A large deformation particle method based on the Krongauz-Belytschko corrected-gradient meshfree method with Lagrangian kernels is developed. In this form, the gradient is corrected by a linear transformation so that linear completeness is satisfied. For the test functions, Shepard functions are used; this guarantees that the patch test is met. Lagrangian kernels are introduced to eliminate spurious distortions of the domain of material stability. A mass allocation scheme is developed that captures correct reflection of waves without any explicit application of traction boundary conditions. In addition, the Lagrangian kernel versions of various forms of smooth particle methods (SPH), including the standard forms and the Randles-Libersky modification are presented and studied. Results are obtained for a variety of problems that compare this method to standard forms of SPH, the Randles-Libersky correction and large deformation versions of the element-free Galerkin method.
|Number of pages
|Computer Methods in Applied Mechanics and Engineering
|Published - 2004 Mar 26
Bibliographical noteFunding Information:
The support of Office of the Naval Research and the Army Research Office is gratefully acknowledged.
Copyright 2008 Elsevier B.V., All rights reserved.
- Meshfree methods
- Particle methods
ASJC Scopus subject areas
- Computational Mechanics
- Mechanics of Materials
- Mechanical Engineering
- General Physics and Astronomy
- Computer Science Applications