[PDF][PDF] Plates and shells: asymptotic expansions and hierarchic models
Plates and shells are characterized by (i) their midsurface S,(ii) their thickness d. The plate
or shell character is that d is small compared to the dimensions of S. In this respect, we …
or shell character is that d is small compared to the dimensions of S. In this respect, we …
A DPG method for shallow shells
We develop and analyze a discontinuous Petrov–Galerkin method with optimal test
functions (DPG method) for a shallow shell model of Koiter type. It is based on a uniformly …
functions (DPG method) for a shallow shell model of Koiter type. It is based on a uniformly …
[HTML][HTML] Modelling of thin viscoelastic shell structures under Reissner–Mindlin kinematic assumption
In this paper, we study thin viscoelastic shell structures using a constitutive equation in
hereditary integral form. An alternative mathematical formulations for several viscoelastic …
hereditary integral form. An alternative mathematical formulations for several viscoelastic …
A bilinear shell element based on a refined shallow shell model
AH Niemi - International journal for numerical methods in …, 2010 - Wiley Online Library
A four‐node shell finite element of arbitrary quadrilateral shape is developed and applied to
the solution of static and vibration problems. The element incorporates five generalized …
the solution of static and vibration problems. The element incorporates five generalized …
Asymptotic and numerical analysis of the eigenvalue problem for a clamped cylindrical shell
We are interested in the asymptotic analysis of the eigenvalue problem of clamped
cylindrical shells. We analyze the lowest eigenvalues as a function of the shell thickness t …
cylindrical shells. We analyze the lowest eigenvalues as a function of the shell thickness t …
Approximation of shell layers using bilinear elements on anisotropically refined rectangular meshes
AH Niemi - Computer methods in applied mechanics and …, 2008 - Elsevier
In this paper, we study numerical locking effects in the finite element approximation of shell
layers. The focus is on four-node degenerated elements that are perhaps the most widely …
layers. The focus is on four-node degenerated elements that are perhaps the most widely …
Dual-mixed hp-version axisymmetric shell finite element using NURBS mid-surface interpolation
A new, general hp-version axisymmetric finite element is derived for the boundary value
problems of thin linearly elastic shells of revolution, applying a complementary strain energy …
problems of thin linearly elastic shells of revolution, applying a complementary strain energy …
Bilinear finite elements for shells: Isoparametric quadrilaterals
AH Niemi, J Pitkäranta - International journal for numerical …, 2008 - Wiley Online Library
We study the accuracy and reliability of the lowest‐order bilinear shell finite element
schemes. Our approach is based mainly on a simplified shallow shell model analogous to …
schemes. Our approach is based mainly on a simplified shallow shell model analogous to …
Koiter estimate revisited
M Dauge, E Faou - Mathematical Models and Methods in Applied …, 2010 - World Scientific
We prove a general adimensional energy estimate between the solution of the three-
dimensional Lamé system on a thin clamped shell and a displacement reconstructed from …
dimensional Lamé system on a thin clamped shell and a displacement reconstructed from …
Point load on a shell
We study the fundamental (normal point load) solution for shallow shells. The solution is
expressed as a Fourier series and its properties are analyzed both at the asymptotic limit of …
expressed as a Fourier series and its properties are analyzed both at the asymptotic limit of …