Q4/ A. Explain why ceramic materials do not response to the plastic deformationprocesses? Also clarify why flexural test is applied to ceramics instead of tensile test?B. Estimate whether a cylindrical aluminum oxide sample will fail or not when it subjectto flexural test to achieve flexural strength of 390 MPa knowing that the sample radiusis 2.5 mm, separation distance is 30 mm, and the applied load is 620 N respectively.

Ceramic:- Any of the several tough, fragile, heat- and corrosion-resistant materials created by…

Answered: Q4/ A. Explain why ceramic materials do…

Q4/ A. Explain why ceramic materials do not response to the plastic deformation processes? Also clarify why flexural test is applied to ceramics instead of tensile test?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

In designing a ceramic part for a jet engine, to ensure that the part does not fail, we plan to ensure that the maximum applied stress is only one-third of the yield strength. The yield strength of this CMC part for a jet engine is 520 MPa, and its plane strain fracture toughness is 5.5 MPa√?. We utilize a nondestructive test to find any internal faults that are longer than 1.27 mm. Does our non-destructive test have the requisite sensitivity if Y = 1.4? Explain.
6. A ceramic part for a jet engine has a yield strength of 648 MPa and a plane strain fracture toughness of 8.49 MPam 4. To be sure that the part does not fail, we plan to ensure that the maximum applied stress is only one-third of the yield strength. We use a nondestructive test that will detect any internal flaws greater than 0.27 mm long. Assuming that the Y constant is 1.4, does our nondestructive test have the required sensitivity? Explain.
(a) Borosilicate glass bottles are processed into bottles using press and blow method shown Temperature ("F) in Figure 6(a). By referring to Figure 6(b), 400 800 1200 1600 2000 2400 2800 3200 1018 1016 Borosilicate i. State the suitable temperature range for making glass bottles and justify the glass 96% silica Fused 1016 glass silica 1014 Strain point answer. 1014 1012 Annealing point 1012 1010 H1010 ii. Discuss the process to relieve thermal stresses the glass bottles using Figure 6(b). 10 Softening point 10 106 Working range 105 10 i1i. Briefly discuss the consequence if the process in (ii) is not performed on the glass Working point 10 10 bottles. Melting point 102 Soda-lime glass 200 400 600 800 1000 1200 1400 1600 1800 Temperature ("C) iv. State THREE (3) reasons why glass would be the best material for the glass (a) (b) bottles? Figure 6. (a) Press and blow method and (b) temperature dependence of viscosity for various types of glasses Viscosity (Pa-s) Viscosity (P)
The stress for low alloys steel at which plastic deformationbegins Is 475 MPa, and the modulus or elastlcity ls 315 PA What is the maximum load that may be applied to a specimenwith a eras sectional area of 300 mm2 without plastic deformed If the original specimen length is 120 mm what is the maximumlength to with may be stretched without causing plastic deformation?
For a piece of copper alloy, a standard stress test was applied to it, the following data was collected, from which a stress-strain diagram must be generated, where as data it is known that the initial diameter of the element is 0.505in. The analysis must include the following: 1.Modulus of Elasticity and modulus of resilience. 2.Percentage of elongation. 3.Percentage of area reduction. 4.Real and engineering stress at fracture. It is known that after the specimen fractures, its dimensions in terms of length and diameter are 3.014 and 0.374in, respectively.
information: "When performing a tensile test of a metal, these values were found for stress and strain. the yield strength (YS) is stress at 0.2% plastic strain" The task: A 5 meter long rod of this material is loaded axially with a stress of 244 MPa.i. How long is the rod under load?ii. Then the bar is relieved, how long is it now?
A material has a linear elastic perfectly plastic stress-strain. A cylindrical specimen of that material having an initial length of 35 mm and a tadius of 7 mm is pulled until it elongates 0.8mm. a. Calculate the stain and the corresponding stress at that elongation value. b. Afterward, the specimen is released to zero stress level, how does the final length of the specimen compare with its original length? How much plastic deformation remains if it exists?
(a) A core sample having length to diameter ratio of 2.5 experienced a strain of 0.94 after being stretched. If the core had an initial length of 8 cm and was able to withstand a load of 500 N before breaking, calculate: The resulting length before failure The tensile strength (b) If the core sample above is subjected to a uniaxial compression test resulting in load, axial deformation and circumferential deformation of 350 N, 1.5 and 0.47 respectively at failure, calculate: The uniaxial compressive strength, σc The Young’s modulus, E The Poisson’s ratio,μ
When 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?
(a) Two different materials designated A, and B, are tested in tension using test specimens having diameters of 0.505 cm and gage lengths of 2.0 cm (Figure 1). At failure, the distances between the gauge length marks are 2.13 cm (sample A) and 2.48 cm (sample B). Also, at the failure cross-sections, the diameters are found to be 0.484 cm (sample A) and 0.398 cm (sample B), respectively. i. Calculate the percent elongation and percent of area reduction in each specimen. a. Sample A b. Sample B
The data below are for a thin steel wire suitable for use as a guitar string. Ultimate tensile stress: 1.8 x 109 Pa Young Modulus: 2.2 x 1011 Pa Cross-sectional area: 2.0 x 10-7 m2 In a tensile test, a specimen of the wire, of original length 1.5 m, is stretched until it breaks. Assuming the wire obeys Hooke’s law throughout, calculate the extension of the specimen immediately before breaking.
A ceramic part for a jet engine has a yield strength of 75,000 psi and a plane strain fracture toughness of 5,000 psiVin. To be sure that the part does not fail, we plan to ensure that the maximum applied stress is only one-third of the yield strength. We use a nondestructive test that will detect any internal faws greater than 0.05 in. long. Assuming that f = 1.4, does our nondestructive test have the required sensitivity? Explain. A manufacturine proorssthat unintention