Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Transverse Cracking of Rock with a Dissimilar Inclusion Under Tension: Effect of Loading Rate and Inclusion Diameter
Abstract The rate-dependent tensile failure of rock with a cement inclusion was experimentally and numerically investigated to reveal the coupled dynamic response of inclusion-containing heterogeneous rock structures. Brazilian discs (BDs) with differently sized inclusion cores made of Portland cement were compressed using a split Hopkinson pressure bar loading system. The inclusions in the BD specimens changed the observed failure patterns compared to the splitting results observed in traditional monolithic rock BDs. The failure patterns observed in the composite rock–cement depend on the loading rate, inclusion size, and material strengths. The tensile BD failure patterns fall into three classes: single and double deflection along the interface with the inclusion and direct penetration through the heterogeneous structure. As the inclusion diameter or loading rate is increased, the failure pattern of the BD generally evolves from single to double deflection to penetration. The mechanism underlying the formation of the different failure patterns was further investigated using discrete element modelling. This paper may improve our understanding of the effect of loading rate on the failure and fracture behaviour of heterogeneous rock structures under tension.
Highlights Static and dynamic tensile failure characteristics of inclusion-containing rock heterogeneous structure were experimentally and numerically investigated.Failure patterns were classified into three categories in terms of loading rate and normalised inclusion diameter.The mechanism and threshold of different failure patterns were given with the assistance of DEM simulation.
Transverse Cracking of Rock with a Dissimilar Inclusion Under Tension: Effect of Loading Rate and Inclusion Diameter
Abstract The rate-dependent tensile failure of rock with a cement inclusion was experimentally and numerically investigated to reveal the coupled dynamic response of inclusion-containing heterogeneous rock structures. Brazilian discs (BDs) with differently sized inclusion cores made of Portland cement were compressed using a split Hopkinson pressure bar loading system. The inclusions in the BD specimens changed the observed failure patterns compared to the splitting results observed in traditional monolithic rock BDs. The failure patterns observed in the composite rock–cement depend on the loading rate, inclusion size, and material strengths. The tensile BD failure patterns fall into three classes: single and double deflection along the interface with the inclusion and direct penetration through the heterogeneous structure. As the inclusion diameter or loading rate is increased, the failure pattern of the BD generally evolves from single to double deflection to penetration. The mechanism underlying the formation of the different failure patterns was further investigated using discrete element modelling. This paper may improve our understanding of the effect of loading rate on the failure and fracture behaviour of heterogeneous rock structures under tension.
Highlights Static and dynamic tensile failure characteristics of inclusion-containing rock heterogeneous structure were experimentally and numerically investigated.Failure patterns were classified into three categories in terms of loading rate and normalised inclusion diameter.The mechanism and threshold of different failure patterns were given with the assistance of DEM simulation.
Transverse Cracking of Rock with a Dissimilar Inclusion Under Tension: Effect of Loading Rate and Inclusion Diameter
Ju, Minghe (Autor:in) / Li, Jianchun (Autor:in) / Zhao, Jian (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Solution for a crack embedded in thermal dissimilar elliptic inclusion
| British Library Online Contents | 2016
Solution for a crack embedded in thermal dissimilar elliptic inclusion
| British Library Online Contents | 2016
Solution for a crack embedded in thermal dissimilar elliptic inclusion
| British Library Online Contents | 2016
Solution for a crack embedded in thermal dissimilar elliptic inclusion
| British Library Online Contents | 2016