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Designing Petrol Tanker Using Thin Shell Theory

Using your answer to part a, determine a suitable material and its thickness for the cylinder using thin walled cylinder theory to calculate the hoop and longitudinal stresses. Regulators and fittings the pipe systems of the fluid tanker system are to be well-matched with the pipes to which they are linked with reference to their strength. According to the calculations, plastic is the most effective material for providing operation at the utmost working stress the architects of the tanker will experience in service (Nash, 1998, p. 80). Such material is exposed to a hydrostatic test in the company of an inspector at the pursuing value of weight: PH = 1,5P Where PH is equivalent to test pressure (bar) P = design pressure (bar) as definite in P1.2.7. For steel tubes and essential fixtures for temperatures exceeding 300°C, the test pressure is to be calculated through the application of the subsequent formula. Nevertheless, it is not compulsory that it surpasses 2P: T 100 H K K P =1,5P Where K100 is equivalent to acceptable pressure at 100°C KT = tolerable pressure at the plan temperature (Nash, 1998, p. 80). The worth of the trial pressure might be decreased, with the support of the ordering society, to 1,5P so as to evade extreme pressure in a method of curvatures and T-pieces. The suitable material and thickness using the thin walled cylinder theory is determined through yield that occurs when utmost pressure variation, or cut pressure is experienced. This stress arrives at the worth matching the yield in simple tension (Hoefakker, 2001, p. 151). This theory has been discovered to be in excellent accordance with investigational findings for this particular case, and it’s yielding material. The hoop and longitudinal stresses will be determined by the pressure by the steady yield,, that the ductile material endures in tension, and there is no strain toughening. The longitudinal pressure in the pie systems is either zero or lies mathematically amid the hoop and radial pressure. From this situation, the stress will have to pursue the utmost stress variation, which is calculated by the hoop and radial stresses. If the tanker’s container with sealed ends has an external diameter D and a wall thickness t = 0.1D. The hoop and longitudinal stresses engaged in applying thin wall cylinder theory will make up for the determined worth of peripheral pressure and the supreme shear pressure in the container (Tangential stress ± 9.75%: max. shear stress ± 11.1%) (Hoefakker, 2001, p. 151). c. In addition to the stresses caused by the petrol, the vehicle utilizes the tank as a stressed member to provide torsional stiffness to the vehicle. As such the tank carries a torque of 63,000Nm. Using complex stress theory, calculate the maximum principle stress and the plane that this acts on. Confirm that your material and thickness choice for the tank is still suitable. The complex stress assumption reviews majority of the data from this case as Sines. Nevertheless, a slightly varied paradigm in the cylinder of the liquid tanker might experience similar pressure due to its parabolic form and outline (Nash,
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