Papers in Reviewed Journals

• P.B. Bornemann and F. Cirak. A subdivision-based implementation of the hierarchical b-spline finite element method. Submitted for publication, 2012. Download abstract.
• R.M.J. Kramer, F. Cirak and C. Pantano. Fluid-structure interaction simulations of a tension-cone inflatable aerodynamics decelerator for atmospheric entry. Submitted for publication, 2012. Download abstract.
• T. Rüberg and F. Cirak. Subdivision-stabilised immersed b-spline finite elements for moving boundary flows. Computer Methods in Applied Mechanics and Engineering, 209–212:266–283, 2012. Download PDF of draft.
• Q. Long, P.B. Bornemann and F. Cirak. Shear-flexible subdivision shells. In print, 2011. Download PDF of draft.
• F. Cirak and Q. Long. Subdvision shells with exact boundary control and non-manifold geometry. International Journal for Numerical Methods in Engineering, 88(9):897–923, 2011. Download PDF of draft.
• R.A.K. Sanches, P.B. Bornemann and F. Cirak. Immersed b-spline (i-spline) finite element method for geometrically complex domains. Computer Methods in Applied Mechanics and Engineering, 200(13-16):1432–1445, 2011. Download PDF of draft.
• T. Rüberg and F. Cirak. An immersed finite element method with integral equation correction. International Journal for Numerical Methods in Engineering, 86(1):93–114, 2011. Download PDF of draft.
• K. Karagiozis, R. Kamakoti, F. Cirak and C. Pantano. A computational study of supersonic disk-gap-band parachutes using large-eddy simulation coupled to a structural membrane. Journal of Fluids and Structures, 27(2):175–192, 2011. Download PDF.
• J. Mosler and F. Cirak. A variational formulation for finite deformation wrinkling analysis of inelastic membranes. Computer Methods in Applied Mechanics and Engineering, 198(27-29):2087–2098, 2009. Download PDF of draft.
• F. Cirak and J.C. Cummings. Generic programming techniques for parallelizing and extending procedural finite element programms. Engineering with Computers, 24(1):1-16, 2008. Download PDF of draft.
• F. Cirak, R. Deiterding and S.P Mauch. Large-scale fluid-structure interaction simulation of viscoplastic and fracturing thin-shells subjected to shocks and detonations. Computers & Structures, 85(11-14):1049:1065, 2007. Download PDF of draft.
• R. Deiterding, F. Cirak, S.P. Mauch and D.I. Meiron. A virtual test facility for simulating detonation-induced fracture of thin flexible shells. Lecture Notes in Computer Science, 3992: 122–130, 2006. Download PDF of draft.
• F. Cirak and M. West. Decomposition-based contact response (dcr) for explicit finite element dynamics. International Journal for Numerical Methods in Engineering, 64(8):1078-1110, 2005. Download PDF of draft.
• F. Cirak, M. Ortiz, and A. Pandolfi. A cohesive approach to thin-shell fracture and fragmentation. Computer Methods in Applied Mechanics and Engineering, 194(21-24):2604–2618, 2005. Download PDF of draft.
• F. Cirak and R. Radovitzky. A lagrangian-eulerian shell-fluid coupling algorithm based on level sets. Computers & Structures, 83:491–498, 2005. Download PDF of draft.
• F. Cirak, J.E. Cisternas, A.M. Cuitino, G. Ertl, P. Holmes, I.G. Kevrekidis, M. Ortiz, H.H. Rotermund, M. Schunack, and J. Wolff. Oscillatory thermomechanical instability of an ultrathin catalyst. Science, 300:1932–1936, 2003. Download PDF.
• F. Cirak, M.J. Scott, E.K. Antonsson, M. Ortiz, and P. Schröder. Integrated modeling, finite-element analysis and engineering design for thin-shell structures using subdivision. Computer-Aided Design, 34(2):137–148, 2002. Download PDF of draft.
• F. Cirak and M. Ortiz. Fully C¹-conforming subdivision elements for finite deformation thin-shell analysis. International Journal for Numerical Methods in Engineering, 51(7):813–833, 2001. Download PDF of draft.
• F. Cirak, M. Ortiz, and P. Schröder. Subdivision surfaces: A new paradigm for thin-shell finite-element analysis. International Journal for Numerical Methods in Engineering, 47(12):2039–2072, 2000. Download PDF of draft.
• F. Cirak and E. Ramm. A-posteriori error estimation and adaptivity for nonlinear problems using the reciprocal theorem. International Journal for Numerical Methods in Engineering, 47:379–393, 2000. Download PDF of draft.
• F. Cirak and E. Ramm. A-posteriori error estimation and adaptivity for the finite-element-method using duality principles. ZAMM, 79:139–142, 1999. Download PDF of draft.
• F. Cirak and E. Ramm. A-posteriori error estimation and adaptivity for linear elasticity using the reciprocal theorem. Computer Methods in Applied Mechanics and Engineering, 156:351–362, 1998. Download PDF of draft.

Theses

• F. Cirak. Adaptive finite-element-methods for nonlinear analysis of thin-walled structures. In German. Ph.D. thesis, Institute for Structural Mechanics, University of Stuttgart, 1998. Report-Nr. 27. Download.

Patent

• Method and system for thin-shell finite-element analysis. U.S. Patent No. 6.876.596.

Selected Papers in Conference Proceedings

• R. Deiterding, F. Cirak, S.P. Mauch, and D.I. Meiron. A virtual test facility for simulating detonation-induced fracture of thin flexible shells. In Proceedings of the Eccomas CFD 2006. Eccomas CFD 2006, Egmond aan Zee, Netherlands, September 2006.
• F. Cirak. Subdivision shells: extensions and new applications. In Proceedings of the 3rd European Conference on Computational Mechanics. Eccomas, Lisbon, Portugal, June 2006.
• F. Cirak, M. Ortiz, and A. Pandolfi. Finite-element simulation of thin-shell fracture and fragmentation. In Proceedings of the 2004 ASME International Mechanical Engineering Congress and R&D Expo, Anaheim, CA, November 2004. ASME.
• F. Cirak, M. Ortiz, and A. Pandolfi. A cohesive approach to thin-shell fracture and fragmentation. In Proceedings of the XXI International Congress of Theoretical and Applied Mechanics, Warsaw, Poland, August 2004. IUTAM.
• F. Cirak and R. Radovitzky. A new lagrangian-eulerian shell-fluid coupling algorithm based on level sets. In Proceedings of Second MIT Conference on Computational Fluid and Solid Mechanics, pages 1293–1296, Cambridge, MA, June 2003. Elsevier.
• F. Cirak, M. West, S. Mauch, and R. Radovitzky. Parallel finite element computation of contact-impact problems with large deformations. In Proceedings of Second MIT Conference on Computational Fluid and Solid Mechanics, pages 197–200, Cambridge, MA, June 2003. Elsevier.
• F. Cirak and R. Radovitzky. A new lagrangian-eulerian shell-fluid coupling algorithm based on level sets. In Proceedings of IUTAM Symposium on Integrated Modeling of Fully Couplde Fluid Structure Interactions Using Analysis, Computations, and Experiments, New Brunswick, New Jersey, June 2003. IUTAM.
• F. Cirak and R. Radovitzky. A new lagrangian-eulerian shell-fluid coupling algorithm based on level sets. In Proceedings of the 44th AIAA/ASCE/ASME/AHS Structures, Structural Dynamics, and Materials Conference, Norfolk, Virginia, June 2003.
• F. Cirak, M. Ortiz, and P. Schröder. C1-conforming subdivision elements for thin-shell analysis. In Proceedings of ECCOMAS 2000, Barcelona, Spain, September 2000.
• H. Steeb, F. Cirak, and E. Ramm. On local error estimators for non-self-adjoint boundary value problems. In ZAMM, pages 545–546, 2000.
• F. Cirak, A. Schleupen, and E. Ramm. Error estimates for local and global variables using duality principles. In E. Oate and S.R. Idelsohn, editors, Conference Proceedings of Fourth WCCM, Buenos Aires, Argentina, June-July 1998.
• F. Cirak and E. Ramm. Adaptivity for nonlinear thin-walled structures. In E. Hinton, Owen D.R.J., and Onate E., editors, Computational Plasticity, Fundamentals and Applications, pages 145–163. CIMNE, March 1997.
• F. Cirak and Ramm. E. Adaptive methods for the nonlinear fe analysis of shell structures. In Proceedings of the Nafems World Congress 1997, pages 10741086, Stuttgart, Germany, April 1997. NAFEMS.
• F. Cirak and E. Ramm. Adaptive methods for nonlinear fe analysis of thin-walled structures. In F. Rammerstorfer and H.Mang, editors, Proceedings of the IUTAM/IACM Symposium on Discretization Methods in Structural Mechanics II, Vienna, Austria, June 1997. Kluwer Academic Publishers.