Fracture Analysis Of Pressure Vessel Under Dynamic Loading And Thermal Effect

Pressure vessel system has an extremely broad range of application, from simple storagernvessels to complicated reactor pressure vessels. The causes of failure in pressure vesselsrnare mainly related to fracture. To avoid appalling failure, it is important to study theirrnfracture characteristics at the design stage and even during operation for maintenancernprocess. The thesis work has investigated the fracture behavior of pressure vessels underrndynamic loading.rnThe pressure vessel is modeled for longitudinal, circumferential and edge cracks for thinrnand thick walled pressure vessels. The solution to the equation of motion is obtained byrntransient analysis and finite element method employing a twenty-node brick element.rnThe model is developed and analyzed using ANSYS. The study includes dynamicrnfracture analyses for longitudinal, circumferential and edge cracks, to obtain dynamicrnstress intensity factor. Also included are the stress and deflection analysis as timernresponse. The validity of the results obtained from the research is verified by comparingrnwith results obtained for numerical static analysis with analytical solution and previouslyrnpublished by other researchers, and good agreement is obtained.rnKey words:rnPressure Vessel, Crack, Dynamic Loading, Dynamic Fracture Analysis, Thermal Shock,rnStress Wave, Quasi-static Stress Intensity Factor, Dynamic Stress Intensity Factor

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