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Write a report ( 5 or 6 pages).. According to the methodology of Materials Science and Engineering, a tetrahedron showing the relationship between performance, microstructure, chemistry and synthesis and processing of materials, introduce a world-class mechanical product in your country to China.




Write a report ( 5 or 6 pages).. According to the methodology of Materials Science and Engineering, a tetrahedron showing the relationship between performance, microstructure, chemistry and synthesis and processing of materials, introduce a world-class mechanical product in your country to China.


(A) Stress-strain curves of (1) the metal and (2) the fibers, respectively.


(i)


It is required that the composite containing one type of fiber must have an elastic


modulus no less than 200 GPa, and that the fibers carry no more than 75% of the total


load applied along the longitude direction. Suggest the appropriate type of fiber and


calculate the associated volume fraction.

The central deflection of the diaphragm of an elastic type pressure measuring instrument was


found to be 0.25mm of an applied pressure of 106๐‘๐‘Ž. The output displacement of diaphragm


has been fed to a Linear variable differential transducer (LVDT) with a built in amplifier


having a sensitivity of 40V/mm. Finally the output is displayed on an analog voltmeter which


has a radius of scale line as 60mm and has a voltage range from zero to 10 volts in an arc of


1500. Using a well labelled diagram, determine the sensitivity of the given diaphragm gauge


in terms of mm/bar (1 bar=105๐‘๐‘Ž).

The % live bacteria due to sterilization follows an exponential relation such as % live = 30 exp (-0.01 T). T is the temperature in oC. What should be the temperature to achieve just less than 5% live bacteria?


The percentage of microorganisms remaining vs. exposure time to autoclave sterilization process follows % = 70-t*2. The percentage of microorganisms remaining vs. exposure time to dry heat sterilization process follows % = 80-t*5. At what time both the methods are equally efficient?


If the densities are 7.9 and 4.0 gm/cc, what is the average density?


15 mm dia SS (Youngโ€™s modulus = 200 Gpa) rod is coated with HA (Youngโ€™s modulus = 300 Gpa). What should be the coating thickness (in mm) so that the Youngโ€™s modulus of the composite is 209 Gpa (use mixture rule)?

Question 1



The central deflection of the diaphragm of an elastic type pressure measuring instrument was



found to be 0.25mm of an applied pressure of 106๐‘๐‘Ž. The output displacement of diaphragm



has been fed to a Linear variable differential transducer (LVDT) with a built in amplifier



having a sensitivity of 40V/mm. Finally the output is displayed on an analog voltmeter which



has a radius of scale line as 60mm and has a voltage range from zero to 10 volts in an arc of



1500



. Using a well labelled diagram, determine the sensitivity of the given diaphragm gauge



in terms of mm/bar (1 bar=105๐‘๐‘Ž).

the following data were recorded during the tensile test of a 14-mm diameter mild steel rod. the gauge length was 50-mm, at fracture the elongation between the gauge was 4-mm and the minimum diameter was 11.3-mm. plot a convectional stress strain curve for mild steel



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