PROBLEM 1: A rigid block of weight Wis supported by three symmetrically spaced rods as shown in the Figure. Each copper rod has an area of 610 mm^2; E = 120 GPa; length of 160 mm and the allowable stress 30 MPa. The steel rod has an area of 1010 mm^2; E = 200 GPa; length= 320 mm and the allowable stress is 60 MPa. Determine the following: Copper 1 W Steel Copper

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
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Author:Saeed Moaveni
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Chapter10: Force And Force-related Variables In Engineering
Section: Chapter Questions
Problem 29P: A structural member with a rectangular cross section as shown in the accompanying figure is used to...
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PROBLEM 1:
A rigid block of weight Wis supported by three symmetrically spaced rods as shown in the Figure. Each copper rod
has an area of 610 mm^2; E= 120 GPa; length of 160 mm and the allowable stress is 30 MPa. The steel rod has
an area of 1010 mm^2; E = 200 GPa; length= 320 mm and the allowable stress is 60 MPa. Determine the following:
Copper
W
Steel
Copper
1. Largest weight of W (in kN) which can be supported by the system.
2. Actual stress in the copper?
3. Actual stress in the steel?
4. What lengths should the identical copper rods be so that all of the materials will be
stressed simultaneously to its allowable limit?
KN
MPa
MPa
mm
Transcribed Image Text:5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 PROBLEM 1: A rigid block of weight Wis supported by three symmetrically spaced rods as shown in the Figure. Each copper rod has an area of 610 mm^2; E= 120 GPa; length of 160 mm and the allowable stress is 30 MPa. The steel rod has an area of 1010 mm^2; E = 200 GPa; length= 320 mm and the allowable stress is 60 MPa. Determine the following: Copper W Steel Copper 1. Largest weight of W (in kN) which can be supported by the system. 2. Actual stress in the copper? 3. Actual stress in the steel? 4. What lengths should the identical copper rods be so that all of the materials will be stressed simultaneously to its allowable limit? KN MPa MPa mm
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