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==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible. Capitalize the first word of the title.
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==Abstract==
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This talk addresses the application of SPH to problems of hydro-fracturing and fluid-structure
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interaction. Simulating a hydraulic-fracture propagating in a rock with in-situ joint sets is particularly
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challenging. Traditional continuum modeling techniques have the advantage of using classical non-
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linear material models, however they often fail to accurately capture the complexity of the geometry
 +
and path of multiple intersecting fractures. In particular, mesh dependence of the fracture path,
 +
closing of an opened fracture and shear, present difficulties using these techniques. The use of the
 +
smoothed particle hydrodynamics (SPH) method for these problems is relatively recent. Mesh free
 +
methods, such as SPH, have the potential to overcome the previously mentioned difficulties of mesh
 +
based methods. Simulation of the initiation and propagation of pressure-driven fractures in brittle
 +
rocks is presented in this study. By exploiting techniques commonly used in traditional continuum
 +
methods, we have developed an elasto-plastic SPH model, which is based on the Drucker-Prager
 +
yield criterion, and the Grady-Kipp damage model. The model is validated against Brazil test data.
 +
Results are also presented the Brazil test, uni-axial compressive fracture as well as initial results for
 +
intersection of dynamic fractures with intersecting joints.
  
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Provide a maximum of 6 keywords, and avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). Be sparing with abbreviations: only abbreviations firmly established in the field should be used. These keywords will be used for indexing purposes.
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== Recording of the presentation ==
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{| style="font-size:120%; color: #222222; border: 1px solid darkgray; background: #f3f3f3; table-layout: fixed; width:100%;"
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|-
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|{{#evt:service=youtube|id=https://youtu.be/mSQGs8EqOb8|alignment=center}}
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|- style="text-align: center;"
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| Location: Technical University of Catalonia (UPC), Vertex Building.  
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|- style="text-align: center;"
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| Date: 28 - 30 September 2015, Barcelona, Spain.
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|}
  
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An abstract is required for every document; it should succinctly summarize the reason for the work, the main findings, and the conclusions of the study. Abstract is often presented separately from the article, so it must be able to stand alone. For this reason, references and hyperlinks should be avoided. If references are essential, then cite the author(s) and year(s). Also, non-standard or uncommon abbreviations should be avoided, but if essential they must be defined at their first mention in the abstract itself. -->==
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== General Information ==
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* Location: Technical University of Catalonia (UPC), Barcelona, Spain.
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* Date: 28 - 30 September 2015
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* Secretariat: [//www.cimne.com/ International Center for Numerical Methods in Engineering (CIMNE)].
  
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== External Links ==
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* [//congress.cimne.com/particles2015/frontal/default.asp Particles 2015] Official Website of the Conference.
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* [//www.cimnemultimediachannel.com/ CIMNE Multimedia Channel]
  
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==References==
  
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[1]  A.A. Savitski and E. Detournay,  “Propagation of a penny-shaped  fluid-driven fracture  in an
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impermeable rock: asymptotic solutions”,  International Journal of  Solids and Structures, 39
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6311–6337(2002).
  
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==2 The main text<!-- You can enter and format the text of this document by selecting the ‘Edit’ option in the menu at the top of this frame or next to the title of every section of the document. This will give access to the visual editor. Alternatively, you can edit the source of this document (Wiki markup format) by selecting the ‘Edit source’ option.
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[2]  D.  Deb  and R. Pramanik, “Failure  Process  of Brittle  Rock  Using  Smoothed  Particle
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Hydrodynamics”, J. Eng. Mech. 2013.139:1551-1565 (2013).
  
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[3]  R. Pramanik and D. Deb, “SPH procedures for modeling multiple intersecting discontinuities in  
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geomaterial”,  Int. J. Numer. Anal. Meth. Geomech. DOI: 10.1002/nag.2311 (2014).
  
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[4]  R. Pramanik and D. Deb, “Implementation of Smoothed Particle Hydrodynamics for Detonation
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2.1 Subsections
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of  Explosive with  Application to Rock  Fragmentation”, Rock  Mech  Rock  Eng  DOI
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10.1007/s00603-014-0657-y (2014).
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Latest revision as of 10:11, 22 October 2019

Abstract

This talk addresses the application of SPH to problems of hydro-fracturing and fluid-structure interaction. Simulating a hydraulic-fracture propagating in a rock with in-situ joint sets is particularly challenging. Traditional continuum modeling techniques have the advantage of using classical non- linear material models, however they often fail to accurately capture the complexity of the geometry and path of multiple intersecting fractures. In particular, mesh dependence of the fracture path, closing of an opened fracture and shear, present difficulties using these techniques. The use of the smoothed particle hydrodynamics (SPH) method for these problems is relatively recent. Mesh free methods, such as SPH, have the potential to overcome the previously mentioned difficulties of mesh based methods. Simulation of the initiation and propagation of pressure-driven fractures in brittle rocks is presented in this study. By exploiting techniques commonly used in traditional continuum methods, we have developed an elasto-plastic SPH model, which is based on the Drucker-Prager yield criterion, and the Grady-Kipp damage model. The model is validated against Brazil test data. Results are also presented the Brazil test, uni-axial compressive fracture as well as initial results for intersection of dynamic fractures with intersecting joints.

Recording of the presentation

Location: Technical University of Catalonia (UPC), Vertex Building.
Date: 28 - 30 September 2015, Barcelona, Spain.

General Information

External Links

References

[1] A.A. Savitski and E. Detournay, “Propagation of a penny-shaped fluid-driven fracture in an impermeable rock: asymptotic solutions”, International Journal of Solids and Structures, 39 6311–6337(2002).

[2] D. Deb and R. Pramanik, “Failure Process of Brittle Rock Using Smoothed Particle Hydrodynamics”, J. Eng. Mech. 2013.139:1551-1565 (2013).

[3] R. Pramanik and D. Deb, “SPH procedures for modeling multiple intersecting discontinuities in geomaterial”, Int. J. Numer. Anal. Meth. Geomech. DOI: 10.1002/nag.2311 (2014).

[4] R. Pramanik and D. Deb, “Implementation of Smoothed Particle Hydrodynamics for Detonation of Explosive with Application to Rock Fragmentation”, Rock Mech Rock Eng DOI 10.1007/s00603-014-0657-y (2014).

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