Determination of onset of failure of rocks in multiple failure state triaxial tests using scale-based differential geometry

• Autorzy: Bagci U. , Mamurekli D.

Warianty tytułu

PL

Określanie punktu początkowego pękania skał w trójosiowych badaniach procesu pękania przy wykorzystaniu metod geometrii różniczkowej

• Języki publikacji: EN

Abstrakty

EN

This study presents a new method of estimating onset of failure points in multiple failure state triaxial tests of different rocks. This is done by extracting curvature landmarks and their invariant extensions using a scale-based differential geometry approach on the load-displacement curves. Altogether, the load-displacement data of 165 cored sampies of different rocks including Norite, Granite, Limestone, Sandstone, Siltstone, Marble and Halite were used during this study. It has been proved that identifying invariant signatures/features of a load-displacement curve results in locating the onset of failure points with acceptable degree of accuracy.

PL

Praca przedstawia nową metodę estymowania punktu początkowego procesu pękania różnych rodzajów skał w testach obejmujących wielokrotne oddziaływanie naprężeń trójosiowych. Metoda polega na wyodrębnianiu krzywizny powierzchni i identyfikacji niezmienników stanu odkształcenia na wykresie obciążenie – przemieszczenia przy zastosowaniu metod geometrii różniczkowej. Przeanalizowano wielkości przemieszczeń uzyskanych dla 165 próbek skalnych rożnych rodzajów, w tym norytu, granitu, wapienia, piaskowca, iłowca, marmurów oraz halitu. Wykazano, że identyfikacja niezmienników na wykresie odkształcenia w funkcji obciążenia pozwala na określenie punktu początkowego pękania skał z wystarczającą dokładnością.

Słowa kluczowe

EN

multiple failure state triaxial test; scale-based geometry; load-displacement curve

PL

wielokrotne badania obciążeń trójosiowych; geometria różniczkowa; wykres odkształcenia od obciążenia

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2009
• Tom: Vol. 54, no 1
• Strony: 55--78
• Opis fizyczny: Bibliogr. 31 poz., tab., wykr.

Twórcy

autor

Bagci U.

autor

Mamurekli D.

• PHD Student, School of Computer Science, University of Notiingham, UK,

Bibliografia

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