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
51 papers
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…
Topographic uncertainty quantification for flow-like landslide models via stochastic simulations
Hu Zhao, Julia Kowalski
Topography representing digital elevation models (DEMs) are essential inputs for computational models capable of simulating the run-out of flow-like landslides. Yet, DEMs are often…
Comparing quantum, molecular and continuum models for graphene at large deformations
Aningi Mokhalingam, Reza Ghaffari, Roger A. Sauer +1
In this paper, the validity and accuracy of three interatomic potentials and the continuum shell model of Ghaffari and Sauer [1] are investigated. The mechanical behavior of single…
A modified Coulomb's law for the tangential debonding of osseointegrated implants
Katharina Immel, Thang X. Duong, Vu-Hieu Nguyen +2
Cementless implants are widely used in orthopedic and oral surgery. However, debonding-related failure still occurs at the bone-implant interface. It remains difficult to predict s…
Automatic Generation of Efficient Linear Algebra Programs
Henrik Barthels, Christos Psarras, Paolo Bientinesi
The level of abstraction at which application experts reason about linear algebra computations and the level of abstraction used by developers of high-performance numerical linear…
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…
Triangle-Well and Ramp Interactions in One-Dimensional Fluids: A Fully Analytic Exact Solution
Ana M. Montero, Andrés Santos
The exact statistical-mechanical solution for the equilibrium properties, both thermodynamic and structural, of one-dimensional fluids of particles interacting via the triangle-wel…
Arbitrary Lagrangian--Eulerian finite element method for curved and deforming surfaces. I. General theory and application to fluid interfaces
Amaresh Sahu, Yannick A. D. Omar, Roger A. Sauer +1
An arbitrary Lagrangian--Eulerian (ALE) finite element method for arbitrarily curved and deforming two-dimensional materials and interfaces is presented here. An ALE theory is deve…
Theoretical analysis of screened many-body electrostatic interactions between charged polarizable particles
Eric B. Lindgren, Chaoyu Quan, Benjamin Stamm
This paper builds on two previous works, Lindgren et al. J. Comp. Phys. 371, 712-731 (2018) and Quan et al. arXiv:1807.05384 (2018), to devise a new method to solve the problem of…
The multiplicative deformation split for shells with application to growth, chemical swelling, thermoelasticity, viscoelasticity and elastoplasticity
Roger A. Sauer, Reza Ghaffari, Anurag Gupta
This work presents a general unified theory for coupled nonlinear elastic and inelastic deformations of curved thin shells. The coupling is based on a multiplicative decomposition…
Insight of the thermal conductivity of iron at Earth's core conditions from the newly developed direct methodology
Sheng-Ying Yue, Ming Hu
The electronic thermal conductivity of iron at Earth's core conditions is an extremely important physical property in geophysics field. However, the exact value of electronic therm…
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 finite membrane element formulation for surfactants
Farshad Roohbakhshan, Roger A. Sauer
Surfactants play an important role in various physiological and biomechanical applications. An example is the respiratory system, where pulmonary surfactants facilitate the breathi…
ChASE: Chebyshev Accelerated Subspace iteration Eigensolver for sequences of Hermitian eigenvalue problems
Jan Winkelmann, Paul Springer, Edoardo Di Napoli
Solving dense Hermitian eigenproblems arranged in a sequence with direct solvers fails to take advantage of those spectral properties which are pertinent to the entire sequence, an…
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…
Accelerating the computation of FLAPW methods on heterogeneous architectures
Davor Davidović, Diego Fabregat-Traver, Markus Höhnerbach +1
Legacy codes in computational science and engineering have been very successful in providing essential functionality to researchers. However, they are not capable of exploiting the…
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…
An isogeometric finite element formulation for phase transitions on deforming surfaces
Christopher Zimmermann, Deepesh Toshniwal, Chad M. Landis +3
This paper presents a general theory and isogeometric finite element implementation for studying mass conserving phase transitions on deforming surfaces. The mathematical problem i…
A monolithic fluid-structure interaction formulation for solid and liquid membranes including free-surface contact
Roger A. Sauer, Tobias Luginsland
A unified fluid-structure interaction (FSI) formulation is presented for solid, liquid and mixed membranes. Nonlinear finite elements (FE) and the generalized-alpha scheme are used…