Homework8a.spring11

Homework8a.spring11 - (Please check the accuracy of your...

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ME 352 - Machine Design I Name of Student ______________________________ Spring Semester 2011 Lab Section Number ___________________________ Homework No. 8 (30 points). Due at the beginning of lecture on Monday, March 28th. Solve Problem 13.7, on page 603, for the crank position o θ 45 = using the Graphical Method. Assume that gravity is acting into the paper (i.e., the negative Z-direction) and the effects of friction in all of the lower pairs in the mechanism can be neglected. 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.
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Unformatted text preview: (Please check the accuracy of your measurements by using trigonometry, such as, the law of sines and the law of cosines). (ii) Draw free body diagrams of each of the moving links. (iii) Identify all two-force members, three-force members, and/or four-force members. (iv) Draw all the force polygons accurately to scale. 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 direction of the torque 12 12 M (or T ) acting on the crankshaft at 2 . O (vii) Specify whether the two-force members are in tension or in compression....
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