Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 8, Problem 41QTP
What would be the tensile strength and the modulus of elasticity of the ceramic in Problem 8.39 for porosities of 25% and 50%, for the four n values given?
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The modulus of elasticity for a ceramic material having 4.1 vol% porosity is 323 GPa.
(a) Calculate the modulus of elasticity (in GPa) for the nonporous material.
E =
i
E =
(b) Calculate the modulus of elasticity (in GPa) for 11.7 vol% porosity.
GPa
i
GPa
The flexural strength and associated volume fraction porosity for two specimens of the same ceramic material are as follows:
Ofs (MPa) P
100
50
i
0.05
(a) Compute the flexural strength for a completely nonporous specimen of this material.
0.20
i
MPa
(b) Compute the flexural strength for a 0.30 volume fraction porosity.
MPa
Figure shows the The influence of volume fraction porosity on the modulus of elasticity for
aluminum oxide. What is the reason for the change of modulus of elasticity with volume fraction
?
Chapter 8 Solutions
Manufacturing Engineering & Technology
Ch. 8 - What is a ceramic?Ch. 8 - List the major differences between the properties...Ch. 8 - List the major types of ceramics that are useful...Ch. 8 - What do the following materials typically consist...Ch. 8 - Prob. 5RQCh. 8 - Prob. 6RQCh. 8 - Prob. 7RQCh. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - Prob. 10RQ
Ch. 8 - Prob. 11RQCh. 8 - Prob. 12RQCh. 8 - Prob. 13RQCh. 8 - Prob. 14RQCh. 8 - Prob. 15RQCh. 8 - Prob. 16RQCh. 8 - Prob. 17RQCh. 8 - Prob. 18RQCh. 8 - Explain why ceramics are weaker in tension than in...Ch. 8 - What are the advantages of cermets? Suggest...Ch. 8 - Explain why the electrical and thermal...Ch. 8 - Prob. 22QLPCh. 8 - Prob. 23QLPCh. 8 - Explain why the mechanical properties of ceramics...Ch. 8 - Explain how ceramics can be made tougher.Ch. 8 - List and describe situations in which static...Ch. 8 - What properties are important in making...Ch. 8 - A large variety of glasses is now available. Why...Ch. 8 - Prob. 29QLPCh. 8 - Prob. 30QLPCh. 8 - Aluminum oxide and PSZ are described as white in...Ch. 8 - Why does the strength of a ceramic part depend on...Ch. 8 - In old castles and churches in Europe, the glass...Ch. 8 - Prob. 34QLPCh. 8 - Prob. 35QLPCh. 8 - Perform an Internet search and determine the...Ch. 8 - Prob. 37QLPCh. 8 - Prob. 38QLPCh. 8 - In a fully dense ceramic, UTSO = 200 MPa and EO =...Ch. 8 - Plot the UTS, E, and k values for ceramics as a...Ch. 8 - What would be the tensile strength and the modulus...Ch. 8 - Prob. 42QTPCh. 8 - Prob. 43QTPCh. 8 - Prob. 44QTPCh. 8 - Prob. 45SDPCh. 8 - Prob. 46SDPCh. 8 - Prob. 47SDPCh. 8 - Prob. 48SDPCh. 8 - Prob. 49SDPCh. 8 - Prob. 50SDPCh. 8 - Conduct a literature search and write a brief...Ch. 8 - Prob. 52SDPCh. 8 - Prob. 53SDPCh. 8 - It has been noted that the strength of brittle...Ch. 8 - Prob. 55SDP
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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
- Question 6 During an extrusion process, a chromium billet at a temperature of 1300°C, need to be extruded from a billet diameter of 13 mm to a final diameter of 0.35 mm. An extrusion die are required to withstand the temperature and forces occurring during the process. 6.1 Which ceramic material will you suggest for this application? Provide reasons for your selection. 6.2 If the ceramic material, selected in Question 6.1 have an UTS. = 915 MPa, porosity of 16 % and n = 4, calculate the tensile strength and elastic modulus of the ceramic at room temperature.arrow_forwardThe maximum principal strain failure criterion is appropriate for ceramic materials". Is this true or false?arrow_forwardWhat class of toughening mechanisms is usually at work in engineered ceramics, and why is this the case?arrow_forward
- Figure shows a device for compacting loose material such as powder. A hydraulic pressure p(t) is suddenly applied a constant valde of 23 N/m, and thus is modeled as a dten forsine ftunstien The musses of the piston, the material to be compacted, and the supporting structure have been Included in the ms m The mass m= 10 kg. ce 80 N.s/m and k= 200 N/m The area or the piston is 0.1 m?. Obtain the theoretical response xltl and also verify the response using Matlab. 5.arrow_forward9.6 Briefly explain (a) why there may be sig nificant scatter in the fracture strength for some given ceramic material, and (b) why fracture strength increases with decreasing Y lo specimen size.arrow_forwardState four (4) factors that can influence the variability in fracture strength of ceramic components.arrow_forward
- Discuss the importance of creep deformation at ambienttemperature for ceramics. How does it compare to metals and polymers?arrow_forwardWhen a failure data set for a ceramic material processed in a certain facility is analyzed, it is found that the characteristic strength is 327 MPa and the Weibull modulus is 8.75. A nominally identical batch of material processed in a different facility is also tested and found to have essentially the same characteristic strength, but the Weibull modulus is 6.25. At what stress level is the probability of failure equal to 50% for each set of material? What initial conclusion might you draw about the quality control procedures at the two facilities?arrow_forwardA hydraulic press for compacting powdered PRACTICE samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm (Fig. 9). The piston of the small cylinder is attached to the midpoint of a lever that is hinged at point C as shown in the figure. The sample, which is placed on the large cylinder, has an area of 4.0 cm?. What is the pressure on the sample if 350 N is applied at the end of the lever? (Giancoli, 2014) F2 350 N Sample- F Hydraulic. fluid 10.0 cm Small cylinder -2.0 cmarrow_forward
- 10.A ceramic ball with a diameter of 5 mm is pressed into a steel ball of 10 mm in diameter under a normal load of 100 N. Calculate: (a) the minimum hardness of the steel ball for the contact to remain fully elastic; and (b) the radius of the contact zone. The given parameters are: E ceramic = 450 GPa, E steel = 200 GPa, v ceramic = 0.3, v steel = 0.3, and H ceramic > H steel. 11 A qulinduion11arrow_forwardComputational analysis has determined that a particular design of glass ceramic component has a maximum allowable tensile stress of 21 MPa Your development team has suggested that a specific grade of Wollastonite with a Youngs Modulus of 99 GPa and a specific surface energy of 0.059 J/m2 may be suitable. What would be the maximum allowable size of any internal pores or defects in the glass ceramic component? (This question has only one correct answer) O a. 8.43 um b. 8.86 mm O c. 8.86 μm O d. 17.72 μm e. 16.86 mm O f. 16.86 μm g. 8.43 mmarrow_forward"The tensile modulus of a given polymer increases as its crystallinity increases" Is this statement True or False? Provide an argument with a simple drawing to support your answer.arrow_forward
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