Applications of spatial data structures: Computer graphics, image processing, and GIS
Applications of spatial data structures: Computer graphics, image processing, and GIS
An Embedding of Domains Approach in Free Boundary Problems andOptimal Design
SIAM Journal on Control and Optimization
A Numerical Investigation of High-Order Finite Elements for Problems of Elastoplasticity
Journal of Scientific Computing
Computational Geometry: Algorithms and Applications
Computational Geometry: Algorithms and Applications
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The finite cell method (FCM) is an extension of a high-order finite element approximation space with the aim of simple meshing. In this paper, the FCM is implemented for J"2 flow theory with nonlinear isotropic hardening for small displacements and small strains. The Newton-Raphson iteration scheme, combined with a radial return algorithm, is applied to find approximate solutions for the underlying physically nonlinear problem. A modified quadtree integration scheme is presented for the first time to capture the geometry accurately and overcome the high calculation cost of the standard quadtree integration scheme. Numerical examples in two and three dimensions demonstrate the efficiency of the FCM and the proposed integration scheme at solving materially nonlinear problems.