A machine-learning enabled framework for quantifying uncertainties in parameters of computational models
This work presents novel extensions for combining two frameworks for quantifying both
aleatoric (ie, irreducible) and epistemic (ie, reducible) sources of uncertainties in the …
aleatoric (ie, irreducible) and epistemic (ie, reducible) sources of uncertainties in the …
[HTML][HTML] On effects of concentrated loads on perforated sensitive shells of revolution
Sensitive shells are a class of constructions with specific and perhaps unintuitive responses
to different loading scenarios. There are new emerging applications for capsules with open …
to different loading scenarios. There are new emerging applications for capsules with open …
From Displacements to Distributions: A Machine-Learning Enabled Framework for Quantifying Uncertainties in Parameters of Computational Models
This work presents novel extensions for combining two frameworks for quantifying both
aleatoric (ie, irreducible) and epistemic (ie, reducible) sources of uncertainties in the …
aleatoric (ie, irreducible) and epistemic (ie, reducible) sources of uncertainties in the …
Benchmark computations of stresses in a spherical dome with shell finite elements
AH Niemi - SIAM Journal on Scientific Computing, 2016 - SIAM
We present a computational framework for analyzing thin shell structures using the finite
element method. The framework is based on a mesh-dependent shell model which we …
element method. The framework is based on a mesh-dependent shell model which we …
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 …
Effects of Internal Boundary Layers and Sensitivity on Frequency Response of Shells of Revolution
H Hakula - Vibration, 2023 - mdpi.com
New applications introduced capsule designs with features that have not been fully
analysed in the literature. In this study, thin shells of revolution are used to model drug …
analysed in the literature. In this study, thin shells of revolution are used to model drug …
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 …
Implementing model reduction to the JuliaFEM platform
M Rapo, J Aho, H Koivurova, T Frondelius - 2018 - oulurepo.oulu.fi
JuliaFEM is an open source finite element method solver written in the Julia language. This
paper presents an implementation of two common model reduction methods: the Guyan …
paper presents an implementation of two common model reduction methods: the Guyan …
[PDF][PDF] Isogeometric shell formulation based on a classical shell model
Abstract We study a Reissner-Mindlin shell formulation for NURBS-based isogeometric
analysis. The formulation is based on a shell model which utilizes curvilinear coordinates …
analysis. The formulation is based on a shell model which utilizes curvilinear coordinates …
[BOOK][B] Best bilinear shell element: flat, twisted or curved?
AH Niemi - 2009 - aaltodoc.aalto.fi
This thesis concerns the accuracy of finite element models for shell structures. The focus is
on low-order approximations of layer and vibration modes in shell deformations with …
on low-order approximations of layer and vibration modes in shell deformations with …