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 49RQ
Is a fatigue S–N curve determined from a single test specimen or a series of identical specimens?
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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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- Q2/ Aluminum tensile specimen with 12.5mm diameter, a gauge length of 50.8mm and the final diameter was 10.5mm. • Plot the engineering stress-strain curve and the true stress- strain curve. Determine proportion limit, young's modulus, the yield point, the ultimate tensile strength, the failure stress on drawing? • Determine Ductility? • Determine Resilience modulus and toughness modulus? 0.006 0.008 0.012 0.017 Strain mm/mm Apparent Stress N/mm 100 0.004 0.22 0.25 0.27 150 200 290 325 480 450 410 True stress N/mm 100.1 150.3 201 326 400 500 550 620arrow_forwardQ7_What is the difference between true strain and engineering strain? What is the relationship that binds them? Q8_ When do the "ears" appear in drawn cup, through cup drawing tests? Q9_Could we use results of tensile tests predict impact failure behavior, why? Q10_Could you estimate ductile-to-brittle transition temperatures for metals having hexagonal close-packed structure, why? Q11_Can creep of metals happen in room temperature, when? Solve a question 7_8_9_10_11arrow_forwardi need the answer quicklyarrow_forward
- Q4: A Company requires a stainless steel that is tough enough for use in the Tropics (50 °C) as well as the Arctic (-50 °C). They peruse the data in Figure 1 below. At the designed use stress, the component can tolerate a surface defect of 0.080 in. at 50 °C. Manufacturing inspection equipment can only detect defects that are larger than 0.050 in. Will a fracture unsaąfe situation arise at -50 °C for the same loading, explain why? 180 180 200 1200 160 160- 160 1000 140 140 120 Yield strength B00 120 3120 100 100 600 80 80 400 60 Fracture toughness 40 200 20 20 Figure 1 01 150 -150 -100 -50 50 100 Testing temperature (°C) Fracture toughness (Hsi-in.12) 60 Fracture toughness (MPa-m) Yield strength (MPa) 우 Yield strength (ksi)arrow_forwardAnalyze and discuss the difference in the obtained tensile properties to microstructure relation between the original and cold-rolled 316L SS samples depicted in Table 3.(Note: You may relate with observed type of phases, phases distribution, size and shapes of grains, and fracture surface morphology).arrow_forward70% + | 8 0 4. An application requires ultimate tensile strength and yield strength of a steel at 110 ksi and 91 ksi, respectively. A data table is attached in the back of the test. Answer the following 4 questions: 4.1. Can SAE 1040 steel be selected for this application? 4.2. If "no" is the answer in Part I, the following Part II, III, and IV can be ignored. If "yes" is the answer in Part I, which condition of SAE 1040 should be selected? 4.3. Why is that steel with the condition in part II selected? 4.4. Is the selected steel brittle or ductile? and Why? Page 4 of 6arrow_forward
- The following data were obtained from the tensile test of Aluminum alloy. The initial diameter of testspecimen was 0.505 inch and gauge length was 2.0 inch. Plot the stress strain diagram and determine(a) Proportional Limit (b) Modulus of Elasticity (c) Yield Stress at 0.2% offset (d) Ultimate Stress and(e) Nominal Rupture Stress.arrow_forwardPls help ASAParrow_forward316 SS underwent fatigue testing to produce the following S-N curve. a.If the material is cyclically loaded at 200 MPa, what is its expected lifebased off the graph below? b. (please see attachment for fatigue constants) If the material is cyclically loaded at 200MPa, based on these material constants what is its expected life?arrow_forward
- Why hardness test needs to perform in engineering practice?arrow_forwardProject 2: Table 3 & 4 shows the fatigue data for two different materials to be used for an automobile rotating parts at an average rotational speed of 750 revolutions per minute: Stress in Mpa 170 148 130 114 92 80 74 Table 3: Summary of fatigue data part 1 Number of cycles 37000 100000 300000 1000000 10000000 100000000 1000000000arrow_forwardSmall and medium industries could not have afforded to buy an expensive universal testing machine to test for the performance of their product under tension loading. Therefore, they have ended buying a cheaper hardness tester for the purpose. Identify the way of how the tensile strength is determined for their product.arrow_forward
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