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1. Although you have not seen this type of table before, you should be able to work through the answers by reasoning. You have to select one of the materials (A, B or C) to be used as a casing material for a special laptop, which will be used outdoors in military or research applications. These materials have already been assessed as having the graded properties shown in Table 1 below. For this casing material, the importance of the properties (on a scale of 1 = low importance to 10 = high importance) are estimated as: High Elastic Modulus (9) High Corrosion Resistance (7) Low Price (5). The three candidate materials A, B, C were tested against the above properties, and they were given a rating of excellent (4), good (3), fair (2), poor (1). Table 1: Properties of Select Materials Property High Elastic Modulus High Corrosion Resistance Low Price Material A Good (3) Fair (2) Fair (2) Material B Fair (2) Good (3) Good (3) Material C Excellent (4) Poor (1) Fair (2) a) Using Table 1, which material would you choose for this particular application? Carry out a simple calculation to support this choice. b) Name three problems associated with this type of material selection procedure. c) Table 2 shows selected properties of different materials. Which material would be the most appropriate in the following cases: I. The strongest material 11. The lightest material III. The most structurally efficient material IV. The most cost efficient material (something that is structurally the most efficient with respect to cost).

1. Although you have not seen this type of table before, you should be able to work through the answers by reasoning. You have to select one of the materials (A, B or C) to be used as a casing material for a special laptop, which will be used outdoors in military or research applications. These materials have already been assessed as having the graded properties shown in Table 1 below. For this casing material, the importance of the properties (on a scale of 1 = low importance to 10 = high importance) are estimated as: High Elastic Modulus (9) High Corrosion Resistance (7) Low Price (5). The three candidate materials A, B, C were tested against the above properties, and they were given a rating of excellent (4), good (3), fair (2), poor (1). Table 1: Properties of Select Materials Property High Elastic Modulus High Corrosion Resistance Low Price Material A Good (3) Fair (2) Fair (2) Material B Fair (2) Good (3) Good (3) Material C Excellent (4) Poor (1) Fair (2) a) Using Table 1, which material would you choose for this particular application? Carry out a simple calculation to support this choice. b) Name three problems associated with this type of material selection procedure. c) Table 2 shows selected properties of different materials. Which material would be the most appropriate in the following cases: I. The strongest material 11. The lightest material III. The most structurally efficient material IV. The most cost efficient material (something that is structurally the most efficient with respect to cost).

Materials Science And Engineering Properties
Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter8: Engineering Materials
Section: Chapter Questions
Problem 8.5P: The frame of a space shuttle type vehicle must have a high yield strength and high stillness, and...
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Table 2: Selected Materials and their Properties Material Steel Aluminium Alloy Titanium Alloy Magnesium Alloy Cost (£/kg) 1 5 50 10 Density (kg/m³) 8000 3000 5000 2000 Yield Strength (MPa) 400 600 800 200 HINT: The importance of the three properties (a) need to be combined with the ratings. You will need to work out relationships for (c).
Transcribed Image Text:Table 2: Selected Materials and their Properties Material Steel Aluminium Alloy Titanium Alloy Magnesium Alloy Cost (£/kg) 1 5 50 10 Density (kg/m³) 8000 3000 5000 2000 Yield Strength (MPa) 400 600 800 200 HINT: The importance of the three properties (a) need to be combined with the ratings. You will need to work out relationships for (c).
1. Although you have not seen this type of table before, you should be able to work through the answers by reasoning. You have to select one of the materials (A, B or C) to be used as a casing material for a special laptop, which will be used outdoors in military or research applications. These materials have already been assessed as having the graded properties shown in Table 1 below. For this casing material, the importance of the properties (on a scale of 1 = low importance to 10 = high importance) are estimated as: High Elastic Modulus (9) High Corrosion Resistance (7) Low Price (5). The three candidate materials A, B, C were tested against the above properties, and they were given a rating of excellent (4), good (3), fair (2), poor (1). Table 1: Properties of Select Materials Property High Elastic Modulus High Corrosion Resistance Low Price III. IV. Material A Good (3) Fair (2) Fair (2) The strongest material The lightest material Material B Fair (2) Good (3) Good (3) a) Using Table 1, which material would you choose for this particular application? Carry out a simple calculation to support this choice. b) Name three problems associated with this type of material selection procedure. c) Table 2 shows selected properties of different materials. Which material would be the most appropriate in the following cases: 1. II. Material C Excellent (4) Poor (1) Fair (2) The most structurally efficient material The most cost efficient material (something that is structurally the most efficient with respect to cost).
Transcribed Image Text:1. Although you have not seen this type of table before, you should be able to work through the answers by reasoning. You have to select one of the materials (A, B or C) to be used as a casing material for a special laptop, which will be used outdoors in military or research applications. These materials have already been assessed as having the graded properties shown in Table 1 below. For this casing material, the importance of the properties (on a scale of 1 = low importance to 10 = high importance) are estimated as: High Elastic Modulus (9) High Corrosion Resistance (7) Low Price (5). The three candidate materials A, B, C were tested against the above properties, and they were given a rating of excellent (4), good (3), fair (2), poor (1). Table 1: Properties of Select Materials Property High Elastic Modulus High Corrosion Resistance Low Price III. IV. Material A Good (3) Fair (2) Fair (2) The strongest material The lightest material Material B Fair (2) Good (3) Good (3) a) Using Table 1, which material would you choose for this particular application? Carry out a simple calculation to support this choice. b) Name three problems associated with this type of material selection procedure. c) Table 2 shows selected properties of different materials. Which material would be the most appropriate in the following cases: 1. II. Material C Excellent (4) Poor (1) Fair (2) The most structurally efficient material The most cost efficient material (something that is structurally the most efficient with respect to cost).
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