Numerical Modeling of Failure Process in Cohesive Geomaterials

2014 ◽  
pp. 39-45
Author(s):  
C. Yao ◽  
Q. H. Jiang ◽  
J. F. Shao
Keyword(s):  
Numerical Modeling ◽  
Failure Process

scholarly journals NUMERICAL MODELING AND FULL-SCALE EXPERIMENTS OF GLUED WOODEN STRUCTURES JOINT DESTRUCTION ON CARBON-FIBER DOWEL PINS

2020 ◽  
Vol 16 (2) ◽  
pp. 101-112
Author(s):  
Mikhail Vodiannikov ◽  
Galina Kashevarova ◽  
Danil Starobogatov
Keyword(s):  
Numerical Modeling ◽  
Structural Analysis ◽  
Carbon Fiber ◽  
Structural Parameters ◽  
General Structure ◽  
Failure Process ◽  
Joint Destruction ◽  
Field Tests ◽  
Full Scale ◽  
Glued Laminated Timber

This paper presents the results of numerical modeling and full-scale experiments of the failure process of a glued laminated timber beam with rigid joint in the middle. All the connecting parts are made of carbon fiber. The structural analysis is done with the finite element method (ANSYS software). The nonlinear problem was solved. The contact interaction of the structural elements in the process of deformation and fracture, as well as orthotropy of the wood, the transversely isotropic properties of the plates, and the real diagrams of the deformation of carbon fiber dowel pins were taken into account. The influence of the structural parameters of the joint on the position of the most loaded dowel pin in the joint and the bearing capacity of the general structure are investigated. To verify the structural analysis results, field tests were carried out before destruction by a stepwise increasing load on a personally designed stand. The destruction of the structure occurred according to the forecast of the numerical model as a result of the mutual slip of the glued wood layers and the destruction of the polymer matrix of the glued dowel pins with the beginning of the formation of plastic joints and the formation of cracks in the wood at the junction.

Numerical modeling on successive failure process of rock slopes caused by river erosion

2010 ◽  
pp. 1031-1036
Author(s):  
Jun Feng ◽  
Tao Yang ◽  
Zhongping Zhang ◽  
Honggang Wu
Keyword(s):  
Numerical Modeling ◽  
Failure Process ◽  
Rock Slopes ◽  
River Erosion

Numerical Simulation of Fracture Propagation of Heterogeneous Material

2012 ◽  
Vol 170-173 ◽  
pp. 581-584 ◽  
Author(s):  
Ze Qi Zhu ◽  
Qian Sheng ◽  
Xiao Dong Fu
Keyword(s):  
Image Processing ◽  
Numerical Modeling ◽  
Finite Difference ◽  
Failure Process ◽  
Heterogeneous Material ◽  
Modeling Method ◽  
Uniaxial Compression Test ◽  
Fuzzy Clustering Method ◽  
Heterogeneous Rock ◽  
Mineral Components

For the Three Gorges granite, a finite difference software package FLAC was used to study failure process of heterogeneous rock material. Based on mineral components identification results of the granite and fuzzy clustering method, the actual image date was transformed into the finite difference grid by applying image processing techniques. A convenient and efficient two-dimensional numerical modeling method for heterogeneous geomaterials was presented. Then, failure process of the granite were simulated in uniaxial compression test based on experimental strain soft model, and the stress concentration phenomenon was analyzed. The results show that the numerical modeling method based on digital image processing can be used to calculate the mechanical responses of geomaterials by taking their heterogeneities into considerations.

scholarly journals Characteristics and Dynamic Process Modeling of the Rainfall-Induced Landslide on August 21, 2020 in Hanyuan County, China

2021 ◽  
Vol 9 ◽  
Author(s):  
Weibin Yang ◽  
Fulei Wang ◽  
Yongbo Tie ◽  
Dongpo Wang ◽  
Chaojun Ouyang
Keyword(s):  
Numerical Modeling ◽  
Process Modeling ◽  
Dynamic Process ◽  
Heavy Rainfall ◽  
Failure Process ◽  
Field Investigation ◽  
Sichuan Province ◽  
Coulomb Model ◽  
Frictional Coefficients ◽  
Different Parts

On August 21, 2020, a landslide occurred in Zhonghai village of Hanyuan County, Sichuan Province, China. The landslide is triggered by two successive rounds of heavy rainfall. This landslide can be clearly divided into an initial landslide and a main landslide. The main landslide is activated by the intense impact and overloading of the initial landslide. The depth-integrated continuum method is adopted to simulate the dynamic process. Due to the complicated failure process, it is found that there is no proper unified parameters in Coulomb model which could well reproduce the two successive landslides. It implies that the dynamic process of landslides is highly associated with the characteristics of sliding bodies. Here, an implement of variable frictional coefficients for different parts is proposed and the parameters are calibrated. It is demonstrated that results from numerical modeling match well with the field investigation. The complicated landslides in two different stage can both be efficiently revealed by depth-integrated continuum modeling.

Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

2007 ◽  
Author(s):  
T. Campbell ◽  
B. de Sonneville ◽  
L. Benedet ◽  
D. J. W. Walstra ◽  
C. W. Finkl
Keyword(s):  
Numerical Modeling ◽  
Barrier Island
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