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Viscous Elastoplastic SPH Model for Long-Distance High-Speed Landslide
Zhang WT(张炆涛); Shi CQ(石传奇); An Y(安翼); Yang SH(杨世豪); Liu QQ(刘青泉)
Conference NameSPHERIC Beijing International Workshop (SPHERIC Beijing)
Conference DateOCT 17-20, 2017
Conference PlacePeking Univ, Beijing, PEOPLES R CHINA
AbstractIn the landslide-induced debris flow problem, the soil slope experiences three stages: slope instability, debris flow and deposition. This study develops a three-dimensional smoothed particle hydrodynamics model which adopts elastoplastic viscous constitutive relation to simulate this complex process. The Drucker-Prager model with nonassociated plastic flow rule is implemented for slope instability and deposition and constant viscosity is used for propagation stage. The model is validated with laboratory dry-granular dam-break experiments. Good agreements are found between the simulated results and the laboratory data on both the shape evolution and the velocity field. Then, we use the model to study the Yigong avalanche after detailed discussion of model parameters, the time of duration, deposited scope and estimated velocity essentially agree with site survey. Thus, the model is able to simulate instability and flow of dense granular materials at both experimental and field scale, and it could be a powerful tool for the landslide-induced debris flow study.
KeywordGranular solid regime granular liquid regime viscous elastoplastic model
WOS IDWOS:000451737700012
Funding OrganizationNational Natural Science Foundation of China [11672310, 11432015]; National Basic Research Program of China [2014 CB04680202]
Indexed ByCPCI-S ; EI
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Affiliation1.{Zhang, Wentao、Shi, Chuanqi、An, Yi、Yang, Shihao} Chinese Acad Sci, Inst Mech, Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
2.{Zhang, Wentao、Shi, Chuanqi、Yang, Shihao} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.{Liu, Qingquan} Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Zhang WT,Shi CQ,An Y,et al. Viscous Elastoplastic SPH Model for Long-Distance High-Speed Landslide[C]INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS,2019:1846011.
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