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Crack Analysis By Boundary Element Method
Technical Paper
924176
Sector:
Language:
English
Abstract
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.