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Title:Development of a conceptual material model for structured materials - S_BRICK
Authors:Vukadin, Vladimir (Author)
Likar, Jakob (Author)
Jovičić, Vojkan (Author)
Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Authorship owner)
Files:.pdf Acta_geotechnica_Slovenica_2005_Vukadin,_Likar,_Jovicic_Development_of_a_conceptual_material_model_for_structured_materials_-S_BRICK.pdf (586,91 KB)
 
URL http://fgserver3.fg.um.si/journal-ags/2005-1/article-3.asp
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:Materials known in literature as Soft Rocks & Hard Soils such as claystones, siltstones, flysh, hard soils, marls, etc. received a lot of attention in research community in recent years. It was demonstrated that some of these materials can be described through general theoretical framework (Cotecchia & Chandler [1]), which takes into account the structure as an intrinsic material property that is present in all natural geological materials. The influence of the structure is manifested as an increase in strength and stiffness in a material. Based on a laboratory results and existent theoretical frameworks, a further step was taken with the development of a conceptual constitutive model for structured materials. A model formulated in strain space named BRICK (Simpson [2]) was chosen as a base model and was further developed with the inclusion of structure and destructuring. The new model was named S_BRICK and was tested on a conceptual level where the results of numerical tests on structured and structure less (reconstituted) materials at different stress paths were compared. The results showed that S_BRICK was able to capture stress-strain behavior typical for structured material and could be potentially used for the modeling of Soft Rocks and Hard Soils.
Keywords:geomechanics, soft rocks, hard soils, constitutive material models, structure, destructuring, numerical modeling
Year of publishing:2005
Number of pages:str. 32-43
Numbering:št. 1, Letn. 2
ISSN:1854-0171
UDC:624.131
ISSN on article:1854-0171
COBISS_ID:1050339 Link is opened in a new window
Copyright:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
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Record is a part of a journal

Title:Acta geotechnica Slovenica
Shortened title:Acta geotech. Slov.
Publisher:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
ISSN:1854-0171
COBISS.SI-ID:215987712 New window

Secondary language

Language:Slovenian
Title:Razvoj konceptualnega materialnega modela za strukturne materiale - S_BRICK
Abstract:V strokovni literaturi se je za skupino naravnih geoloških materialov, kot so na primer glinovci, meljevci, fliši, peščenjaki, trde gline, laporji uveljavil izraz “mehke kamnine in trde zemljine”. Njihovo poglobljeno preučevanje je pokazalo, da jih lahko obravnavamo skozi enoten teoretičen okvir (Cotecchia & Chandler [1]) z upoštevanjem strukture kot ključnega materialnega parametra, ki je prisotna v vseh naravnih geoloških materialih in je odgovorna za povečanje trdnosti in togosti. Na osnovi literaturnega pregleda laboratorijskih rezultatov in z uporabo teoretičnega okvirja za strukturne materiale smo pristopili k razvoju konceptualnega konstitutivnega materialnega modela za strukturne materiale. Kot osnovni model smo izbrali BRICK model, ki ga je formuliral Simpson [2] v deformacijskem prostoru in vključuje pomembna obnašanja naravnih materialov, kot so nelinearnost, vpliv napetostne zgodovine, volumsko-napetostnega stanja. Model smo razvil tako, da upošteva strukturo in njeno destrukturizacijo, pri kompresiji, strigu in razbremenjevanju. Razviti model je preimenovan v S_BRICK, ki povezuje osnovno ime modela BRICK in črko S, ki ponazarja strukturo. Delovanje S_BRICK-a je preizkušeno na konceptualnem nivoju, s primerjavo napovedi modela za dva konceptualna materiala enega s strukturo in enega brez strukture (rekonstituiran material). Rezultati so potrdili, da model opisuje pomembne aspekte obnašanja strukturnih materialov in da predstavlja primeren izhodiščen model za modeliranje mehkih kamnin in trdih zemljin.
Keywords:geomehanika, mehke kamnine, trde zemljine, struktura, destrukturizacija, konstitutivni materialni modeli, BRICK, numerično modeliranje


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  1. Acta geotechnica Slovenica

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