A stabilised displacement–volumetric strain formulation for nearly incompressible and anisotropic materials
نویسندگان
چکیده
The simulation of structural problems involving the deformations volumetric bodies is paramount importance in many areas engineering. Although use tetrahedral elements extremely appealing, discretisations are generally known as very stiff and hence often avoided typical workflows. development mixed displacement–pressure approaches has allowed to effectively overcome this problem leading a class locking-free which can compete with hexahedral while retaining obvious advantages mesh generation step. Despite such adoption technology within commercial codes not yet pervasive. This be attributed two different reasons: difficulty making standard constitutive libraries implied continuity pressure, makes application method questionable context multi-material problems. Current paper proposes strain instead pressure nodal value. Such choice leads definition modified strain-driven laws straightforward. At same time, across multimaterial interfaces understood sort kinematic constraint (stresses still remain discontinuous material interfaces). new element also opens door anisotropic laws, typically problematic elements.
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ژورنال
عنوان ژورنال: Computer Methods in Applied Mechanics and Engineering
سال: 2021
ISSN: ['0045-7825', '1879-2138']
DOI: https://doi.org/10.1016/j.cma.2021.113701