Prof. Roger A. Sauer, Ph.D.
Contact
Aachen Institute for Advanced Study in Computational Engineering Science (AICES)RWTH Aachen University
Schinkelstrasse 2
52056 Aachen
Germany
Phone: +49 241 80 99129
Fax: +49 241 80 628498
Email: sauer (AT) aices (DOT) rwthaachen (DOT) de
Education
PhD in Computational Mechanics, University of California at Berkeley, USA, 2006
MSc in Computational Mechanics, University of California at Berkeley, USA, 2003
Dipl.Ing. in Civil Engineering, University of Karlsruhe, Germany, 2002
Exchange student at the University of Edinburgh, Scotland, 1998/99
Professional Career
since July 2014: Associate Professor in Mechanical Engineering
since Jan 2014: Deputy Scientific Director of the Graduate School AICES
2012  2014: Member of the Junges Kolleg, NRW Academy of the Sciences and Arts
since Jan 2010: Research group leader at AICES, RWTH Aachen University, Germany
2009  2014: Funded by the Emmy Noether program of the DFG
2008  2009: Young research group leader at the Institute for Continuum Mechanics, Leibniz University Hannover, Germany
2007  2008: Post Doc. at the Institute of Mechanics and Computational Mechanics, Leibniz University Hannover, Germany
2002  2006: Research and teaching assistant at the Department of Civil Engineering, University of California at Berkeley, USA
Research Interests
Nonlinear continuum mechanics, advanced finite element methods, multiscale methods, contact mechanics, biomechanical adhesion and selfcleaning surface mechanisms
Research group website: Computational Contact and Adhesion Mechanics
Teaching
WS 2010/11: Computational Contact Mechanics
WS 2011/12: Computational Contact Mechanics
SS 2012: Nonlinear Finite Element Methods for Solids
WS 2012/13: Computational Contact Mechanics
SS 2013: Nonlinear Finite Element Methods for Solids
SS 2013: From Molecular to Continuum Physics II
WS 2013/14: Computational Contact Mechanics: scheduled in 115 Rogowski on Tuesdays from 13:15am  15:45pm, starting from Oct. 15th.
SS 2014: Nonlinear Finite Element Methods for Solids: introductory lecture held on April 9th from 10am to 11am in 115 Rogowski. Lecture notes and exercises will be posted on L2P
SS 2014: From Molecular to Continuum Physics II. Lecture notes and exercises will be posted on L2P
Publications: Book Chapters


Osman, M., Rasool, R., Sauer, R.A.: "Computational aspects of selfcleaning surface mechanisms", in K.L. Mittal, editor, Advances in Contact Angle, Wettability and Adhesion, Vol. 1, Wiley, 2013, pdf  


Sauer, R.A.: "Computational contact formulations for soft body adhesion", in Li, S. and Sun, B., editors, Advances in Soft Matter Mechanics, pp. 5593, Springer, 2012, pdf  


Sauer, R.A.: "Challenges in computational nanoscale contact mechanics", in MuellerHoeppe, D., Loehnert, S. and Reese, S., editors, Recent Developments and Innovative Applications in Computational Mechanics, pp. 3946, Springer, 2011, pdf 
Refereed Journal Publications
2014  


Corbett, C.J., Sauer, R.A.: "Threedimensional isogeometrically enriched finite elements for mixedmode contact and debonding", submitted, 2014  


Osman, M., Sauer, R.A.: "A parametric study of the hydrophobicity of rough surfaces based on finite element computations", Colloids and Surfaces A: Physicochem. Eng. Aspects 461, pp 119125, 2014  


Duong, T.X., Sauer, R.A.: "An accurate quadrature technique for the contact boundary in 3D finite element computations", submitted, 2014  


Schmidt, M.G., Sauer, R.A., Ismail, A.E.: "Multiscale treatment of mechanical contact problems involving thin polymeric layers", Modell. Simul. Mater. Sci. Eng. 22, 045012, 2014, pdf  


Gautam, S.S., Sauer, R.A.: "A composite time integration scheme for dynamic adhesion and its application to gecko spatula peeling", Int. J. Comput. Methods, accepted, 2014  


Sauer, R.A.: "Stabilized finite element formulations for liquid membranes and their application to droplet contact", Int. J. Numer. Meth. Fluids 75(7), pp. 519545, 2014, pdf  


Sauer, R.A.: "A contact theory for surface tension driven systems", Math. Mech. Solids, published online, 2014, pdf  


Mergel, J.C., Sauer, R.A.: "On the optimum shape of thin adhesive strips for various peeling directions", J. Adhesion 90(56), pp. 526544, 2014, pdf  


Corbett, C.J., Sauer, R.A.: "NURBSenriched contact finite elements", Comput. Methods Appl. Mech. Engrg. 275, pp. 5575, 2014, pdf  


Mergel, J.C., Sauer, R.A., Saxena, A.: "Computational optimization of adhesive microstructures based on a nonlinear beam formulation", Struct. Multidisc. Optim., published online, 2014, pdf  


Sauer, R.A., Mergel, J.C.: "A geometrically exact finite beam element formulation for thin film adhesion and debonding", Finite Elem. Anal. Des. 86, pp. 120135, 2014, pdf  


Sauer, R.A., De Lorenzis, L.: "An unbiased computational contact formulation for 3D friction", Int. J. Numer. Meth. Engng., accepted, 2014  


Sauer, R.A., Duong, X.T, Corbett, C.J.: "A computational formulation for constrained solid and liquid membranes considering isogeometric finite elements", Comput. Methods Appl. Mech. Engrg. 271, pp. 4868, 2014, preprint, final pdf  
2013  


Gautam, S.S., Sauer, R.A.: "An energymomentumconserving temporal discretization scheme for adhesive contact problems", Int. J. Numer. Meth. Engng. 93(10), pp. 10571081, 2013, pdf  


Sauer, R.A.: "Local finite element enrichment strategies for 2D contact computations and a corresponding postprocessing scheme", Comput. Mech. 52(2), pp. 301319, 2013, pdf  


Sauer, R.A., De Lorenzis, L.: "A computational contact formulation based on surface potentials", Comput. Methods Appl. Mech. Engrg. 253, pp. 369395, 2013, pdf  


Saxena, A., Sauer, R.A.: "Combined gradientstochastic optimization with negative circular masks for large deformation topologies", Int. J. Numer. Meth. Engng. 93(6), pp. 635663, 2013, pdf  
2012  


Sauer, R.A.: "Advances in the computational modeling of the gecko adhesion mechanism", J. Adhes. Sci. Technol., Special Issue on Bioinspired Adhesion, published online, 2012, pdf  


Sauer, R.A., Holl, M.: "A detailed 3D finite element analysis of the peeling behavior of a gecko spatula", Comp. Meth. Biomech. Biomed. Engrg., published online, 2012, pdf  
2011  


Sauer, R.A.: "The peeling behavior of thin films with finite bending stiffness and the implications on gecko adhesion", J. Adhesion 87 (78), pp. 624643, 2011, pdf  


Sauer, R.A.: "Enriched contact finite elements for stable peeling computations", Int. J. Numer. Meth. Engng. 87, pp. 593616, 2011, pdf  
2010  


Sauer, R.A.: "A computational model for nanoscale adhesion between deformable solids and its application to gecko adhesion", J. Adhes. Sci. Technol. 24, pp. 18071818, 2010, pdf  
2009  


Sauer, R.A., Wriggers, P.: "Formulation and analysis of a 3D finite element implementation for adhesive contact at the nanoscale", Comput. Methods Appl. Mech. Engrg. 198, pp. 38713883, 2009, pdf  


Sauer, R.A.: "Multiscale modeling and simulation of the deformation and adhesion of a single gecko seta", Comp. Meth. Biomech. Biomed. Engng. 12(6), pp. 627640, 2009, pdf  
2008  


Sauer, R.A., Li, S.: "An atomistically enriched continuum model for nanoscale contact mechanics and its application to contact scaling", J. Nanosci. Nanotech. 8(7), pp. 37573773, 2008, pdf  


Sauer, R.A., Li, S.: "The composite Eshelby Tensors and their application to homogenization", Acta Mech. 197, pp. 6396, 2008  
2007  


Sauer, R.A., Li, S.: "An atomic interactionbased continuum model for adhesive contact mechanics", Finite Elem. Anal. Des. 43(5), pp. 384396, 2007, pdf  


Sauer, R.A., Li, S.: "A contact mechanics model for quasicontinua", Int. J. Numer. Meth. Engrg. 71(8), pp. 931962, 2007, pdf  


Li, S., Wang, G., Sauer, R.A.: "The Eshelby Tensors in a finite spherical domain: II. Applications in homogenization", J. Appl. Mech. 74(4), pp. 784797, 2007  


Li, S., Sauer, R.A., Wang, G.: "The Eshelby Tensors in a finite spherical domain: I. Theoretical formulations", J. Appl. Mech. 74(4), pp. 770783, 2007  
2005  


Wang, G., Li, S., Sauer, R.: "A circular inclusion in a finite domain: II. The NeumannEshelby problem", Acta. Mech. 179(12) pp. 91110, 2005  


Li, S., Sauer, R., Wang, G.: "A circular inclusion in a finite domain: I. The DirichletEshelby problem", Acta. Mech. 179(12) pp. 6790, 2005 
Other Publications
2014  


Osman, M., Sauer, R.A.: "Quasistatic analysis of selfcleaning surface mechanisms", Proc. 22nd UK Conference on Computational Mechanics (ACME2014), pp. 324227, 2014, pdf  
2013  


Rasool, R., Osman, M., Sauer, R.A.: "Computational modeling of liquid droplets moving on rough surfaces", Proc. Appl. Math. Mech. 13, pp. 233234, 2013  
2012  


Rasool, R., Sauer, R.A., Osman, M.: "Internal flow analysis for slow moving small droplets in contact with hydrophobic surfaces", Proc. Appl. Math. Mech. 12, pp. 489490, 2012  
2011  


Osman, M., Sauer, R.A.: "A twodimensional computational droplet contact model", Proc. Appl. Math. Mech. 11, pp. 103104, 2011  
2010  


Osman, M., Sauer, R.A.: "Mechanical modeling of particledroplet interaction motivated by the study of selfcleaning mechanisms", Proc. Appl. Math. Mech. 10(1), pp. 8586, 2010  
2009  


Sauer, R.A.: "A computational contact model for nanoscale rubber adhesion", Constitutive Models for Rubber VI, G. Heinrich et al. (Eds.), pp. 4752, 2009, pdf  


Sauer, R.A.: "A threedimensional multiscale finite element model describing the adhesion of a gecko seta", Proc. Appl. Math. Mech. 9, pp. 157158, 2009  
2008  


Sauer, R.A.: "A finite element seta model for studying gecko adhesion", ASME Conf. Proc., IMECE200867193, pp. 149150, 2008  


Sauer, R.A.: "An atomic interactionbased rod formulation for modeling gecko adhesion", Proc. Appl. Math. Mech. 8, pp. 1019310194, 2008  
2007  


Sauer, R.A., Li, S.: "An atomic interactionbased continuum model for computational multiscale contact mechanics", Proc. Appl. Math. Mech. 7, pp. 40800294080030, 2007  
2006  


Sauer, R.A.: "An atomic interactionbased continuum model for computational multiscale contact mechanics", Dissertation, University of California at Berkeley, 2006  
2003  


Sauer, R.A.: "The 2D finite Eshelby tensor for a circular inclusion", Master thesis, University of California at Berkeley, 2003  
2002  


Sauer, R.A.: "Development and numerical implementation of a threedimensional elastoplastic model for the computation of concrete structures", Diplomarbeit, University of Karlsruhe, Germany, 2002 