scholarly journals Synthesis and Outlook

2021 ◽  
pp. 227-242
Author(s):  
Olaf Kolditz ◽  
Uwe-Jens Görke ◽  
Heinz Konietzky ◽  
Jobst Maßmann ◽  
Mathias Nest ◽  
...  
Keyword(s):  
Numerical Methods ◽  
Stress Redistribution ◽  
Research Project ◽  
Model Comparisons ◽  
Damage And Fracture ◽  
Fracture Processes ◽  
Swelling And Shrinking ◽  
Pressure Driven

AbstractAs a result of the GeomInt research project (Chap. 1) a broad combined experimental and numerical platform for the investigation of discontinuities due to swelling and shrinking processes (WP1, Sect. 2.3), pressure-driven percolation (WP2, Sect. 2.4) and stress redistribution (WP3, Sect. 2.4) for important reservoir and barrier rocks (clay, salt, crystalline) has been developed. Model comparisons for damage and fracture processes driven by different processes provide information on the optimal areas of application of the numerical methods (Sect. 2.5).

Random Lattice Modeling of Quasi-Brittle Fracture in Cementitious Materials: A State of the Art

2016 ◽  
Vol 847 ◽  
pp. 121-127
Author(s):  
Alessandro Fascetti ◽  
John E. Bolander ◽  
Nicola Nisticò
Keyword(s):  
Numerical Methods ◽  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Historical Perspective ◽  
State Of The Art ◽  
Lattice Models ◽  
Cementitious Materials ◽  
Random Lattice ◽  
Concrete Materials ◽  
Fracture Processes

Lattice models established themselves as a powerful tool to simulate fracture processes in cementitious materials such as concrete. The paper presents the main features of this method, together with the advancements in the modeling of fracture of concrete materials. A historical perspective is also given, highlighting advantages and drawbacks of the existing fracture mechanics theories and numerical methods.

Damage and Fracture during Contact between a Spherical Indenter and Ice: Experimental Results and Finite Element Simulations

2013 ◽  
Vol 577-578 ◽  
pp. 609-612
Author(s):  
Rocky S. Taylor ◽  
Ian J. Jordaan
Keyword(s):  
Finite Element ◽  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Spherical Indenter ◽  
Material Behavior ◽  
Fracture Mechanisms ◽  
Damage And Fracture ◽  
Discrete Fracture ◽  
Element Removal ◽  
Fracture Processes

Effective modeling of ice material behavior requires treatment of both damage and fracture. In this paper, a discussion of local ice damage and fracture processes observed during laboratory-scale indentation experiments conducted on unconfined polycrystalline ice using a spherical indenter is provided. Particular emphasis is placed on the interplay between fracture and extrusion processes corresponding to the failure of ice under a single zone of high contact pressure. Simulations have been conducted using a continuum damage mechanics user-material routine in conjunction with element removal techniques to simulate pressure-softening and discrete fracture processes, respectively. Simulation results provide good agreement with test data and provide important insights into interplay between damage and fracture mechanisms associated with compressive ice failure. Finite element modeling was found to work well for modeling pressure softening effects and for replicating the effects of discrete fracture events. For interactions involving multiple failure events, further work is needed to develop models that account for random aspects of fracture associated with flaw structure, contact geometry and the geometry of individual spalls.

Damage and fracture processes of concrete using acoustic emission parameters

2016 ◽  
Vol 18 (2) ◽  
pp. 267-278 ◽  
Author(s):  
Xiangqian Fan ◽  
Shaowei Hu ◽  
Jun Lu
Keyword(s):  
Acoustic Emission ◽  
Damage And Fracture ◽  
Fracture Processes
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