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  • 1
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    Dislocations faster than the speed of sound (1999)
    In:  Science, Bonn, Inst. f. Theoret. Geodäsie, vol. 283, no. 5404, pp. 965, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1999
    Keywords: Dislocation ; Fracture ; velocity ; Rock mechanics ; Acoustics ; Seismology
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Magnetic Bond-Order Potential for Iron (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-06-15
    Description: Author(s): M. Mrovec, D. Nguyen-Manh, C. Elsässer, and P. Gumbsch We present a magnetic bond-order potential (BOP) that is able to provide a correct description of both directional covalent bonds and magnetic interactions in iron. This potential, based on the tight binding approximation and the Stoner model of itinerant magnetism, forms a direct bridge between the... [Phys. Rev. Lett. 106, 246402] Published Tue Jun 14, 2011
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Phonon Emission Induced Dynamic Fracture Phenomena (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-02-24
    Description: Author(s): F. Atrash, A. Hashibon, P. Gumbsch, and D. Sherman We use molecular dynamics simulations to calculate the phonon energy emitted during rapid crack propagation in brittle crystals. We show that this energy is different for different crack planes and propagation directions and that it is responsible for various phenomena at several length scales: ener... [Phys. Rev. Lett. 106, 085502] Published Wed Feb 23, 2011
    Keywords: Condensed Matter: Structure, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Ab initio investigation of surface stress response to charging of transition and noble metals (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-03-22
    Description: Author(s): J.-M. Albina, C. Elsässer, J. Weissmüller, P. Gumbsch, and Y. Umeno First-principles electronic-structure calculations based on density functional theory with the local density approximation were carried out to investigate the effect of tangential strain on the work function for a set of noble and transition metals. For elements of the same series, the stress-charge... [Phys. Rev. B 85, 125118] Published Wed Mar 21, 2012
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Elastic and plastic anisotropy after straining of nanocrystalline palladium (2012)
    American Physical Society (APS)
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    Publication Date: 2012-02-05
    Description: Author(s): D. V. Bachurin and P. Gumbsch Atomistic simulations of uniaxial straining of three-dimensional nanocrystalline palladium along different loading paths were performed at room temperature and at a constant strain rate of 10 8 s −1 . It is found that both the elastic behavior and plastic behavior of the specimen display a pronounced a... [Phys. Rev. B 85, 085407] Published Fri Feb 03, 2012
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Dipole formation and yielding in a two-dimensional continuum dislocation model (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-09-30
    Description: Author(s): D. Dickel, K. Schulz, S. Schmitt, and P. Gumbsch While a Taylor-type yield stress, proportional to the square-root of the dislocation density, may appear at a macroscopic scale, it can be shown with discrete dislocation simulations that it does not accurately describe dislocation motion on the scale of individual dislocations. In this article, we ... [Phys. Rev. B 90, 094118] Published Mon Sep 29, 2014
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Controlling factors for the brittle-to-ductile transition in tungsten single crystals (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-11-13
    Description: Materials performance in structural applications is often restricted by a transition from ductile response to brittle fracture with decreasing temperature. This transition is currently viewed as being controlled either by dislocation mobility or by the nucleation of dislocations. Fracture experiments on tungsten single crystals reported here provide evidence for the importance of dislocation nucleation for the fracture toughness in the semibrittle regime. However, it is shown that the transition itself, in general, is controlled by dislocation mobility rather than by nucleation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gumbsch -- Riedle -- Hartmaier -- Fischmeister -- New York, N.Y. -- Science. 1998 Nov 13;282(5392):1293-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Metallforschung, Seestrasse 92, 70174 Stuttgart, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9812888" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Dislocations faster than the speed of sound (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-12
    Description: It is thought that dislocations cannot surpass the sound barrier at the shear wave velocity because the energy spent in radiation has a singularity there. Atomistic simulations show that dislocations can move faster than the speed of sound if they are created as supersonic dislocations at a strong stress concentration and are subjected to high shear stresses. This behavior is important for the understanding of low-temperature deformation processes such as mechanical twinning and may be relevant for the dynamics of tectonic faults. The motion of the dislocations at a speed of 2 times the shear wave velocity can be understood from a linear elastic analysis, but many of the peculiarities of the supersonic dislocations are dominated by nonlinear effects that require a realistic atomistic description.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gumbsch -- Gao -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):965-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Metallforschung, Seestrasse 92, 70174 Stuttgart, Germany. Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9974385" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    The ultrasmoothness of diamond-like carbon surfaces (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-09-06
    Description: The ultrasmoothness of diamond-like carbon coatings is explained by an atomistic/continuum multiscale model. At the atomic scale, carbon ion impacts induce downhill currents in the top layer of a growing film. At the continuum scale, these currents cause a rapid smoothing of initially rough substrates by erosion of hills into neighboring hollows. The predicted surface evolution is in excellent agreement with atomic force microscopy measurements. This mechanism is general, as shown by similar simulations for amorphous silicon. It explains the recently reported smoothing of multilayers and amorphous transition metal oxide films and underlines the general importance of impact-induced downhill currents for ion deposition, polishing, and nanopattering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moseler, Michael -- Gumbsch, Peter -- Casiraghi, Cinzia -- Ferrari, Andrea C -- Robertson, John -- New York, N.Y. -- Science. 2005 Sep 2;309(5740):1545-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fraunhofer Institute of Mechanics of Materials, Wohlerstrasse 11, 79108 Freiburg, Germany. mos@iwm.fhg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16141070" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Materials science. Modeling strain hardening the hard way (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-27
    Description: The plastic deformation of metals results in strain hardening, that is, an increase in the stress with increasing strain. Materials engineers can provide a simple approximate description of such deformation and hardening behavior. In his perspective, Gumbsch discusses work by Madec et al. who have undertaken the formidable task of computing the physical basis for the development of strain hardening by individually following the fate of all the dislocations involved. Their simulations show that the collinear dislocation interaction makes a substantial contribution to strain hardening. It is likely that such simulations will play an important role in guiding the development of future engineering descriptions of deformation and hardening.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gumbsch, Peter -- New York, N.Y. -- Science. 2003 Sep 26;301(5641):1857-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fraunhofer-Institut fur Werkstoffmechanik, Freiburg, Germany. gumbsch@iwm.fhg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14512610" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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