285 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- RWTH Aachen UniversityDE51 papers
- Jülich Supercomputing CentreDE10 papers
- Forschungszentrum JülichDE9 papers
- Indian Institute of Technology KanpurIN7 papers
- Jülich Aachen Research AllianceDE5 papers
- University of California, BerkeleyUS5 papers
- Lawrence Berkeley National LaboratoryUS4 papers
- Gdańsk University of TechnologyPL3 papers
- Beihang UniversityCN2 papers
- Centre National de la Recherche ScientifiqueFR2 papers
- Chinese Academy of SciencesCN2 papers
- Shanghai Jiao Tong UniversityCN2 papers
16 papers · 1 filter
A Bayesian regularization-backpropagation neural network model for peeling computations
Saipraneeth Gouravaraju, Jyotindra Narayan, Roger A. Sauer +1
Bayesian regularization-backpropagation neural network (BR-BPNN) model is employed to predict some aspects of the gecko spatula peeling viz. the variation of the maximum normal and…
On topology optimization of large deformation contact-aided shape morphing compliant mechanisms
Prabhat Kumar, Roger A. Sauer, Anupam Saxena
A topology optimization approach for designing large deformation contact-aided shape morphing compliant mechanisms is presented. Such mechanisms can be used in varying operating co…
Contact with coupled adhesion and friction: Computational framework, applications, and new insights
Janine C. Mergel, Julien Scheibert, Roger A. Sauer
Contact involving soft materials often combines dry adhesion, sliding friction, and large deformations. At the local level, these three aspects are rarely captured simultaneously,…
Isogeometric continuity constraints for multi-patch shells governed by fourth-order deformation and phase field models
Karsten Paul, Christopher Zimmermann, Thang X. Duong +1
This work presents numerical techniques to enforce continuity constraints on multi-patch surfaces for three distinct problem classes. The first involves structural analysis of thin…
An adaptive space-time phase field formulation for dynamic fracture of brittle shells based on LR NURBS
Karsten Paul, Christopher Zimmermann, Kranthi K. Mandadapu +3
We present an adaptive space-time phase field formulation for dynamic fracture of brittle shells. Their deformation is characterized by the Kirchhoff-Love thin shell theory using a…
A concise frictional contact formulation based on surface potentials and isogeometric discretization
Thang X. Duong, Roger A. Sauer
This work presents a concise theoretical and computational framework for the finite element formulation of frictional contact problems with arbitrarily large deformation and slidin…
A new efficient hyperelastic finite element model for graphene and its application to carbon nanotubes and nanocones
Reza Ghaffari, Roger A. Sauer
A new hyperelastic material model is proposed for graphene-based structures, such as graphene, carbon nanotubes (CNTs) and carbon nanocones (CNC). The proposed model is based on a…
Computational synthesis of large deformation compliant mechanisms undergoing self and mutual contact
Prabhat Kumar, Anupam Saxena, Roger A. Sauer
Topologies of large deformation Contact-aided Compliant Mechanisms (CCMs), with self and mutual contact, exemplified via path generation applications, are designed using the contin…
Modal analysis of graphene-based structures for large deformations, contact and material nonlinearities
Reza Ghaffari, Roger A. Sauer
The nonlinear frequencies of pre-stressed graphene-based structures, such as flat graphene sheets and carbon nanotubes, are calculated. These structures are modeled with a nonlinea…
A segmentation-free isogeometric extended mortar contact method
Thang Xuan Duong, Laura De Lorenzis, Roger A. Sauer
This paper presents a new isogeometric mortar contact formulation based on an extended finite element interpolation to capture physical pressure discontinuities at the contact boun…
Non-Linear Least-Squares Optimization of Rational Filters for the Solution of Interior Eigenvalue Problems
Jan Winkelmann, Edoardo Di Napoli
Rational filter functions can be used to improve convergence of contour-based eigensolvers, a popular family of algorithms for the solution of the interior eigenvalue problem. We p…
Adaptive local surface refinement based on LR NURBS and its application to contact
Christopher Zimmermann, Roger A. Sauer
A novel adaptive local surface refinement technique based on Locally Refined Non-Uniform Rational B-Splines (LR NURBS) is presented. LR NURBS can model complex geometries exactly a…
Efficient isogeometric thin shell formulations for soft biological materials
Farshad Roohbakhshan, Roger A. Sauer
This paper presents three different constitutive approaches to model thin rotation-free shells based on the Kirchhoff-Love hypothesis. One approach is based on numerical integratio…
High-performance generation of the Hamiltonian and Overlap matrices in FLAPW methods
Edoardo Di Napoli, Elmar Peise, Markus Hrywniak +1
One of the greatest efforts of computational scientists is to translate the mathematical model describing a class of physical phenomena into large and complex codes. Many of these…
A stabilized finite element formulation for liquid shells and its application to lipid bilayers
Roger A. Sauer, Thang X. Duong, Kranthi K. Mandadapu +1
This paper presents a new finite element (FE) formulation for liquid shells that is based on an explicit, 3D surface discretization using -continuous finite elements construct…
A Comparison of Hybridized and Standard DG Methods for Target-Based hp-Adaptive Simulation of Compressible Flow
Michael Woopen, Aravind Balan, Georg May +1
We present a comparison between hybridized and non-hybridized discontinuous Galerkin methods in the context of target-based hp-adaptation for compressible flow problems. The aim is…