A three-dimensional Generalized Finite Element Method for the simulation of wave propagation in fluid-filled fractures

2021 ◽  
Vol 386 ◽  
pp. 114136
Author(s):  
Nathan Shauer ◽  
Kenneth W. Desmond ◽  
Peter A. Gordon ◽  
Fushen Liu ◽  
C. Armando Duarte
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wave Propagation ◽  
Three Dimensional ◽  
Generalized Finite Element Method ◽  
Generalized Finite Element ◽  
Element Method

GENERALIZED FINITE ELEMENT METHOD FOR NONLINEAR THREE-DIMENSIONAL ANALYSIS OF SOLIDS

2008 ◽  
Vol 05 (01) ◽  
pp. 37-62 ◽  
Author(s):  
SERGIO PERSIVAL BARONCINI PROENÇA ◽  
IVAN FRANCISCO RUIZ TORRES
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dimensional Analysis ◽  
Damage Model ◽  
Three Dimensional ◽  
Generalized Finite Element Method ◽  
Good Tool ◽  
Selective Enrichment ◽  
Generalized Finite Element ◽  
Element Method

The Generalized Finite Element Method (GFEM) is employed in this paper for the numerical analysis of three-dimensional solids under nonlinear behavior. A brief summary of the GFEM as well as a description of the formulation of the hexahedral element based on the proposed enrichment strategy are initially presented. Next, in order to introduce the nonlinear analysis of solids, two constitutive models are briefly reviewed: Lemaitre's model, in which damage and plasticity are coupled, and Mazars's damage model suitable for concrete under increased loading. Both models are employed in the framework of a nonlocal approach to ensure solution objectivity. In the numerical analyses carried out, a selective enrichment of approximation at regions of concern in the domain (mainly those with high strain and damage gradients) is exploited. Such a possibility makes the three-dimensional analysis less expensive and practicable since re-meshing resources, characteristic of h-adaptivity, can be minimized. Moreover, a combination of three-dimensional analysis and the selective enrichment presents a valuable good tool for a better description of both damage and plastic strain scatterings.

Handling Material Discontinuities in the Generalized Finite Element Method to Solve Wave Propagation Problems

2012 ◽  
Vol 48 (2) ◽  
pp. 607-610 ◽  
Author(s):  
Werley Gomes Facco ◽  
Elson Jose Silva ◽  
Alex Sander Moura ◽  
Nai-sses Zoia Lima ◽  
Rodney Rezende Saldanha
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wave Propagation ◽  
Generalized Finite Element Method ◽  
Material Discontinuities ◽  
Generalized Finite Element ◽  
Element Method
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