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gallery:fracture2dtbc [2010/12/15 20:02] – smilauergallery:fracture2dtbc [2011/06/16 18:13] (current) – smilauer
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 Since the fracture parameters are best manifested in the scaling properties of the size effect law, the nominal strengths of three geometrically self-similar notched beams are simulated in a 3D finite element framework. A collection of RUCs is embeded above the notch while the rest of beam has coarse finite elements, see Figure. Python script helped to generate the embedded geometry using hanging nodes and master-slave node relation. Since the fracture parameters are best manifested in the scaling properties of the size effect law, the nominal strengths of three geometrically self-similar notched beams are simulated in a 3D finite element framework. A collection of RUCs is embeded above the notch while the rest of beam has coarse finite elements, see Figure. Python script helped to generate the embedded geometry using hanging nodes and master-slave node relation.
  
-{{:gallery:2dtbc_multiscale.png?500}}+{{:gallery:2dtbc_multiscale.png?700}}
  
 The simulation stems from damage mechanics. A fixed orientation of three perpendicular planes, aligned with material orientation axes, defines six damage variables; three for normal stress and three for shear. The OOFEM class //CompoDamageMat// handles such damage material. The left Figure shows the notched beam with embedded damaging RUCs, the right Figure displays the force-displacement curve. The simulation stems from damage mechanics. A fixed orientation of three perpendicular planes, aligned with material orientation axes, defines six damage variables; three for normal stress and three for shear. The OOFEM class //CompoDamageMat// handles such damage material. The left Figure shows the notched beam with embedded damaging RUCs, the right Figure displays the force-displacement curve.
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 The left Figure shows a detail of the three-point beam bending test, the middle Figure prediction and simulation for three beam sizes, and the right Figure fitting to the the size effect law.  The left Figure shows a detail of the three-point beam bending test, the middle Figure prediction and simulation for three beam sizes, and the right Figure fitting to the the size effect law. 
  
-{{:gallery:dsc00519a.jpg?240}} {{:gallery:30_rsize_pd_e.png?250}} {{:gallery:30_rsize_effectb.png?250}}+{{:gallery:dsc00519a.jpg?290}} {{:gallery:30_rsize_pd_e.png?300}} {{:gallery:30_rsize_effectb.png?300}}
  
 By fitting the size effect law, the fracture energy was found in the range 212 - 464 N/mm. For more information, see our article  By fitting the size effect law, the fracture energy was found in the range 212 - 464 N/mm. For more information, see our article 
-  * V. Šmilauer, C. G. Hoover, Z. P. Bažant, F. C. Caner, A. M. Waas, K. W. Shahwan: Multiscale Simulation of Fracture of Braided Composites via Repetitive Unit Cells, Engineering Fracture Mechanics, in press, 2011.+  * V. Šmilauer, C. G. Hoover, Z. P. Bažant, F. C. Caner, A. M. Waas, K. W. Shahwan: Multiscale Simulation of Fracture of Braided Composites via Repetitive Unit Cells, Engineering Fracture Mechanics, 78(6), 901-918. ISSN 0013-7944, 2011.
  
-//Created 12/2010 by Vít Šmilauer. Acknowledgements belong to C. G. Hoover, B. Patzák, Z. P. Bažant, A. M. Waas and K. W. Shahwan.//from+//Created 12/2010 by Vít Šmilauer. Acknowledgements belong also to C. G. Hoover, B. Patzák, Z. P. Bažant, A. M. Waas and K. W. Shahwan.//
gallery/fracture2dtbc.1292439728.txt.gz · Last modified: 2010/12/15 20:02 by smilauer