20.500.12556/DKUM-70489 Development of a conceptual material model for structured materials - S_BRICK Razvoj konceptualnega materialnega modela za strukturne materiale - S_BRICK 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. 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. geomechanics soft rocks hard soils constitutive material models structure destructuring numerical modeling geomehanika mehke kamnine trde zemljine struktura destrukturizacija konstitutivni materialni modeli BRICK numerično modeliranje true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-05-15 13:20:19 2018-05-15 13:21:58 2022-08-01 19:24:14 2019-07-11 18:09:05 2005 0 0 str. 32-43 št. 1 Letn. 2 2005 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 624.131 215987712 1050339 1854-0171 URN:SI:UM:DK:UTENLJBD Acta_geotechnica_Slovenica_2005_Vukadin,_Likar,_Jovicic_Development_of_a_conceptual_material_model_for_structured_materials_-S_BRICK.pdf Acta_geotechnica_Slovenica_2005_Vukadin,_Likar,_Jovicic_Development_of_a_conceptual_material_model_for_structured_materials_-S_BRICK.pdf 1 BD401C74EC1F446D732FE11CC7080891 1ae6683aff63c1750a8a36560b1758f0df316fb1215932d2d284eca0cb2395db f529f11c-7c0f-11eb-bb7a-00155d0001ca 20.500.12556/dkum/81893beb-a548-4e99-8e94-281f6212d535 https://dk.um.si/Dokument.php?lang=slv&id=124735 http://fgserver3.fg.um.si/journal-ags/2005-1/article-3.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=124734 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0