Problem 2-21 - Sy 3 517 MPa . 3 0.16 lbf . in 3 . 3 4.34 10...

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MACHINE DESIGN - An 15-1-1 PROBLEM 2-21 _____ Statement: Refer to the tables of material data in Appendix C and determine the strength-to-weight ratios of the following material alloys based on their tensile yield strengths: heat-treated 2024 aluminum, SAE 1040 cold-rolled steel, Ti-75A titanium, type 302 cold-rolled stainless steel. Units: MPa 10 6 Pa . Given: Material Yield Strength Specific Weight Mat 1 "2024 Aluminum, HT" Sy 1 290 MPa . γ 1 0.10 lbf . in 3 . 1 2.71 10 4 . Nm 3 . = Mat 2 "1040 CR Steel" Sy 2 490 MPa . 2 0.28 lbf . in 3 . 2 7.60 10 4 . Nm 3 . = Mat 3 "Ti-75A Titanium"
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Unformatted text preview: Sy 3 517 MPa . 3 0.16 lbf . in 3 . 3 4.34 10 4 . N m 3 . = Mat 4 "Type 302 CR SS" Sy 4 1138 MPa . 4 0.28 lbf . in 3 . 4 7.60 10 4 . N m 3 . = i 1 2 , 4 .. Solution: See Mathcad file P0221. 1. Calculate the strength-to-weight ratio for each material as described in Section 2.1. SWR i Sy i i SWR i 10 4 m . 1.068 0.645 1.190 1.497 = Mat i "2024 Aluminum, HT" "1040 CR Steel" "Ti-75A Titanium" "Type 302 CR SS" = P 0221.mcd...
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This note was uploaded on 04/26/2010 for the course MAE 3242 taught by Professor N/a during the Spring '10 term at University of Texas-Tyler.

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