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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2322

Title: Fracture Analysis of Pressure Vessel under Dynamic Loading and Thermal Effect
Authors: Mulugeta, Habtemariam
Advisors: Dr. Alem Bazezew
Keywords: Dynamic Stress Intensity Factor
Quasi-static Stress Intensity Factor
Stress Wave
Thermal Shock
Dynamic Fracture Analysis
Dynamic Loading
Crack
Pressure Vessel
Copyright: 24-Jan-2009
Date Added: 3-May-2012
Publisher: AAU
Abstract: Pressure vessel system has an extremely broad range of application, from simple storage vessels to complicated reactor pressure vessels. The causes of failure in pressure vessels are mainly related to fracture. To avoid appalling failure, it is important to study their fracture characteristics at the design stage and even during operation for maintenance process. The thesis work has investigated the fracture behavior of pressure vessels under dynamic loading. The pressure vessel is modeled for longitudinal, circumferential and edge cracks for thin and thick walled pressure vessels. The solution to the equation of motion is obtained by transient analysis and finite element method employing a twenty-node brick element. The model is developed and analyzed using ANSYS. The study includes dynamic fracture analyses for longitudinal, circumferential and edge cracks, to obtain dynamic stress intensity factor. Also included are the stress and deflection analysis as time response. The validity of the results obtained from the research is verified by comparing with results obtained for numerical static analysis with analytical solution and previously published by other researchers, and good agreement is obtained.
URI: http://hdl.handle.net/123456789/2322
Appears in:Thesis - Mechanical Engineering

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