are some of the different material...Ch. 2 - What units could be applied to the Brinell...Ch. 2 - Although the Brinell hardness test is simple and...Ch. 2 - What are the similarities and differences between...Ch. 2 - Why are there different Rockwell hardness scales?Ch. 2 - How might hardness tests be used for quality...Ch. 2 - What are the attractive features of the Vickers...Ch. 2 - When might a microhardness test be preferred over...Ch. 2 - What is the attractive feature of the Knoop...Ch. 2 - Why might the various types of hardness tests fail...Ch. 2 - What is the relationship between penetration...Ch. 2 - Describe several types of dynamic loading.Ch. 2 - Why should the results of standardized dynamic...Ch. 2 - What are the two most common types of bending...Ch. 2 - What aspects or features can significantly alter...Ch. 2 - What is notch�sensitivity, and how might it be...Ch. 2 - Which type of dynamic condition accounts for...Ch. 2 - Are the stresses applied during a fatigue test...Ch. 2 - Is a fatigue S–N curve determined from a...Ch. 2 - What is the endurance limit? What occurs when...Ch. 2 - What features may significantly alter the fatigue...Ch. 2 - What relationship can be used to estimate the...Ch. 2 - Describe the growth of a fatigue crack.Ch. 2 - What material, design, or manufacturing features...Ch. 2 - How might the relative sizes of the fatigue region...Ch. 2 - What are fatigue striations, and why do they form?Ch. 2 - Why is it important for a designer or engineer to...Ch. 2 - What mechanical property changes are typically...Ch. 2 - Prob. 59RQCh. 2 - Prob. 60RQCh. 2 - How might the orientation of a piece of metal...Ch. 2 - How might we evaluate the long�term effect of...Ch. 2 - Prob. 63RQCh. 2 - What is a stress–rupture diagram, and how is one...Ch. 2 - Why are terms such as machinability, formability,...Ch. 2 - Prob. 66RQCh. 2 - What are some of the types of flaws or defects...Ch. 2 - What three principal quantities does fracture...Ch. 2 - What is a dormant flaw? A dynamic flaw? How do...Ch. 2 - How is fracture mechanics applied to fatigue...Ch. 2 - What are the three most common thermal properties...Ch. 2 - Describe an engineering application where the...Ch. 2 - Why is it important that property testing be...Ch. 2 - Why is it important to consider the orientation of...Ch. 2 - Select a product or component for which physical...Ch. 2 - Repeat Problem 1 for a product or component...Ch. 2 - Repeat Problem 1 for a product or component...Ch. 2 - A fuel tanker or railroad tanker car has been...Ch. 2 - One of the important considerations when selecting...Ch. 2 - Several of the property tests described in this...Ch. 2 - Steel and aluminum cans that have been submitted...Ch. 2 - Prob. 2CSCh. 2 - Prob. 3CSCh. 2 - Prob. 4CSCh. 2 - Prob. 5CSCh. 2 - Prob. 6CSCh. 2 - Mixed plastic consisting of recyclable...Ch. 2 - What do you suspect is the cause of these...Ch. 2 - Prob. bCSCh. 2 - Prob. cCS
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What is the cause of the fracture of a brittle material?arrow_forwardFracture Toughness, Corrosion Prevention, and Non-destructive Testing 1. As an Engineer how do you improve the fracture toughness of different metals? 2. How is a nondestructive testing affect in the economic side of industrial and manufacturing plants?arrow_forward2. What do you mean by the fracture mechanics approach to design? Explain in detail and give examples with an outline. Please make it typed, because the written letter interferes with understandingarrow_forward
- Types of fracture in metals and S-N curvearrow_forwardUnder what conditions may a ductile material undergo a brittle fracture?arrow_forwardWhat are the reasons ductile mode of fracture is preferred over brittle mode? Pick as many answers as you can a) More strain energy is required to induce brittle fracture b) Crack propagation is rapid in brittle materials c) ductile materials are tougher d) plastic deformation in ductile fracture gives warning that failure is imminent e) none of the abovearrow_forward
- Why the relative permeability curves are diagonal in naturally fractured reservoirs? a) Because of two different media b) Due to high intrinsic fracture permeability c) Due to significant effect of gravity force in fracture network d) Due to high velocity of fluid in fracture networkarrow_forwardEstimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.20 mm and that has a tip radius of curvature of 0.001 mm when a stress of 1450 MPa is applied. The question is attached. The answer is not 29000. WileyPlus marks it as incorrect.arrow_forwardHow to experimentaly determine Fracture toughness K1c?arrow_forward
- Are fatigue striations always visible on a fatigue fracture surface? If not, under what conditions are they likely to be present and under what conditions are they likely to be absent?arrow_forwardAn Al2O3 specimen is being pulled in tension. The specimen contains flaws having a size of 100 µm. (a) If the surface energy of Al2O3 is 0.8 J/m2, what is the fracture stress? Use the Griffith criterion. E = 380 GPa. (b) Using your vast fracture mechanics knowledge and advanced equations, estimate the fracture stress if the fracture toughness is 4 MPa m1/2. Assume two positions for flaw: in the center of an infinite body and at the edge.arrow_forwardThe mean fracture strength of a batch of alumina components is measured to be 400 MPa. What size of defects would you expect to find in the material? (Take the fracture toughness of alumina to be 4 MPam½ and Y to be 1.8).arrow_forward
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