- AutorIn
- Li Fan
- Titel
- Discrete Element based numerical simulation of crack formation in brittle material by swelling cement
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:105-qucosa2-340738
- Datum der Einreichung
- 24.05.2017
- Datum der Verteidigung
- 05.07.2017
- Abstract (EN)
- The presented work documents the influence of Voronoi block size and shape as well as internal mesh size on the calibrated fracture toughness KIC. It is documented that Voronoi based procedures have an inevitable error of up to ± 30%. On the other hand, this approach is able to reproduce complex fracture pattern in a realistic manner with reasonable computational power. The work propose a KIC calibration procedure and documents based on the comparison with lab tests, that crack propagation, fracture pattern as well as stress-strain behavior of brittle solids can be duplicated by calibrated Voronoi based DEM simulations. The thesis also documents a swelling law for the DEM code UDEC including parameter determination and validation on lab tests with swelling cement. Finally, calibrated concrete models with one or two holes under different boundary conditions are used to predict swelling induced cracking. Numerical predictions were compared with corresponding lab tests and showed satisfying results.
- Freie Schlagwörter (DE)
- Bruch, Diskrete-Elemente-Methode, Voronoi
- Freie Schlagwörter (EN)
- Crack, Discrete Element Method, Voronoi, fracture toughness
- Klassifikation (DDC)
- 620
- Normschlagwörter (GND)
- Sprödigkeit
- Sprödbruch
- Rissbildung
- Numerisches Verfahren
- Numerisches Modell
- Modellierung
- Quellzement
- Spröder Werkstoff
- Diskrete-Elemente-Methode
- Diskretes Modell
- GutachterIn
- Prof. Dr.-Ing. habil. Heinz Konietzky
- Prof. Dr.-Ing. Frank Schilling
- Prof. Tao Xu
- BetreuerIn Hochschule / Universität
- Prof. Dr.-Ing. habil. Heinz Konietzky
- Den akademischen Grad verleihende / prüfende Institution
- Technische Universität Bergakademie Freiberg, Freiberg
- Version / Begutachtungsstatus
- angenommene Version / Postprint / Autorenversion
- URN Qucosa
- urn:nbn:de:bsz:105-qucosa2-340738
- Veröffentlichungsdatum Qucosa
- 17.06.2019
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch