Prof. em. Dr.-Ing. Helmut Stumpf
- Emeritus
- Lehrstuhl für Allgemeine Mechanik
- Institut für Computational Engineering
- Fakultät für Bau- und Umwelt-
ingenieurwissenschaften - Raum IA 3/144
- Fon +49 (0)234 /32-27385
- Fax +49 (0)234 /32-14154
- E-Mail: Helmut.Stumpf@rub.de
Lehre
Forschung
- xxx
Kurzer Lebenslauf
- 1994
- xx
Publikationen
Dynamical evolution of fracture process region in ductile materials, International Journal of Solids and Structures, (2009). |
BibTeX:
@article{Stumpf2009,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus},
title = {Dynamical evolution of fracture process region in ductile materials},
journal = {International Journal of Solids and Structures},
year = {2009},
url = {http://linkinghub.elsevier.com/retrieve/pii/S0749641908000636}
}
|
The fundamental role of nonlocal and local balance laws of material forces in finite elastoplasticity and damage mechanics, International Journal of Solids and Structures, Vol. 43(13), pp. 3940-3959, (2006). |
BibTeX:
@article{Makowski2006,
author = {Makowski, Jerzy and Stumpf, Helmut and Hackl, Klaus},
title = {The fundamental role of nonlocal and local balance laws of material forces in finite elastoplasticity and damage mechanics},
journal = {International Journal of Solids and Structures},
year = {2006},
volume = {43},
number = {13},
pages = {3940-3959},
url = {http://linkinghub.elsevier.com/retrieve/pii/S002076830500212X}
}
|
On the Analysis of Damage Localization as Precursor of Macro-Cracks, Springer,, In Fracture of Nano and Engineering Materials and Structures, Springer Netherlands, (2006). |
| Abstract: In damage mechanics it is well-known that localization zones are often precursors of macro-cracks. Correspondingly, in fracture mechanics extended experimental investigations (e.g. Klemm and Kalthoff, 1984; Bertram and Kalthoff, 2003) have shown that at the tip of a crack there is no stress singularity, instead, in front of the crack a small process zone can be observed caused by intensive dislocation motion in the case of ductile materials as metals or by intensive microcracking in the case of brittle materials as limestone or granite. At the same time high temperatures develop in the process zone. The size of the process zone depends strongly on the material properties. For glass the process zone is very small, but a very high temperature can be measured there. Another essential feature is the fact that the process zone evolves with high speed, if the crack moves with high speed. |
BibTeX:
@inproceedings{Stumpf2006,
author = {Stumpf, Helmut and Hackl, Klaus},
title = {On the Analysis of Damage Localization as Precursor of Macro-Cracks},
booktitle = {Fracture of Nano and Engineering Materials and Structures},
journal = {Springer},
publisher = {Springer Netherlands},
year = {2006},
note = {Proceedings of the 16th European Conference of Fracture, Alexandroupolis, Greece, July 3–7, 2006},
doi = {http://dx.doi.org/10.1007/1-4020-4972-2}
}
|
A framework for the nonlocal analysis of inelastic deformations and defect evolution in shells, In Shell Structures: Theory and Applications, , pp. 169-174, Taylor&Francis Group, London, (2006). |
BibTeX:
@inproceedings{Stumpf2006a,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus},
title = {A framework for the nonlocal analysis of inelastic deformations and defect evolution in shells},
booktitle = {Shell Structures: Theory and Applications},
publisher = {Taylor&Francis Group, London},
year = {2006},
pages = {169-174}
}
|
A framework for the nonlocal analysis of inelastic deformations and defect evolution in shells, In Shell Structures: Theory and Applications, , pp. 169-173, (2005). |
BibTeX:
@inproceedings{Stumpf2005,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus},
title = {A framework for the nonlocal analysis of inelastic deformations and defect evolution in shells},
booktitle = {Shell Structures: Theory and Applications},
year = {2005},
pages = {169-173}
}
|
Nonlocal Damage Theories Based On Balances Of Material Forces (2005). |
BibTeX:
@inproceedings{Stumpf2005a,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus},
title = {Nonlocal Damage Theories Based On Balances Of Material Forces},
year = {2005},
url = {icf11.com}
}
|
Weakly Nonlocal Theories Of Damage And Plasticity Based On Balance Of Dissipative Material Forces, Mechanics of Material Forces, (2005). |
BibTeX:
@article{Stumpf2005b,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus and Gorski, J.},
title = {Weakly Nonlocal Theories Of Damage And Plasticity Based On Balance Of Dissipative Material Forces},
journal = {Mechanics of Material Forces},
year = {2005},
url = {http://books.google.com/books?hl=en&lr=&id=TymlR6EXeUIC&oi=fnd&pg=PT345&dq=k+hackl&ots=-Xnq4A66xF&sig=v5aWvEfWjboBayLY-4tSMAkR2Hw}
}
|
On consistent weakly-nonlocal modeling of granular media, In CONFIGURATIONAL MECHANICS, , pp. 73-86, (2004). |
BibTeX:
@inproceedings{Makowski2004,
author = {Makowski, Jerzy and Stumpf, Helmut and Hackl, Klaus and Triantafyllidis, Th.},
title = {On consistent weakly-nonlocal modeling of granular media},
booktitle = {CONFIGURATIONAL MECHANICS},
year = {2004},
pages = {73-86}
}
|
Thermodynamically consistent nonlocal theory of ductile damage, MECHANICS RESEARCH COMMUNICATIONS, Vol. 31(3), pp. 355-363, (2004). |
BibTeX:
@article{Stumpf2004,
author = {Stumpf, Helmut and Makowski, Jerzy and Gorski, J. and Hackl, Klaus},
title = {Thermodynamically consistent nonlocal theory of ductile damage},
journal = {MECHANICS RESEARCH COMMUNICATIONS},
year = {2004},
volume = {31},
number = {3},
pages = {355-363}
}
|
Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi-static $, International Journal of Solids and Structures, (2003). |
BibTeX:
@article{Hackl2003b,
author = {Hackl, Klaus and Stumpf, Helmut},
title = {Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi-static $},
journal = {International Journal of Solids and Structures},
year = {2003}
}
|
Rate theory of nonlocal gradient damage-gradient viscoinelasticity, International Journal of Solids and Structures, Vol. 19(5), pp. 675-706, (2003). |
BibTeX:
@article{Saczuk2003,
author = {Saczuk, J. and Hackl, Klaus and Stumpf, Helmut},
title = {Rate theory of nonlocal gradient damage-gradient viscoinelasticity},
journal = {International Journal of Solids and Structures},
year = {2003},
volume = {19},
number = {5},
pages = {675-706}
}
|
Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi- $, International Journal of Solids and Structures, (2003). |
BibTeX:
@article{Stumpf2003,
author = {Stumpf, Helmut and Hackl, Klaus},
title = {Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi- $},
journal = {International Journal of Solids and Structures},
year = {2003},
url = {http://linkinghub.elsevier.com/retrieve/pii/S0020768302006431}
}
|
Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi-brittle materials, International Journal of Solids and Structures, Vol. 40(6), pp. 1567-1584, (2003). |
BibTeX:
@article{Stumpf2003a,
author = {Stumpf, Helmut and Hackl, Klaus},
title = {Micromechanical concept for the analysis of damage evolution in thermo-viscoelastic and quasi-brittle materials},
journal = {International Journal of Solids and Structures},
year = {2003},
volume = {40},
number = {6},
pages = {1567-1584}
}
|
Gradient theories of ductile and brittle damage: a thermodynamical consistent framework and computational issues, In COMPUTATIONAL FLUID AND SOLID MECHANICS 2003, VOLS 1 AND 2, PROCEEDINGS, , pp. 659-661, (2003). |
BibTeX:
@inproceedings{Stumpf2003b,
author = {Stumpf, Helmut and Makowski, Jerzy and Gorski, J. and Hackl, Klaus},
title = {Gradient theories of ductile and brittle damage: a thermodynamical consistent framework and computational issues},
booktitle = {COMPUTATIONAL FLUID AND SOLID MECHANICS 2003, VOLS 1 AND 2, PROCEEDINGS},
year = {2003},
pages = {659-661}
}
|
Brittle damage and finite elastoplasticity: From microtheories to nonlocal gradient and local models with numerical applications, In Plasticity, Damage and Fracture at Macro, Micro and Nanoscale, , pp. 343-345, NEAT Press, Fulton, Maryland USA, (2002). |
BibTeX:
@inproceedings{Stumpf2002,
author = {Stumpf, Helmut and Makowski, Jerzy and Hackl, Klaus},
title = {Brittle damage and finite elastoplasticity: From microtheories to nonlocal gradient and local models with numerical applications},
booktitle = {Plasticity, Damage and Fracture at Macro, Micro and Nanoscale},
publisher = {NEAT Press, Fulton, Maryland USA},
year = {2002},
pages = {343-345}
}
|
On nonlocal gradient model of inelastic heterogeneous media, Journal of Theoretical and Applied Mechanics, Vol. 40, pp. 205-234, (2002). |
BibTeX:
@article{Stumpf2002a,
author = {Stumpf, Helmut and Saczuk, J.},
title = {On nonlocal gradient model of inelastic heterogeneous media},
journal = {Journal of Theoretical and Applied Mechanics},
year = {2002},
volume = {40},
pages = {205-234}
}
|
Thermodynamically based macro- and micromodelling of damage phenomena, (submitted), , pp. ?, (2001). |
BibTeX:
@article{Makowski2001,
author = {Makowski, Jerzy and Hackl, Klaus and Stumpf, Helmut},
title = {Thermodynamically based macro- and micromodelling of damage phenomena},
journal = {(submitted)},
year = {2001},
pages = {?}
}
|
Thermodynamically based concept for the modelling of continua with microstructure and evolving defects, International Journal of Solids and Structures, Vol. 38, pp. 1943-1961, (2001). |
BibTeX:
@article{Makowski2001a,
author = {Makowski, Jerzy and Stumpf, Helmut},
title = {Thermodynamically based concept for the modelling of continua with microstructure and evolving defects},
journal = {International Journal of Solids and Structures},
year = {2001},
volume = {38},
pages = {1943-1961}
}
|
A continuum model accounting for defect and mass densities in solids with inelastic material behaviour, International Journal of Solids and Structures, Vol. 38, pp. 9545-9568, (2001). |
BibTeX:
@article{Saczuk2001a,
author = {Saczuk, J. and Stumpf, Helmut and Vallee, C.},
title = {A continuum model accounting for defect and mass densities in solids with inelastic material behaviour},
journal = {International Journal of Solids and Structures},
year = {2001},
volume = {38},
pages = {9545-9568}
}
|
Biomechanische Studie Zur Analyse Verschiedener Arthrodesentechniken Kleiner Gelenke, Biomedizinische Technik/Biomedical Engineering, Vol. 46(s1), pp. 314-315, (2001). |
BibTeX:
@article{Schmidt2001,
author = {Schmidt, K. and Schaaf, I. and Schopphoff, Egbert and Mickley, Klaus and Lange, H. and Stumpf, Helmut and Hackl, Klaus and Demitzel, R.},
title = {Biomechanische Studie Zur Analyse Verschiedener Arthrodesentechniken Kleiner Gelenke},
journal = {Biomedizinische Technik/Biomedical Engineering},
year = {2001},
volume = {46},
number = {s1},
pages = {314-315}
}
|
On a generalized concept for the analysis of crack growth and material damage, International Journal of Solids and Structures, Vol. 17, pp. 991-1028, (2001). |
BibTeX:
@article{Stumpf2001,
author = {Stumpf, Helmut and Saczuk, J.},
title = {On a generalized concept for the analysis of crack growth and material damage},
journal = {International Journal of Solids and Structures},
year = {2001},
volume = {17},
pages = {991-1028}
}
|
General model of finite elastoplasticity with numerical applications to localization phenomena and shakedown of structures, In Plastic and Viscoplastic Response of Materials and Metal Forming, , pp. 59-61, NEAT Press, Fulton, Maryland USA, (2000). |
BibTeX:
@inproceedings{Hackl2000,
author = {Hackl, Klaus and Stumpf, Helmut},
title = {General model of finite elastoplasticity with numerical applications to localization phenomena and shakedown of structures},
booktitle = {Plastic and Viscoplastic Response of Materials and Metal Forming},
publisher = {NEAT Press, Fulton, Maryland USA},
year = {2000},
pages = {59-61}
}
|
A generalized model of oriented continuum with defects, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 80, pp. 147-169, (2000). |
BibTeX:
@article{Stumpf2000,
author = {Stumpf, Helmut and Saczuk, J.},
title = {A generalized model of oriented continuum with defects},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {2000},
volume = {80},
pages = {147-169}
}
|
Shakedown at finite-plastic strains, In Inelastic Analysis of Structures under Variable Loads Theory and Engineering Applications, Vol. 83, pp. 31-47, Kulwer Acad. Publ. Dordrecht–Boston-London, (2000). |
BibTeX:
@inproceedings{Stumpf2000a,
author = {Stumpf, Helmut and Schieck, Berthold},
title = {Shakedown at finite-plastic strains},
booktitle = {Inelastic Analysis of Structures under Variable Loads Theory and Engineering Applications},
publisher = {Kulwer Acad. Publ. Dordrecht–Boston-London},
year = {2000},
volume = {83},
pages = {31-47}
}
|
Determination of the driving force acting on a kinked crack, Archive of Applied Mechanics (Ingenieur Archiv), Vol. 69, pp. 337-344, (1999). |
BibTeX:
@article{Le1999,
author = {Le, K. C. and Schütte, Henning and Stumpf, Helmut},
title = {Determination of the driving force acting on a kinked crack},
journal = {Archive of Applied Mechanics (Ingenieur Archiv)},
year = {1999},
volume = {69},
pages = {337-344}
}
|
Jump conditions in the non-linear theory of thin irregular shells, Journal of Elasticity, Vol. 54, pp. 1-26, (1999). |
BibTeX:
@article{Makowski1999,
author = {Makowski, Jerzy and Pietraszkiewicz, W. and Stumpf, Helmut},
title = {Jump conditions in the non-linear theory of thin irregular shells},
journal = {Journal of Elasticity},
year = {1999},
volume = {54},
pages = {1-26}
}
|
A shell finite element for large strain elastoplasticity with anisotropies - Part I: Shell theory and variational principle, International Journal of Solids and Structures, Vol. 36, pp. 5399-5424, (1999). |
BibTeX:
@article{Schieck1999,
author = {Schieck, B. and Smolenski, W. M. and Stumpf, Helmut},
title = {A shell finite element for large strain elastoplasticity with anisotropies - Part I: Shell theory and variational principle},
journal = {International Journal of Solids and Structures},
year = {1999},
volume = {36},
pages = {5399-5424}
}
|
On a general concept for structured media with evolving defects, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 79, pp. S203-S206, (1999). |
BibTeX:
@article{Stumpf1999,
author = {Stumpf, Helmut},
title = {On a general concept for structured media with evolving defects},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1999},
volume = {79},
pages = {S203-S206}
}
|
On fibre bundle approach to a damage analysis, Int. J. Eng. Sci., Vol. 36, pp. 1741-1762, (1998). |
BibTeX:
@article{Fu1998,
author = {Fu, M. F. and Saczuk, J. and Stumpf, Helmut},
title = {On fibre bundle approach to a damage analysis},
journal = {Int. J. Eng. Sci.},
year = {1998},
volume = {36},
pages = {1741-1762}
}
|
Dissipative driving force in ductile crystals and the strain localization phenomenon, Int. J. Plast., Vol. 14, pp. 1109-1131, (1998). |
BibTeX:
@article{Le1998,
author = {Le, K. C. and Schütte, Henning and Stumpf, Helmut},
title = {Dissipative driving force in ductile crystals and the strain localization phenomenon},
journal = {Int. J. Plast.},
year = {1998},
volume = {14},
pages = {1109-1131}
}
|
Strain measures, integrability condition and frame indifference in the theory of oriented media, International Journal of Solids and Structures, Vol. 35, pp. 783-798, (1998). |
BibTeX:
@article{Le1998a,
author = {Le, K. C. and Stumpf, Helmut},
title = {Strain measures, integrability condition and frame indifference in the theory of oriented media},
journal = {International Journal of Solids and Structures},
year = {1998},
volume = {35},
pages = {783-798}
}
|
Strain localization in stress-resultant theory of shells, Mech. Res. Commun., Vol. 25, pp. 455-465, (1998). |
BibTeX:
@article{Makowski1998,
author = {Makowski, Jerzy and Stumpf, Helmut},
title = {Strain localization in stress-resultant theory of shells},
journal = {Mech. Res. Commun.},
year = {1998},
volume = {25},
pages = {455-465}
}
|
Finite element analysis of smooth, folded and multi-shell structures, Computer Methods in Applied Mechanics and Engineering, Vol. 141, pp. 1-46, (1997). |
BibTeX:
@article{Chroscielewski1997,
author = {Chroscielewski, Jaczek and Makowski, Jerzy and Stumpf, Helmut},
title = {Finite element analysis of smooth, folded and multi-shell structures},
journal = {Computer Methods in Applied Mechanics and Engineering},
year = {1997},
volume = {141},
pages = {1-46}
}
|
The asymmetry of the tangent stiffness matrix in finite elastoplasticity, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 77, pp. S297-S298, (1997). |
BibTeX:
@article{Schieck1997,
author = {Schieck, B. and Stumpf, Helmut},
title = {The asymmetry of the tangent stiffness matrix in finite elastoplasticity},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1997},
volume = {77},
pages = {S297-S298}
}
|
The application of tensor algebra on manifolds to nonlinear continuum mechanics - Invited survey article, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 77, pp. 327-339, (1997). |
BibTeX:
@article{Stumpf1997,
author = {Stumpf, Helmut and Hoppe, Ulrich},
title = {The application of tensor algebra on manifolds to nonlinear continuum mechanics - Invited survey article},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1997},
volume = {77},
pages = {327-339}
}
|
A model of elastoplastic bodies with continuously distributed dislocations, Int. J. Plast., Vol. 12, pp. 611-627, (1996). |
BibTeX:
@article{Le1996,
author = {Le, K. C. and Stumpf, Helmut},
title = {A model of elastoplastic bodies with continuously distributed dislocations},
journal = {Int. J. Plast.},
year = {1996},
volume = {12},
pages = {611-627}
}
|
On the symmetry of tangent operators in nonlinear mechanics, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 75, pp. 189-198, (1995). |
BibTeX:
@article{Makowski1995,
author = {Makowski, Jerzy and Stumpf, Helmut},
title = {On the symmetry of tangent operators in nonlinear mechanics},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1995},
volume = {75},
pages = {189-198}
}
|
The appropriate corotational rate, exact formula for the plastic spin and constitutive model for finite elastoplasticity, International Journal of Solids and Structures, Vol. 32, pp. 3643-3667, (1995). |
BibTeX:
@article{Schieck1995,
author = {Schieck, B. and Stumpf, Helmut},
title = {The appropriate corotational rate, exact formula for the plastic spin and constitutive model for finite elastoplasticity},
journal = {International Journal of Solids and Structures},
year = {1995},
volume = {32},
pages = {3643-3667}
}
|
Extended evolution-equations for the multiplicative finite elastoplasticity, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 74, pp. T160-T162, (1994). |
BibTeX:
@article{Stumpf1994,
author = {Stumpf, Helmut and Badur, J.},
title = {Extended evolution-equations for the multiplicative finite elastoplasticity},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1994},
volume = {74},
pages = {T160-T162}
}
|
Theory and analysis of shells undergoing finite elastic-plastic strains and rotations, Acta Mechanica, Vol. 106, pp. 1-21, (1994). |
BibTeX:
@article{Stumpf1994a,
author = {Stumpf, Helmut and Schieck, B.},
title = {Theory and analysis of shells undergoing finite elastic-plastic strains and rotations},
journal = {Acta Mechanica},
year = {1994},
volume = {106},
pages = {1-21}
}
|
The singular elastostatic field due to a crack in rubber-like materials, Journal of Elasticity, Vol. 32, pp. 183-222, (1993). |
BibTeX:
@article{Le1993,
author = {Le, K. C. and Stumpf, Helmut},
title = {The singular elastostatic field due to a crack in rubber-like materials},
journal = {Journal of Elasticity},
year = {1993},
volume = {32},
pages = {183-222}
}
|
On intrinsic geometry of continua with microstructure, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 73, pp. T337-T339, (1993). |
BibTeX:
@article{Makowski1993,
author = {Makowski, Jerzy and Hoppe, Ulrich and Stumpf, Helmut},
title = {On intrinsic geometry of continua with microstructure},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1993},
volume = {73},
pages = {T337-T339}
}
|
Deformation analysis for finite elastic-plastic strains in a lagrangean-type description, International Journal of Solids and Structures, Vol. 30, pp. 2639-2660, (1993). |
BibTeX:
@article{Schieck1993,
author = {Schieck, B. and Stumpf, Helmut},
title = {Deformation analysis for finite elastic-plastic strains in a lagrangean-type description},
journal = {International Journal of Solids and Structures},
year = {1993},
volume = {30},
pages = {2639-2660}
}
|
Theoretical and computational aspects in the shakedown analysis of finite elastoplasticity, Int. J. Plast., Vol. 9, pp. 583-602, (1993). |
BibTeX:
@article{Stumpf1993,
author = {Stumpf, Helmut},
title = {Theoretical and computational aspects in the shakedown analysis of finite elastoplasticity},
journal = {Int. J. Plast.},
year = {1993},
volume = {9},
pages = {583-602}
}
|
On a generalization of elastoplastic models within the frame of extended thermodynamics, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 73, pp. T274-T277, (1993). |
BibTeX:
@article{Stumpf1993a,
author = {Stumpf, Helmut and Badur, J.},
title = {On a generalization of elastoplastic models within the frame of extended thermodynamics},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1993},
volume = {73},
pages = {T274-T277}
}
|
Adaptation of elastoplastic membrane shells, Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM), Vol. 73, pp. T357-T359, (1993). |
BibTeX:
@article{Stumpf1993b,
author = {Stumpf, Helmut and Le, K. C.},
title = {Adaptation of elastoplastic membrane shells},
journal = {Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM)},
year = {1993},
volume = {73},
pages = {T357-T359}
}
|
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