Three dimensional efficient meshfree simulation of large deformation failure evolution in soil medium

An efficient Galerkin meshfree formulation for three dimensional simulation of large deformation failure evolution in soils is presented. This formulation utilizes the stabilized conforming nodal integration, where for the purpose of stability and efficiency a Lagrangian smoothing strain at nodal po...

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Bibliographic Details
Published inScience China Technological Sciences Vol. 54; no. 3; pp. 573 - 580
Main Authors Wang, DongDong, Li, ZhuoYa, Li, Ling, Wu, YouCai
Format Journal Article
LanguageEnglish
Published Heidelberg SP Science China Press 01.03.2011
Subjects
Engineering
three dimensions
stabilized conforming nodal integration
meshfree method
large deformation
failure evolution
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Summary:An efficient Galerkin meshfree formulation for three dimensional simulation of large deformation failure evolution in soils is presented. This formulation utilizes the stabilized conforming nodal integration, where for the purpose of stability and efficiency a Lagrangian smoothing strain at nodal point is constructed and thereafter the internal energy is evaluated nodally. This formulation ensures the linear exactness, efficiency and spatial stability in a unified manner and it makes the conventional Galerkin meshfree method affordable for three dimensional simulation. The three dimensional implementation of stabilized conforming nodal integration is discussed in details. To model the failure evolution in soil medium a coupled elasto-plastic damage model is used and an objective stress integration algorithm in combination of elasto-damage predictor and plastic corrector method is employed for stress update. Two typical numerical examples are shown to demonstrate the effectiveness of the present method for modeling large deformation soil failure.
ISSN:1674-7321
1862-281X
DOI:10.1007/s11431-010-4287-7