02-05ChapGere.0008

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Problem 2.7-6 The truss ABC shown in the figure is subjected to a horizontal load P at joint B . The two bars are identical with cross- sectional area A and modulus of elasticity E . (a) Determine the strain energy U of the truss if the angle b 5 60°. (b) Determine the horizontal displacement d B of joint B by equating the strain energy of the truss to the work done by the load. Solution 2.7-6 Truss subjected to a load P SECTION 2.7 Strain Energy 141 bb P B C A L b 5 60 8 L AB 5 L BC 5 L cos b 5 1/2 F REE - BODY DIAGRAM OF JOINT B © F vert 5 0 1 2 2 F AB sin b 1 F BC sin b 5 0 F AB 5 F BC (Eq. 1) © F horiz 5 0 1 2 2 F AB
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This note was uploaded on 09/20/2009 for the course COE 3001 taught by Professor Armanios during the Spring '08 term at Georgia Tech.

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