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# 1.7-9 - SEGTiDN 1.7 Allowable Stresses and Allowable Leads...

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Unformatted text preview: SEGTiDN 1.7 Allowable Stresses and Allowable Leads 59 Prﬂblem 1.7-9 A ship’s spar is attached at the base ol‘ a mast by a pin connection Must (see Home). The spar is a steel tube of outer diameter (1’: x 3.5 in. and inner diameter cl. : lb Sin. The steel pin has diameter (1—- l in., and the two plates connecting the spur to the pin have thickness t— — 0.5. 1n. The allowable stresses are as follows: compressive stress in the spar. ll) ltsi; shear stress in the pin. 6.5 ksi; and bearing stress between the pin and the connecting plates 16 ksi . ‘ Kaspar Determine the allowable compressive lorce P4110»; 1n the spat. - \. . Conneeung plate Solution 1.7-9 COMPRESSIVE STRESS IN SPAR . 'JT 1 .. . Pal m 0';qu ‘“ (11:) P111 z 34.636 lttps SHEAR STRESS 11x: PIN Ti‘ { Pug = Tu<2f (11,-) Plate 4 NUMERICAL DATA P“: 2 10.21 hips < controls *-* = 3.5 in._ d z 2.8 in. l Adouble shear dp — l1n t= 0.5111. . 7 BEARING STRESS BETWEEN PIN é: conecrmo PLATES = 10 ksi ril = 6.51mi Uh” = 16 ksi P03 2 01,..(3dpt) 13.,3 = 16 ltips Problem 1.7—10 What is the maximum possible value of the clamping l'oree C in thejuws ol' the pliers shown in the ﬁgure if the ultimate shear stress in the S-nmt diameter pin is 340 MPa'.’ What is the maximum permissible value of the applied load P if a l‘aetor ol' sul'ety 01" 3.0 with respect to l'aiiure ol' the pin is to be maintained? , ...
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