10.6 Modulus of Elasticity, Modulus of Rigidity, and Bulk Modulus of Compressibility 287
TABLE 10.6 The Strength of Selected Materials
Material Yield Strength (MPa) Ultimate Strength (MPa)
Aluminum alloys 35 –500 100 –550
Brass 70 –550 200 – 620
Bronze 82 – 690 200 – 830
Cast iron (tension) 120 – 290 69 – 480
Cast iron (compression) 340 –1,400
Concrete (compression) 10 –70
Copper alloys 55 –760 230 – 830
Glass 30 –1,000
Plate glass 70
Glass fibers 7,000 – 20,000
Magnesium alloys 80 – 280 140 – 340
Nickel 100 – 620 310 –760
Plastics
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 –1,000 550 –1,200
Machine 340 –700 550 – 860
Spring 400 –1,600 700 –1,900
Stainless 280 –700 400 –1,000
Tool 520 900
Steel wire 280 –1,000 550 –1,400
Structural steel 200 –700 340 – 830
Titanium alloys 760 –1,000 900 –1,200
Tungsten 1,400 – 4,000
Wood (bending)
Douglas fir 30 –50 50 – 80
Oak 40 – 60 50 –100
Southern Pine 40 – 60 50 –100
Wood (compression
parallel to grain)
Douglas fir 30 –50 40 –70
Oak 30 – 40 30 –50
Southern pine 30 –50 40 –70Source:From Gere. Mechanics of Materials, 5E. © 2001 Cengage Learning, a part of Cengage Learning, Inc.
Reproduced by permission. http://www.cengage.com/permissionsOne of the goals of most structural analysis is to check for failure. The prediction of fail-
ure is quite complex in nature; consequently, many investigators have been studying this topic.
In engineering design, to compensate for what we do not know about the exact behavior of
material and /or to account for future loading for which we may have not accounted but to62080_10_ch10_p251-302.qxd 5/22/10 12:32 AM Page 287
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