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Author Abdul-Aziz, Ali; Baaklini, George Y. ; NASA Glenn Research Center, MS 6-1, Cleveland, OH 44135, United States
Source Mater Eval v 60 Issue:n 4 April 2002 p 529-534
Abstract Capabilities and expertise related to the development of links between nondestructive testing (NDT) and finite element analysis at NASA Glenn Research Center are demonstrated. Current tools to analyze data produced by computed tomography scans are exercised to help assess the damage state in high temperature structural composite materials. A utility translator was written to convert a stereolithographic data file to a suitable computer aided design (CAD) finite element analysis type file. Finite element analyses are carried out with a commercial nonlinear finite element code and the analytical results are discussed. Modeling was established by building a preprocessing and postprocessing finite element package generated model and comparing it to a model generated by the image processing software in conjunction with the preprocessing and postprocessing finite element package. Modeling issues and results are discussed in this paper. The entire process that outlines the tie between the data extracted via NDT and the finite element modeling and analysis is fully described. Further-more, the advantage of analyzing an NDT produced model versus CAD model is illustrated by showing that NDT offers more details concerning deformities and structural abnormalities that can assist greatly in the structural evaluation of tested components. In CAD modeling, on the other hand, all of the discontinuities have to be artificially modeled. (Auth abstract) XX