This image shows Ioannis Doltsinis

Ioannis Doltsinis

PD Dr.-Ing.

Lecturer
Institute of Mechanics, Structural Analysis, and Dynamics of Aerospace Structures

Contact

+49 711 685 67788
+4971168563706

Pfaffenwaldring 27
70569 Stuttgart
Germany
Room: 0.052

Subject

Computational Mechanics of Structures and Materials
Thermomechanics
Inelastic Deformation
Process Simulation
Brittle Materials, Rupture
Stochastic Analysis, Reliability and Optimization
Computational Fluid Dynamics, Hypersonics, Re-entry Aerodynamics
Coupled Field and Domain Problems

2019

I. Doltsinis
Stiffness vs. flexibility based triangular spring cell -- a study on performance
Report ISD, University of Stuttgart, October 2019.  Eng Computat (submitted)

I. Doltsinis, M. Reck and V. Dias da Silva
Spring lattice models in the nonlinear analysis of membrane shells -- an applicability study in elasticity, plasticity and damage
Computers and Structures, 2019, in press

I. Doltsinis
Two elementary problems of shell deformation in plasticity
WSEAS Applied and Theoretical Mechanics
ISSN / E-ISSN: 1991-8747 / 2224-3429, Volume 14, 2019, Art. #16, pp. 153-158

I. Doltsinis
Stochastic aspects of the plastic limit
WSEAS Transactions on Applied and Theoretical Mechanics
ISSN / E-ISSN: 1991-8747 / 2224-3429, Volume 14, 2019, Art. 4, pp. 28-40

I. Doltsinis
From the natural continuum to the elastic spring cell in three- and two dimensions - a flexibility approach
Engineering Computations
https://doi.org/10.1108/EC-11-2018-0543

 

2018

Ataalp, A, Ertas, OF, Usta, F, Turkmen, HS, Scarpa, F, Doltsinis, I & Kazancı, Z
The Impact Behaviour of Auxetic Cellular Cores: Benchmark Against the Hexagonal Honeycomb Case
International Symposium on Dynamic Response and Failure of Composite Materials (DRaF2018), Proceedings 2018

I. Doltsinis
A note on the stiffness and flexibility natural approach to the triangular spring cell
(2018) Engineering Computations, Vol. 35 Issue: 3, pp.1130-1139, https://doi.org/10.1108/EC-09-2017-0373

 

2017

V. Dias da Silva, R. Jarzabek, M. Reck, I. Doltsinis
Application of Lattice Spring Models for Shell Structures 2017
2nd Year Report, DAAD Project Stuttgart-Coimbra, ISD-Stuttgart, 2017

I. Doltsinis
Von der Matrizentheorie der Statik zur FE-Prozesssimulation - Stadien einer Entwicklung
20. Workshop Simulation in der Umformtechnik, Institut für Umformtechnik, Stuttgart, 27.-28. März 2017
Tagungsband Massivumformung

PDF 1 | PDF 2

 

2016

I. Doltsinis, R. Jarzabek, M. Reck, V. Dias da Silva
Application of Latice Spring Models for Shell Structures
1st Year Report, DAAD Project Stuttgart-Coimbra, ISD-Stuttgart, 2016

 

2015

i. Doltsinis
Plastic Limit of Structures and Energy Principles Archives of Computational Methods in Engineering, (2015), S. 1-23, DOI 10.1007/s11831-015-9162-z
Available as 'Online First': Accessible to all users at libraries and institutions that have purchased a SpringerLink license.

 

2013

I. Doltsinis
Internal pressure - stressing and forming
Int. J. Comp. Meth. and Exp. Meas., Vol. I, Nr. 3 (2013) S. 238-248, 2013

 

2012

I. Doltsinis
pdf-Datei Stochastic Methods in Engineering
WIT Press, Southampton, Boston, 2012 

I. Doltsinis
externer Link From determinism to probabilistic analysis and stochastic simulation
Engineering Computations, Vol. 29, Iss: 7, S. 689 - 721, 2012

I. Doltsinis
externer Link Mechanical Aspects of Internal Pressure
Archives of Computational Methods in Engineering, Vol. 19, ISSUE 4, s. 467 - 498, Online First: doi:10.1007/s11831-012-9077-x, 2012

2010

 

Doltsinis, I. St., The Natural Approach - an Appraisal in the Context of Continuum Mechanics, in A. Koppel and J. Oja (Eds), Continuum Mechanics, Nova Science Publishers, Hauppauge NY, 2010.
https://www.novapublishers.com/catalog/product_info.php?products_id=10027

 

Doltsinis, Ioannis., Elements of plasticity : theory and computation. 2. edition, WIT Press, Southampton, 2010. ISBN 978-1-84564-428-4                                                                                                              Title and Contents Page

 

2008

 

Doltsinis, Ioannis: Design optimization and robustness of structures against uncertainties based on Taylor series expansion.  In: Structural Design Optimization Considering Uncertainties, Y. Tsompanakis et. al (Eds), Taylor & Francis, London 2008

 

Doltsinis, Ioannis: Studies on damage and rupture of porous ceramics.  In:  Composites with Micro- and Nano-Structure - Computational Modeling and Experiments, V. Kompis (Ed.), Springer 2008

 

Doltsinis, Ioannis: Thermomecanical deformation processes of rate sensitive solids - Material Issues and Stability.  In: Trends in Engineering Computational Technology, M. Papadrakakis and B.H.V. Topping (Eds), Saxe-Coburg Publications 2008

 

2006

 

Doltsinis, I., Kang, Z.: Design Optimisation with Randomness:  A Taylor Expansion Approach. Invited Lecture CST & ECT 2006, 12-15 September 2006, Las Palmas, Gran Canaria, Spain. In: B.H.V. Topping et al (Eds): Innovation in Engineering Computation Technology, Saxe-Coburg Publications, Dun Eaglais, Kippen, UK.

 

Doltsinis, I., Kang, Z.: Optimization and Robustness of Deformable Systems with Randomness. In: Z.H. Yao et al. (Eds) Computational Methods in Engineering and Science, Proceedings, EPMESC X, Aug. 21-23, 2006, Sanya, China, Tsinghua University Press & Springer, 2006

 

Doltsinis, I.: Continuum aspects of the natural approach. Comput. Meths Appl. Mech. Engng 195 (2006) 5403-5421 Abstract

 

Doltsinis, I., Kang, Z.: Perturbation-based stochastic FE analysis and robust design of inelastic deformation processes. Comp. Meth. Appl. Mech. Engng. 195 (2006) 2231-2251 Abstract

 

Doltsinis, I.: Strength of Porous Ceramics  -  Mechanical Testing and Numerical Modelling. In: C.A. Mota Soares et al. (eds), Computational Mechanics  -  Solids, Structures and Coupled Problems, Springer, 2006. ISBN 1-4020-4978-1

 

2005

 

Doltsinis, I., Osterstock, F.: Modelling and experimentation on the strength of porous ceramics. Arch. Comput. Meth. Engng. 12 (2005) 303-336 Abstract

 

Doltsinis, I., Kang, Z., Cheng, G.: Robust design of non-linear structures using optimization methods.  Comp. Meth. Appl. Mech. Engng. 194 (2005) 1779-1795  Abstract

 

2004


Doltsinis, I., Dattke, R.: Numerical experiments on the rupture of brittle solids - variation of microstructure, loading and dimensions. Int. J. Solids Structures, 42/2 (2004) pp. 565-579 Abstract

 

Osterstock, F., Doltsinis, I., Vansse, O.: The Brazilian reliability test and micromechanical modelling for channelled cylinders of multiphase porous ceramics. Invited Paper, Third Chinese International Conference on High Performance Ceramics, CICC-3, 9-12. Mai 2004, Shengzen, China. In: High-Performance Ceramics II, Trans. Tech. Publications, pp. 1731-1738.

 

Doltsinis, I.: Critical states in deformation processes of inelastic solids. In: B.H.V. Topping and C.A. Mota Soares (Eds), Progress in Computational Structures Technology - Invited Lectures presented at the CST 2004 Conference, Lisbon, Portugal, 7 - 9 Sept. 2004, Saxe-Coburg Publications, Stirling, Scotland, 2004.

 

Doltsinis, I., Kang, Z., Cheng, G.: Robust design of structures using optimization algorithms - path-dependent nonlinear problems. In: P. Neittaanmäki et al. (eds.), 4th European Congress on Computational Methods in Applied Sciences and Engineering - ECCOMAS 2004, Jyväskylä, Finland, 24-28 July 2004, Proceedings Vol II.
pdf-File

 

Doltsinis, I., Kang, Zhan: Robust design of structures using optimization methods. Comp. Meth. Appl. Mech. Engng. 193 (2004) 2221-2237 Abstract


2003


Doltsinis, I.:  Large deformation processes of solids - from fundamentals to numerical simulation and engineering applications, 496 pp + CD-ROM, WIT Press, Southampton, Boston, 2003 Abstract/Contents

 

Doltsinis, I.: Instabilities in deformation processes of solids. in V.P. Iu et al (Eds) Computational Methods in Engineering and Science, Proceedings of the Ninth International Conference on Enhancement and Promotion of Computational Methods in Engineering and Science (EPMESC IX), 25-28 November 2003, Macau, China. Balkema, Swets & Zeitlinger, Lisse, The Netherlands 2003.


Doltsinis, I.: Inelastic deformation processes with random parameters - methods of analysis and design. Comp. Meth. Appl. Mech. Engng. 192 (2003) 2405-2423 Abstract


Doltsinis, I., Dattke, R.: A discussion on microstructure, loading and dimensions as to the rupture of brittle materials. 9th International Conference on the Mechanical Behaviour of Materials, Geneva, Switzerland, May 25-29, 2003. CD-ROM Proceedings. PDF-File

 

2002


Doltsinis, I.: Significance of gravity in ceramic paste extrusion. in: J. Plesek (Ed.) Formulations and Constitutive Laws for Very Large Strains, Proceedings of Euromech Colloquium 430, Prague, Oct. 3-5, 2001, Institute of Thermomechanics, AS CR, 2002, p. 95-104  PDF-File

 

Doltsinis, I.: Cavity defects and failure study of ceramic components. Int. J. Forming Processes 5 (2002) 299-315 PDF-File

 

Doltsinis, I., Kang, Z.: Robust design optimization of structures with stochastic parameters. Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna University of Technology, Austria, ISBN 3-9501554-0-6 WCCM V 
PDF-File

 

Doltsinis, I.: Inelastic deformation processes with random parameters. Analysis and design.  Advanced Problems in Mechanics (APM 2002), June 27 - July 6, St. Petersburg, Book of Abstracts, pp. 39-40.


Doltsinis, I., Kang, Z.: What the engineer should know of stochastic methods. An approach to teaching. 3rd European Stochastic Experts Forum (ESEF), Baden-Baden, June 28, 2002, Proceedings, Alzenau: EASI Engineering, 2002


Doltsinis, I., Micromechanical analysis of damage and failure of ceramic materials. GAMM 2002 Annual Meeting, Augsburg, March 25-28, 2002 Book of Abstracts, pp. 32


2001


Doltsinis, I., Dattke, R., Schimmler, M.: Statistical aspects of failure of brittle ceramic materials. Computational Mechanics - New Frontiers for the New Millenium. Proceedings of the First Asian-Pacific Congress on Computational Mechanics, Sydney, Australia, 20-23 November 2001. Amsterdam, Elsevier, 2001, Vol. 1, pp. 727-736


Doltsinis, I., Significance of gravitiy in ceramic paste extrusion. EUROMECH Colloquium 430: Formulations and Constitutive Laws for Very Large Strains, Prague, Czech Republic, October 3 - 5, 2001, Book of Abstracts, p.16-18 


Doltsinis, I., Stochastic analysis and design of mechanical systems with random parameters. Keynote Lecture, EPMESC VIII, July 25-28, 2001. Proceedings, Lin Shaopei (ed.), Shanghai : San Lian Publ., 2001


Doltsinis, I., Stochastische Methoden in der Umformsimulation. 7. Workshop Numerische Methoden der Plastomechanik, Neustadt a. Rbge., 11.-13. Juni 2001. Abstracts, Inst. für Mechanik, Universität Hannover, 2001


Doltsinis, I. (ed.): Micromechanics of brittle materials and stochastic analysis of mechanical systems. Special Issue, Computer Methods in Applied Mechanics and Engineering Vol. 191(2001)


Doltsinis, I., Dattke, R., Modelling the damage of porous ceramics under internal pressure. Comp.Meth.Appl.Mech.Engng. 191 (2001) p.29-46


Doltsinis, I., Rau, F., On the ordinary distance between multivariate random systems in engineering. Comp.Meth.Appl.Mech.Engng. 191 (2001) p.133-156


2000


Doltsinis, I., Failure analysis of ceramic materials and components . 1st European Stochastic Experts Forum (ESEF), Baden-Baden, June 30, 2000. Proceedings, Alzenau : EASi Engineering, 2000


Doltsinis, I., Elements of plasticity : theory and computation. Southampton : WIT Press, 2000. ISBN 1-85312-702-7 Cover/Abstract

 

Doltsinis, I., Modelling issues in computational mechanics (Determinism and uncertainty). IACM-Expressions, Bulletin for the International Association for Computational Mechanics, 9. July 2000, 6-11.


Doltsinis, I., Rau, F., Multivariate comparison of random systems in engineering. ECCOMAS 2000, Barcelona, 11-14 Sept. 2000, Book of Abstracts, 272. Full-length paper in CD-Rom Proceedings: Computational Solid and Structural Mechanics.


Doltsinis, I. , Werner, M., Stochastic search in process design for metal forming. ECCOMAS 2000, Barcelona, 11-14 Sept. 2000, Book of Abstracts, 106.


Doltsinis, I., Dattke, R., Modelling the damage of ceramics under pore pressure. ECCOMAS 2000, Barcelona, 11-14 Sept. 2000, Book of Abstracts, 187. Full-length paper in CD-Rom Proceedings: Computational Solid and Structural Mechanics.


1999


 Doltsinis, I.St., Formänderung inelastischer Kontinua : numerische Simulationsverfahren und industrielle Anwendungen. Düsseldorf, VDI-Verl., 1999. ISBN 3-18-361610-6


Doltsinis, I. (ed.), Stochastic Analysis of Multivariate Systems in Computational Mechanics and Engineering, Barcelona : CIMNE, 1999 Cover/ Abstract

 

Doltsinis, I., Dattke, R., Studies on porous fracturing solids . Computational Methods in Engineering and Science : Internat. Conf. on Enhancement and Promotion of Computational Methods in Engineering and Science, 2-5 August, 1999, Macao (EPMESC VII). Ed. by Joao Bento et al., Amsterdam : Elsevier, 1999, p. 13-22


Doltsinis, I., Dattke, R., Studies on porous fracturing solids . Proceedings of the 6th International Conference on Modern Building Materials, Structures and Techniques, 19-22 May, Vilnius, Lithuania, p. 9-17


Doltsinis, I., Rau, F., Werner, M., Analysis of multivariate random systems. ICA-Report No. 61


Doltsinis, I., Rau, F., Werner, M., Analysis of random systems . Stochastic Analysis of Multivariate Systems in Computational Mechanics and Engineering. Ed. by I. Doltsinis, Barcelona : CIMNE, 1999, p. 9-159


Doltsinis, I., Rodic, T., Process design and sensitivity analysis in metal forming. Int. J. Numer. Meth. Engng. 45(1999) 661-692


Doltsinis, I., Schimmler, M., Modellierung und Simulation der Extension keramischer Pasten mittels eines kompressiblen Stoffansatzes. 6. Workshop Numerische Methoden der Plastomechanik, Tagungsband, Universität Hannover, Institut für Mechanik, 1999, p. 221-230


1998


 Doltsinis, I., Dattke, R. and Schimmler, M., Improvement of porous ceramic substrate for the extension of nanofiltration. 1st Annual Report: 1st May, 1997 - 30th April, 1998. ICA-Report No. 59, 1998


Doltsinis, I., Issues in modelling distributed fracturing in brittle solids with microstructure. Computational Mechanics - New Trends and Applications : Fourth World Congress on Computational Mechanics. Ed. by S.R. Idelsohn et al. CD-ROM. Barcelona  : CIMNE, 1998 PDF-File


Doltsinis, I., Methods of statistical comparison. SCAT-Communication, February, 1998, 1-78. ICA-Report No. 55


Doltsinis, I., Harding, J. and Marchese, M., Modelling the production and performance analysis of plasma-sprayed ceramic thermal barrier coatings. Archives of Computational Methods in Engineering 5(1998) 59-166


Doltsinis, I. and Schimmler, M., Modelling and simulation of the extrusion of ceramic bodies. Computational Mechanics - New Trends and Applications : Fourth World Congress on Computational Mechanics. Ed. by S.R. Idelsohn et al. CD-ROM. Barcelona  : CIME, 1998 PDF-File


Doltsinis, I. and Rau, F., A note on distances between random vectors. SCAT-Communication, January, 1998, 1-12. ICA-Report No. 54


Doltsinis, I. and Schimmler, M., A study on the extrusion of compressible viscous materials. ESAFORM Conference on Material Forming, Sophia-Antipolis (France), 17-20 March 1998 Abstract Doltsinis, I. and Rau, F., Statistical comparison - Evaluation of methods. October 1998. ICA-Report No. 60


 1997


 Doltsinis, Ioannis St., Solution of coupled systems by distinct operators . Engineering Computations 14(1997) 829-868 Abstract

 

Doltsinis, I., Dattke, R. and Schimmler, M., Improvement of porous ceramic substrate for the extension of nanofiltration. 1st Progress Report: 1st May, 1997 - 31st December, 1997. ICA-Report No. 53, December 1997


Doltsinis, I., Modelling materials and processes. Inaugural Session, Proceedings, Conference on Materials, FAST, Federazione delle associazioni scientifiche e tecniche, 10-14 Nov., 1997, Milan


Doltsinis, I., On the fracturing of brittle solids with microstructure. Advanced Methods in Materials Processing Defects, M. Predeleanu and P. Gilormini (Eds.), Elsevier Sciences, 1997


Doltsinis, I., Marchese, M., Micromechanics and finite element analysis of the production and performance of plasma-sprayed ceramic coatings. Proceedings, NAFEMS World Congress '97, 9-11 April, 1997, Stuttgart


Bertagnolli, M., Marchese, M., Jacucci, G., Doltsinis, I., Noelting, S., Thermomechanical Simulation of the Splashing of Ceramic Droplets on a Rigid Substrate. Journal of Computational Physics 133(1997) 205-221

 

Doltsinis, I.St., Handel, R., Modelling the behaviour and failure analysis of brittle microcracking materials. Numerical Methods in Engineering '96, ECCOMAS 9.-13. Sept. 1996, Paris, Wiley, Chichester 1996

 

Doltsinis, I.St., Urban, J., An adaptive operator technique for hypersonic flow computation. Computational Fluid Dynamics '96. 'ECCOMAS, 9.-13. Sept. 1996, Paris, Wiley Chichester 1996

 

Doltsinis, I.St., Urban, J., An adaptive operator technique for hypersonic flow simulation on parallel computers. Flow Simulation with High-performance Computers II, Ed. E.H. Hirschel, Notes on Numerical Fluid Mechanics, Vol. 52, Vieweg, 1996

 

Doltsinis, I.St. (ed.)., Flow in porous media. ERCOFTAC bulletin, 28, March 1996

 

Doltsinis, I.St., Haller, K.-U., Handel, R., Numerical analysis of plasma-sprayed ceramic coatings for high-temperature applications. Proceedings of the 5th EPMESC Conference, Macao, 1.-4. August 1995. Erweiterte Version in Structural Engng. and Mech. 4(1996) 679-702

 

Bertagnolli, M., Marchese, M., Jacucci, G., Doltsinis, I.St., Nölting, S., Modelling the impact of particles on a rigid substrate under plasma spraying conditions. Flash Reaction Processes, Ed. Th. W. Davies, NATO ASI Series, Series E: Applied Sciences Vol. 282, Kluwer Academic Publishers, Dordrecht, 1995

 

Doltsinis, I.St., Research for advanced technologies - interaction between university and industry. RCI - European Member Management Symposium VIII, Farnborough Aerospace Centre, Farnborough, England, 23-25 May 1995, Proceedings

 

Doltsinis, I.St., Coupling of distinct operators in parallel processing. ICIAM95, Hamburg, 3.-7. Juli, 1995

Student Guidance
Elastic/Plastic Supporting Structures and Continua
Stochastic Structural Analysis and Optimization

Biographical notice

Ioannis Doltsinis has been educated in Aerospace Engineering at Stuttgart University, Germany, where he also earned the Doctoral Degree (summa cum laude) and performed his Habilitation for the Venia Legendi.

After  completion of the Diploma studies, Doltsinis followed  in 1969 the invitation by Professor John Argyris, one of the founders of  Computational Mechanics, to join the scientific staff of the renowned Institute for Statics and Dynamics of Aerospace Structures (ISD) at the University as a research fellow for nonlinear mechanics. His responsibility was the subject of engineering plasticity developing Finite Element Methods of elastoplastic analysis, in the focus of  international efforts that time. This work extended the range of the general purpose software ASKA (Automatic System for Kinematic Analysis) to the area of inelastic large scale computations in industrial engineering practice; equally PERMAS, the commercial version of the system. In parallel, he conducted R&D in Wide Span Lightweight Structures (originating from the unique roof of the Olympic Stadium in Munich 1971), Nonlinear Fracture Mechanics and Composite Materials.

Continuing as the responsible scientist for the R&D on Thermomechanics and Mechanics of Materials, he worked on the challenging subject of large deformation of elastoplastic solids and coupled field problems with applications in industrial metal forming. He was the first to consistently model supeplastic forming for french and german aerospace industry, and  to develop process simulation on the grounds of hyperelasticity replacing in a theoretically transparent and computationally efficient manner various contemporary recipes as from hypoelasticity.  In this context he initiated in his teams and founded the development of the Finite Element Programming System (FEPS) as a research tool dealing with highly nonlinear, physically coupled problems including thermomechanical deformation processes, viscous fluid motion, fluid-structure interaction and later hypersonics with non-equilibrium chemistry. The software, conceived for research purposes, has been denoted the first handling  multiphysics (the term not been shaped at that time).

In 1984 he moved to the Institute for Computer Applications (ICA) then just founded at Stuttgart University, appointed then as the Deputy Director of the Institute.  The position enabled interdisciplinary research along new directions: microstructural failure processes in multiphase materials, CFD for hypersonics with chemical reactions and Stochastic Mechanics.  Research projects for industrial purposes refer to Plasma-sprayed Ceramic Thermal Barrier Coatings,  Strength of Porous Ceramics as for the Reliability of Filtration Equipment, Re-entry Aerothermodynamics within the European Hermes Space Shuttle Programme and Stochastic Methods in Industrial Aerospace and Automotive Engineering.  Most recent developments have focused on Stochastic Methods in Computational Mechanics.

Doltsinis was and is engaged as an expert consultant for Research Councils and Foundations within Germany (Volkswagen Foundation) and abroad (Austria, Slovenia, Romania, UK). He has been on the managing board of the European Research Community on Flow, Turbulence and Combustion (ERCOFTAC), belongs to the Scientific Advisory Committee of the Institute for Systems Engineering and Computers (INESC), Coimbra, Portugal. He is a Fellow of the Wessex Institute of Technology, UK, were he was awarded the Eminent Scientist Medal in 2012.

As a visiting Professor at the University of Trento, Italy, he transferred knowledge on advanced computational methods in engineering. Subjects tought in the Faculty  of Aerospace Engineering at Stuttgart University comprise

Loading Systems on Aircraft,Elastic-plastic Structures and Continua (continuing),Stochastic Analysis and Optimization (continuing).

Research results have been published in numerous international professional journals. He is involved in scientific publishing processes as an editor and reviewer, currently acting on the editorial board of  the International Scholarly Research Network (ISRN) Applied Mathematics. Based on experience in engineering research and educational lecturing, he authored the books

Elements of Plasticity – Theory and Computation, WIT Press, Southampton, Boston, 2000, 2010.Large Deformation Processes of Solids – Fundamentals and Engineering Applications, WIT Press, Southampton, Boston, 2004. Stochastic Methods in Engineering, WIT Press, Southampton, Boston, 2012.

Main research areas:

Computational Mechanics of Structures and Materials,Inelastic Deformation, Rupture,Process Simulation,Stochastic Analysis, Reliability and Optimization.

Biographical notices included in:

Who´s Who in Computational Science and Engineering,KÜRSCHNERS DEUTSCHER GELEHRTEN-KALENDER, Marquis Who´s Who in the World.

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