Influence of SPH Regularity and Parameters in Dynamic Fracture Phenomena

Hušek, Martin; Kala, Jiří; Hokeš, Filip; Král, Petr

doi:10.1016/j.proeng.2016.08.671

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…In the case of rock or soil material, elastic or plastic deformation is limited, and fracturing occurs at relatively low strain values (Kaklauskas and Ghaboussi, 2001;Dhanmeher, 2017). Rocks and soil additionally show predominantly brittle fracturing, where strain increments at maximum stress are small (Bieniawaski, 1967;Price, 2016;Hušek et al, 2016). For soil matrices, cohesive bonds between grains originate from causes such as cementing, frictional contacts and root networks (Cohen et al, 2009).…”

Section: Structured Mass Movementsmentioning

confidence: 99%

“…Brittle fracturing is a processes commonly understood to take place once a material internal stress has reached the yield surface, and plastic deformation has been sufficient to pass the ultimate strength point (Maurel and Cumescure, 2008;Hušek et al, 2016). A variety of approaches to fracturing exist within the literature (Ma et al, 2014;Osomo and Steeb, 2017).…”

Section: Fragmentationmentioning

confidence: 99%

“…Comparisons with observed fracture behaviour has indicated the predictive value of these schemes (Xu et al, 2010;Hušek et al, 2016). We combine the various approaches to best fit the dynamical multi-phase mass movement model that is developed.…”

Section: Fragmentationmentioning

confidence: 99%

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Towards a model for structured mass movements: the OpenLISEM hazard model 2.0a

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Geosci. Model Dev.

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Abstract. Mass movements such as debris flows and landslides differ in behaviour due to their material properties and internal forces. Models employ generalized multi-phase flow equations to adaptively describe these complex flow types. Such models commonly assume unstructured and fragmented flow, where internal cohesive strength is insignificant. In this work, existing work on two-phase mass movement equations are extended to include a full stress–strain relationship that allows for runout of (semi-)structured fluid–solid masses. The work provides both the three-dimensional equations and depth-averaged simplifications. The equations are implemented in a hybrid material point method (MPM), which allows for efficient simulation of stress–strain relationships on discrete smooth particles. Using this framework, the developed model is compared to several flume experiments of clay blocks impacting fixed obstacles. Here, both final deposit patterns and fractures compare well to simulations. Additionally, numerical tests are performed to showcase the range of dynamical behaviour produced by the model. Important processes such as fracturing, fragmentation and fluid release are captured by the model. While this provides an important step towards complete mass movement models, several new opportunities arise, such as application to fragmenting mass movements and block slides.

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