Homework8b.fall11 - (iii Identify all two-force members...

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ME 352 - Machine Design I Name of Student__________________________ Fall Semester 2011 Lab Section Number_______________________ Homework No. 8 (30 points). Due at the beginning of lecture on Friday, October 28th. Solve Problem 13.6, page 603. The recommended procedure for performing a static force analysis of this linkage using the Graphical Method is as follows: (i) Draw a scaled figure of the linkage and measure the orientations (i.e., the angles) of links 3, 4, and 5. Then use trigonometry, such as, the law of sines and the law of cosines, to check the accuracy of your measurements. (ii) Draw free body diagrams of each of the moving links.
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Unformatted text preview: (iii) Identify all two-force members, three-force members, and/or four-force members. (iv) Draw all the force polygons. Clearly state the scales that you use for your polygons. (v) Determine all the unknown internal reaction forces. Specify the magnitudes and the directions of these forces. (vi) Determine the magnitude and the direction of the external force P acting on link 6 at point D. (vii) Specify whether the two-force members are in tension or in compression. The assumptions are: (i) gravity acts into the paper (i.e., the negative Z-direction); and (ii) the effects of friction in the mechanism can be neglected....
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