NBS contact detection algorithm for bodies of similar size

Munjiza, Antonio; Andrews, K. R. F.

doi:10.1002/(sici)1097-0207(19980915)43:1<131::aid-nme447>3.0.co;2-s

Cited by 334 publications

(170 citation statements)

References 4 publications

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“…The FDEM has found wide application in various fields of science such as structural analysis [14][15][16], rock mechanics [17,18], maritime engineering [19], biomedical engineering [20] and mechanical engineering [21]. Sequential CPU algorithms for FDEM problems have been developed, including Munjiza-NBS [22] and MR [23] algorithm for contact detection, combined single and a smeared crack model for fracture and fragmentation [24], penalty function method based potential contact force for contact interaction [25], and time saving algorithms for force evaluation [11]. All above mentioned algorithms are part of the open source FDEM Y2D and Y3D packages for the analysis of two dimensional problems and three dimensional problems, respectively.…”

Section: Fdem Numerical Algorithmmentioning

confidence: 99%

GPU based parallel FDEM for analysis of cable structures

2018

JCE

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GPU based parallel FDEM for analysis of cable structuresA combined finite-discrete element method, adapted for the analysis of a parallel cable element model using graphic cards, is presented in the paper. The basic objective is to speed up sequential computation time by one or two orders of magnitude. Paralelni model kabela za grafičke kartice baziran na metodi konačno diskretnih elemenata U radu je prikazana adaptacija kombinirane metode konačno diskretnih elemenata za paralelni model kabelskog elementa pomoću grafičkih kartica. Osnovni cilj je ubrzanje proračunskog vremena serijskog koda za jedan ili dva reda veličine. Razvijeno rješenje je implementirano unutar slobodno dostupnog FDEM Y koda. Mjerenje performansi razvijenog rješenja kao i diskusija o tome prikazani su na jednostavnim primjerima. In der Arbeit wird die Anpassung der kombinierten Methode der finiten diskreten Elemente für ein paralleles Kabelmodell anhand von Grafikkarten dargestellt. Der Schwerpunkt lag dabei auf der Beschleunigung der Berechnungszeit des Seriencodes um eine oder zwei Größenordnungen. Die entwickelte Lösung wurde innerhalb der frei zugänglichen FDEM Y Codes integriert. An einfachen Beispielen wurden die Messung der Leistungen der entwickelten Lösung sowie entsprechende Diskussionen dargestellt.

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Section: Fdem Numerical Algorithmmentioning

confidence: 99%

GPU based parallel FDEM for analysis of cable structures

2018

JCE

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“…The contact algorithms used in the FEMDEM method include two parts: contact detection and contact interaction. The contact detection is performed by an NBS (no binary search) contact detection algorithm (Munjiza and Andrews, 1998). The algorithm for contact interaction (Munjiza and Andrews, 2000) is based on the penalty function method and incorporating contact kinematics preserving energy balance.…”

Section: Post-failurementioning

confidence: 99%

A numerical study of fracture spacing and through-going fracture formation in layered rocks

Guo

Latham

Xiang

2017

International Journal of Solids and Structures

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Naturally fractured reservoirs are an important source of hydrocarbons.Computational models capable of generating fracture geometries according to geomechanical principles offer a means to create a numerical representation of a more realistic rock mass structure. In this work, the combined finite-discrete element method is applied to investigate fracture patterns in layered rocks. First, a three-layer model undergoing layer normal compression is simulated with the aim of examining the controls on fracture spacing in layered rocks. Second, a seven-layer model with low competence contrast is modelled under direct tension parallel to the layering and bending conditions with the focus on investigating through-going fracture formation across layer interfaces. The numerical results give an insight into the understanding of various mechanisms that contribute to fracture pattern development in layered rocks.

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“…The neighbor search algorithm is based on the cell mapping method [2], but can be optimized using other neighbor search algorithms -such as NBS [13], DESS [14] or CGrid [15] -depending on the application. The fast direct search (FDS) algorithm is specifically concerned with the delicate search during which contact points, normals and modes are established.…”

Section: The Fast Direct Search Algorithm (Fds)mentioning

confidence: 99%