The lid on a pressure vessel is held down with 10 bolts that pass through the lid and a flange on the pressure vessel (similar to example 8-4, in the text). The bolts are secured with nuts under the flange. There are no washers. The thickness of the lid is 28 mm and the thickness of the flange is 28 mm. The vessel and lid are both made of steel. The vessel is pressurized to 8 MP a, and the area of the lid exposed to the pressure is 31.4e3 mm². The modulus of elasticity is 207 GPa. The chosen bolts are ISO property class 9.8 and are coarse-pitch series, M12.
Find the external load, P, on each bolted joint.
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