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Crack Analysis By Boundary Element Method
Published January 01, 1992 by Institution of Mechanical Engineers in United Kingdom
A simple and efficient approach is proposed for the analysis of crack problems occurring in mechanical components widely used in the aerospace industry.
A linear stress analysis of the cracked components is performed using the engineering analysis system BEASY, based on the boundary element method, to derive accurate predictions of the stress intensity factors corresponding to either of the three modes KI, KII or KIIi. With the proposed approach, the user has to model only the surface of the component, as opposed to its volume in finite elements. Thus, line elements in 2-D and axisymmetric problems and surface quadrilaterals or triangles in 3-D problems are used to mesh the components. The approach clearly results in substantial savings in mesh preparation effort. The paper will describe the application of the system to problems in the aerospace field and the convergence results which demonstrate the high accuracy and reliability of the technique.