Problem 2.6-18A tension member is to be constructed of two pieces ofplastic glued along plane pq(see figure). For purposes of cutting andgluing, the angle umust be between 25° and 45°. The allowable stresseson the glued joint in tension and shear are 5.0 MPa and 3.0 MPa,respectively.(a) Determine the angle uso that the bar will carry the largest load P.(Assume that the strength of the glued joint controls the design.) (b) Determine the maximum allowable load Pmaxif the cross-sectionalarea of the bar is 225 mm2.Solution 2.6-18Bar in tension with glued joint136CHAPTER 2Axially Loaded MembersqpPPu258,u,458A5225 mm2On glued joint: sallow55.0 MPatallow53.0 MPaALLOWABLE STRESSsxIN TENSION(1)tu52sxsinu cosuSince the direction of tuis immaterial, we can write:|tu|5sxsinu cosuor (2)GRAPH OF
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