m11_ps11_fall03 - All of the bars are to be made of tubes...

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Problem M 11 For the truss structure and the loading shown below, you are to calculate the cross-sectional area of the bars to achieve both of the following design objectives: 1) The maximum stress in any of the members is not to exceed 200 MPa 2) The vertical deflection of point D is not to exceed 25 mm Estimate the mass of the resulting structure. Does this seem reasonable?
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Unformatted text preview: All of the bars are to be made of tubes of Aluminum Alloy 7075, Young's modulus 70 GPa, density 2700 kg/m 3 . All tubes will have the same cross-sectional area. List all of the assumptions you are making in your calculation. Suggest a means of reducing the mass of the structure further....
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