We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Development of a Three-Dimensional Multiscale Octree SBFEM for Viscoelastic Problems of Heterogeneous Materials.
- Authors
Xu Xu; Haitian Yang; Zhenjun Yang; Yiqian He
- Abstract
The multiscale method provides an effective approach for the numerical analysis of heterogeneous viscoelastic materials by reducing the degree of freedoms (DOFs). A basic framework of the Multiscale Scaled Boundary Finite Element Method (MsSBFEM) was presented in our previous works, but those works only addressed twodimensional problems. In order to solve more realistic problems, a three-dimensional MsSBFEM is further developed in this article. In the proposed method, the octree SBFEM is used to deal with the three-dimensional calculation for numerical base functions to bridge small and large scales, the three-dimensional image-based analysis can be conveniently conducted in small-scale and coarse nodes can be flexibly adjusted to improve the computational accuracy. Besides, the Temporally Piecewise Adaptive Algorithm (TPAA) is used to maintain the computational accuracy of multiscale analysis by adaptive calculation in time domain. The results of numerical examples show that the proposed method can significantly reduce the DOFs for three-dimensional viscoelastic analysis with good accuracy. For instance, theDOFs can be reduced by 9021 times comparedwith DirectNumerical Simulation (DNS) with an average error of 1.87% in the third example, and it is very effective in dealing with threedimensional complex microstructures directly based on images without any geometric modelling process.
- Subjects
INHOMOGENEOUS materials; NUMERICAL functions; BOUNDARY element methods; FINITE element method; NUMERICAL calculations
- Publication
CMES-Computer Modeling in Engineering & Sciences, 2024, Vol 140, Issue 2, p1831
- ISSN
1526-1492
- Publication type
Article
- DOI
10.32604/cmes.2024.048199