Methodology for Application of 3-D Stresses to Surface Damage-Based Risk Assessment

Efficient Fracture Design for Complex Turbine Engine Components

“…The points of intersection between the 2D slice plane and the 3D finite elements are identified, and the stresses are computed at the intersection points by interpolation from the 3D stress results. A new 2D finite element mesh of triangular elements is then constructed from the intersection points based on a Delauney triangularization algorithm [1][2][3]. This new 2D mesh is not used for any additional finite element stress computation, but instead is only used as a guide for the extraction of stress information from the original 3D model.…”

Probabilistic Methodology for Life Prediction of Aircraft Turbine Rotors

“…A new method has recently been developed for modeling surface damage-related crack growth using results from 3D finite element analysis (McClung et al 2004, Waldhart et al 2004. It is based on the assumption that a Mode I crack propagates in the plane normal to the maximum principal stress (for the dominant stress pair in a given mission profile) in a region that is idealized as a rectangular plate.…”

“…Illustration of a new method for definition of surface damage-related cracks using 3D finite element results: (a) import 3D finite element model, reorient to display and select initial surface crack location (GUI automatically identifies principal stress plane), and (b) slice model along principal stress plane to reveal crack propagation plane and associated rectangular plate for fracture mechanics assessment (McClung et al 2004, Waldhart et al 2004. …”