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ΤΑBLE 17.3 Densities of Selected Materials Material Mass Density (kg/m³) Specific Weight (kN/m³) Aluminum alloys 2600-2800 25.5-27.5 Brass 8400-8600 82.4-84.4 Bronze 8200-8800 80.4-86.3 Cast iron 7000-7400 68.7-72.5 Concrete Plain 2300 22.5 Reinforced 2400 23.5 Lightweight 1100–1800 10.8-17.7 Сopper 8900 87.3 Glass 2400-2800 23.5-27.5 Magnesium alloys Nickel 1760-1830 17.3-18.0 8800 86.3 Plastics Nylon 880-1100 8.6–10.8 Polyethylene 960-1400 9.4-13.7 Rock Granite, marble, quartz 2600-2900 25.5-28.4 Limestone, sandstone 2000-2900 19.6-28.4 Rubber 960-1300 9.4-12.7 Steel 7850 77.0 Titanium alloys 4500 44.1 lungsten 1900 18.6 Wood (air dry) Douglas fir 480-560 4.7-5.5 Oak 640-720 6.3-7.1 Southern pine 560-640 5.5-6.3 Based on Gere, Mechanics of Materials, SE. 2001, Cengage Learning. TABLE 17.4 The Strength of Selected Materials Material Yield Strength (MPa) Ultimate Strength (MPa) Aluminum alloys Brass 35-500 100-550 70-550 200-620 Bronze 82-690 200-830 Cast iron (tension) Cast iron (compression) Concrete (compression) Copper alloys 120-290 69-480 340-1400 10-70 55-760 230-830 Glass 30-1000 Plate glass 70 Glass fibers 7000-20,000 Magnesium alloys Nickel Plastics 80-280 140-340 100-620 310-760 Nylon 40-80 Polyethylene 7-28 Rock (compression) Granite, marble, quartz 50-280 Limestone, sandstone 20-200 Rubber 1-7 7-20 Steel High-strength 340-1000 550–1200 Machine 340-700 550-860 Spring 400-1600 700-1900 Stainless 280-700 400–1000 Тool 520 900 Steel wire 280-1000 550-1400 Structural steel 200-700 340-830 Titanium alloys 760–1000 900-1200 Tungsten 1400-4000 Wood (bending) Douglas fir 30-50 50-80

ΤΑBLE 17.3 Densities of Selected Materials Material Mass Density (kg/m³) Specific Weight (kN/m³) Aluminum alloys 2600-2800 25.5-27.5 Brass 8400-8600 82.4-84.4 Bronze 8200-8800 80.4-86.3 Cast iron 7000-7400 68.7-72.5 Concrete Plain 2300 22.5 Reinforced 2400 23.5 Lightweight 1100–1800 10.8-17.7 Сopper 8900 87.3 Glass 2400-2800 23.5-27.5 Magnesium alloys Nickel 1760-1830 17.3-18.0 8800 86.3 Plastics Nylon 880-1100 8.6–10.8 Polyethylene 960-1400 9.4-13.7 Rock Granite, marble, quartz 2600-2900 25.5-28.4 Limestone, sandstone 2000-2900 19.6-28.4 Rubber 960-1300 9.4-12.7 Steel 7850 77.0 Titanium alloys 4500 44.1 lungsten 1900 18.6 Wood (air dry) Douglas fir 480-560 4.7-5.5 Oak 640-720 6.3-7.1 Southern pine 560-640 5.5-6.3 Based on Gere, Mechanics of Materials, SE. 2001, Cengage Learning. TABLE 17.4 The Strength of Selected Materials Material Yield Strength (MPa) Ultimate Strength (MPa) Aluminum alloys Brass 35-500 100-550 70-550 200-620 Bronze 82-690 200-830 Cast iron (tension) Cast iron (compression) Concrete (compression) Copper alloys 120-290 69-480 340-1400 10-70 55-760 230-830 Glass 30-1000 Plate glass 70 Glass fibers 7000-20,000 Magnesium alloys Nickel Plastics 80-280 140-340 100-620 310-760 Nylon 40-80 Polyethylene 7-28 Rock (compression) Granite, marble, quartz 50-280 Limestone, sandstone 20-200 Rubber 1-7 7-20 Steel High-strength 340-1000 550–1200 Machine 340-700 550-860 Spring 400-1600 700-1900 Stainless 280-700 400–1000 Тool 520 900 Steel wire 280-1000 550-1400 Structural steel 200-700 340-830 Titanium alloys 760–1000 900-1200 Tungsten 1400-4000 Wood (bending) Douglas fir 30-50 50-80

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As we discussed in this chapter, the strength-to-weight ratio of material is an important criterion when selecting material for aerospace applications. Calculate the average strength-toweight ratio for the following materials: aluminum alloy, titanium alloy, and steel. Use Tables 17.3 and 17.4 to look up appropriate values.

ΤΑBLE 17.3 Densities of Selected Materials Material Mass Density (kg/m³) Specific Weight (kN/m³) Aluminum alloys 2600-2800 25.5-27.5 Brass 8400-8600 82.4-84.4 Bronze 8200-8800 80.4-86.3 Cast iron 7000-7400 68.7-72.5 Concrete Plain 2300 22.5 Reinforced 2400 23.5 Lightweight 1100–1800 10.8-17.7 Сopper 8900 87.3 Glass 2400-2800 23.5-27.5 Magnesium alloys Nickel 1760-1830 17.3-18.0 8800 86.3 Plastics Nylon 880-1100 8.6–10.8 Polyethylene 960-1400 9.4-13.7 Rock Granite, marble, quartz 2600-2900 25.5-28.4 Limestone, sandstone 2000-2900 19.6-28.4 Rubber 960-1300 9.4-12.7 Steel 7850 77.0 Titanium alloys 4500 44.1 lungsten 1900 18.6 Wood (air dry) Douglas fir 480-560 4.7-5.5 Oak 640-720 6.3-7.1 Southern pine 560-640 5.5-6.3 Based on Gere, Mechanics of Materials, SE. 2001, Cengage Learning.
Transcribed Image Text:ΤΑBLE 17.3 Densities of Selected Materials Material Mass Density (kg/m³) Specific Weight (kN/m³) Aluminum alloys 2600-2800 25.5-27.5 Brass 8400-8600 82.4-84.4 Bronze 8200-8800 80.4-86.3 Cast iron 7000-7400 68.7-72.5 Concrete Plain 2300 22.5 Reinforced 2400 23.5 Lightweight 1100–1800 10.8-17.7 Сopper 8900 87.3 Glass 2400-2800 23.5-27.5 Magnesium alloys Nickel 1760-1830 17.3-18.0 8800 86.3 Plastics Nylon 880-1100 8.6–10.8 Polyethylene 960-1400 9.4-13.7 Rock Granite, marble, quartz 2600-2900 25.5-28.4 Limestone, sandstone 2000-2900 19.6-28.4 Rubber 960-1300 9.4-12.7 Steel 7850 77.0 Titanium alloys 4500 44.1 lungsten 1900 18.6 Wood (air dry) Douglas fir 480-560 4.7-5.5 Oak 640-720 6.3-7.1 Southern pine 560-640 5.5-6.3 Based on Gere, Mechanics of Materials, SE. 2001, Cengage Learning.
TABLE 17.4 The Strength of Selected Materials Material Yield Strength (MPa) Ultimate Strength (MPa) Aluminum alloys Brass 35-500 100-550 70-550 200-620 Bronze 82-690 200-830 Cast iron (tension) Cast iron (compression) Concrete (compression) Copper alloys 120-290 69-480 340-1400 10-70 55-760 230-830 Glass 30-1000 Plate glass 70 Glass fibers 7000-20,000 Magnesium alloys Nickel Plastics 80-280 140-340 100-620 310-760 Nylon 40-80 Polyethylene 7-28 Rock (compression) Granite, marble, quartz 50-280 Limestone, sandstone 20-200 Rubber 1-7 7-20 Steel High-strength 340-1000 550–1200 Machine 340-700 550-860 Spring 400-1600 700-1900 Stainless 280-700 400–1000 Тool 520 900 Steel wire 280-1000 550-1400 Structural steel 200-700 340-830 Titanium alloys 760–1000 900-1200 Tungsten 1400-4000 Wood (bending) Douglas fir 30-50 50-80
Transcribed Image Text:TABLE 17.4 The Strength of Selected Materials Material Yield Strength (MPa) Ultimate Strength (MPa) Aluminum alloys Brass 35-500 100-550 70-550 200-620 Bronze 82-690 200-830 Cast iron (tension) Cast iron (compression) Concrete (compression) Copper alloys 120-290 69-480 340-1400 10-70 55-760 230-830 Glass 30-1000 Plate glass 70 Glass fibers 7000-20,000 Magnesium alloys Nickel Plastics 80-280 140-340 100-620 310-760 Nylon 40-80 Polyethylene 7-28 Rock (compression) Granite, marble, quartz 50-280 Limestone, sandstone 20-200 Rubber 1-7 7-20 Steel High-strength 340-1000 550–1200 Machine 340-700 550-860 Spring 400-1600 700-1900 Stainless 280-700 400–1000 Тool 520 900 Steel wire 280-1000 550-1400 Structural steel 200-700 340-830 Titanium alloys 760–1000 900-1200 Tungsten 1400-4000 Wood (bending) Douglas fir 30-50 50-80
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