. The strength of materials; a text-book for engineers and architects. enumbers. In the case of the shaft coupling that we have considered itshould be pointed out that we have made a great assumptionin regarding the bolts as being equally stressed, because if,say, three of them are loose fits and the fourth is a good fit, thefourth one will carry all the load; the same point holds withordinary riveted joints. In practice, however, a number ofbolts are always used and each is always regarded as carrying TORSION AND TWISTING OF SHAFTS 313 its proportion of the load, and the best way to meet thed
. The strength of materials; a text-book for engineers and architects. enumbers. In the case of the shaft coupling that we have considered itshould be pointed out that we have made a great assumptionin regarding the bolts as being equally stressed, because if,say, three of them are loose fits and the fourth is a good fit, thefourth one will carry all the load; the same point holds withordinary riveted joints. In practice, however, a number ofbolts are always used and each is always regarded as carrying TORSION AND TWISTING OF SHAFTS 313 its proportion of the load, and the best way to meet thedifficulty seems to be to have the workmanship as good aspossible. General Case of Torque on Groups of Bolts orRivets.—Suppose that we have any number of bolts or rivetsof different areas and at different radii from the axis o aboutwhich a twisting action may be considered as taking place; inFig. 139 we have shown three such bolts. Then if we imaginea slight rotational movement of one part of the joint orcoupling about the point o relatively to the other it will be.
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