The wedge blocks are used to hold the specimen in a tension testing machine. Determine the design

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The wedge blocks are used to hold the specimen in a tension testing machine. Determine the design angle θ of the wedges so that the specimen will not slip regardless of the applied load. The coefficients of static friction are μA at A and μB at B. Neglect the weight of the blocks.


Given:

μA = 0.1

μB = 0.6



FB FB NB Ng FA= H NA NA


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