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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Textbook Question
Chapter 2, Problem 53RQ
Describe the growth of a fatigue crack.
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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
- Describe the stress-strain behavior?arrow_forwardDiscussion : • Difficulties in testing brittle materials. • Advantages of stress - strain diagram. • Sources of error you expect in the experiment. • Define the term strain hardening and explain in which stage in the stress- strain diagram it occurs, what are its reasons, and its effects on material properties? • Compare between the brittle and ductile fracture. fr in tearrow_forwardComponents that suffered fatigue failure during operation can be identified byseveral characteristic features. In a few words, describe some of these features. Sketch orprovide an image of a component that has failed due to fatigue. Include labels on the imagedenoting the onset of crack propagation and hallmark features of fatigue failure.arrow_forward
- A wing component on an aircraft is fabricated from an aluminum alloy that has a plane strain fracture toughness of 28 . It has been determined that fracture results at a stress of 106 when the maximum internal crack length is 9.2 . For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.6 .arrow_forwardHelp me pleasearrow_forwardDiscussion: • Diffieulties in texting brittle materials • Advantages of stress -strain diagram. • Sources of error you expect in the experiment. • Define the term strain hardening and explain in which stage in the stres strain diagran it occurs, what are its reasons, and its efects on material properties? • Compare between the brittle and ductile fracture.arrow_forward
- Choose two options from those listed below. Compared to brittle materials, ductile materials are characterised by.. Select one or more: O a. fast crack propagation O b. having extensive deformation before failure O c. a smooth fracture surface O d. no visible necking O e. a higher strain energyarrow_forwardList 3 of the design methods that can be applied to avoid the occurrence of fatiguearrow_forwardGive three examples of design features that may lead to a reduction in component fracture strength.arrow_forward
- Figure 5 shows a failure assessment diagram (FAD) from the R6 calculator spreadsheet. (a) Make a copy sketch of the FAD in Figure 5, and indicate the regions of brittle fracture and plastic collapse. (2 mark (b) Using Figure 5, calculate the reserve factor on load. Explain how you obtained your answer. (4 mark. (c) Indicate on your sketch the effect on the FAD if: (i) a residual stress were present in the vicinity of the crack (ii) the crack length were increased (iii) the toughness of the material were improved. (3 + 3 + 3 = 9 marks Plate in tension - through-thickness edge crack 1.2 08- 0 76. 0 81 *06- 20 46. 0 48 04- 02- 0O 02 04 0.6 0.8 10 1.2 1.4 1.6 L, Figure 5 FAD for Question 6arrow_forwardQ1/ Air craft component is fabricated from epoxy composites that have plane strain fracture toughness of (20 MPa m2). It has been determined that fracture results at a stress of (250 MPa) when the maximum (or critical) internal crack length is (3 mm). For the same component and part, will fracture occur at a stress level of (350 MPa) when the maximum internal crack length is (2 mm)? yes or not depending on your solution? Q2/ Polymer (y) has possion ratio (0.33) it faced shearing forces leading to change the shape of the polymer (y) sample. Where the dimensions of sample are (h = 0.8 cm, x = 1 cm) and (Ax = 0.4 cm) and the shear force is 0.25 KN. Calculate the elastic modulus and the bulk modulus?arrow_forwardDescribe how a ductile fracture comes about?arrow_forward
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