FCPAS_Tutorial_v1.0

FCPAS_Tutorial_v1.0 - F C P A S Fracture and Crack...

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Unformatted text preview: F C P A S Fracture and Crack Propagation Analysis System Version 1.0 Software & Tutorial Document May 2010 ©2010 Ali O. Ayhan, Ergun Nart ayhan@sakarya.edu.tr , enart@sakarya.edu.tr FCPAS Tutorial – Version 1.0 1 Tutorial Document for Fracture Analysis with FCPAS Introduction In this tutorial, some basic linear elastic fracture mechanics examples are included that demonstrate usage of FCPAS ( F racture and C rack P ropagation A nalysis S ystem) to solve three- dimensional fracture problems. The generation of models, meshing and application of boundary conditions and loads are done using the commercially available finite element software, ANSYS . Then, a converter program is used to convert the finite element model information, boundary conditions and loads data from ANSYS TM [1] format into FCPAS format. Finally, FCPAS Solver is run to solve the crack problem and determine the stress intensity factors for the problem of interest. The following chart shows the general algorithm and file structure of process (Figure T.1). Figure T.1 General flow of the analysis process. ANSYS TM Preprocessor o ET o Modelling o Meshing Solution Postprocessor * .elis * .node * .dlis * .sflis * .crelems convert_ansys_frac3d.exe *.elis_3d .geo writerun_frac3d.exe *.elis_3d .run P r e p r o c e s s * .crnodes frac3d.exe * .sum * .crk * .str * .stn * .out S o l u t i o n movieassembly.exe Postprocess * . tecplot * .1 FCPAS Tutorial – Version 1.0 2 The steps from ANSYS TM model generation to solving the crack problem in FRAC3D are explained in detail. The problems included in this tutorial are: 1. Two-dimensional mode-I central crack in a large isotropic medium, 2. Mode-I crack in a Compact Tension, C(T) test specimen, 3. Mode-I central crack in a finite-thickness plate. Figure T.2 General algorithm of FCPAS FCPAS’s GUI (Graphical User Interface) allows the user to follows the process in Figure T.3 in an orderly and user-friendly manner. This is the first version of the software and currently linear fracture analysis is available. ANSYS TM Preprocessor o ET o Modelling o Meshing Solution Postprocessor * .elis * .node * .dlis * .sflis * .crelems convert_ansys_frac3d.exe *.elis_3d .geo writerun_frac3d.exe *.elis_3d .run P r e p r o c e s s * .crnodes frac3d.exe * .sum * .crk * .str * .stn * .out S o l u t i o n movieassembly.exe Postprocess * . tecplot * .1 FCPAS Tab1 FCPAS Tab1 FCPAS Tab2 FCPAS Tab3 FCPAS Tab4 FCPAS Tab5-8 FCPAS Tutorial – Version 1.0 3 : If you click this button, you can work with Cracked Model Developed with ANSYS . : If you click this button, you can work with Crack Growth Analysis of An Uncracked Model. (This section is under development.) FCPAS Tutorial – Version 1.0 4 Figure T.3. FCPAS graphical user interface When you click first button, the above form comes up....
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FCPAS_Tutorial_v1.0 - F C P A S Fracture and Crack...

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