We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
An ANS/ATFs‐based unsymmetric solid‐shell finite element algorithm for high‐quality finite deformation analysis of hyper‐elastic shell.
- Authors
Ma, Ru‐Xia; Cen, Song; Li, Chen‐Feng
- Abstract
An effective updated Lagrangian (UL) algorithm is designed for extending the recent distortion‐tolerant unsymmetric 8‐node, 24‐DOF hexahedral solid‐shell element, US‐ATFHS8, to finite deformation analysis of hyper‐elastic shell structures. The distinguishing feature of this unsymmetric element is that two different interpolation schemes are employed for virtual displacement and real stress calculations, respectively. The assumed natural strain (ANS) method with shell assumptions, referring to the current configuration, is introduced to modify the strain tensors derived from the assumed virtual displacement fields in terms of isoparametric coordinates, thereby mitigating shear locking and trapezoidal locking. On the other hand, the analytical trial functions (ATFs) derived from the general solutions of homogenous governing equations for linear elasticity are updated in each increment step to obtain the incremental deformation gradient, which is then utilized for calculating the real stresses for curing the numerical difficulties in large deformation problems. Numerical examples show that the proposed algorithm enables the hyper‐elastic solid‐shell element US‐ATFHS8 to exhibit excellent performance in both regular and distorted meshes and yield considerable results even when other models cannot work.
- Subjects
STRAIN tensors; DEFORMATIONS (Mechanics); LINEAR equations; ALGORITHMS; ELASTICITY; MATERIAL point method; LAGRANGE equations; HYPERGRAPHS
- Publication
International Journal for Numerical Methods in Engineering, 2024, Vol 125, Issue 12, p1
- ISSN
0029-5981
- Publication type
Article
- DOI
10.1002/nme.7470