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  • 1
    Digitale Medien
    Digitale Medien
    Dynamical fracture instabilities due to local hyperelasticity at crack tips (2006)
    [s.l.] : Nature Publishing Group
    Nature 439 (2006), S. 307-310 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] As the speed of a crack propagating through a brittle material increases, a dynamical instability leads to an increased roughening of the fracture surface. Cracks moving at low speeds create atomically flat mirror-like surfaces; at higher speeds, rougher, less reflective (‘mist’) and finally ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature04408
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Hyperelasticity governs dynamic fracture at a critical length scale (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 426 (2003), S. 141-146 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The elasticity of a solid can vary depending on its state of deformation. For example, metals will soften and polymers may stiffen as they are deformed to levels approaching failure. It is only when the deformation is infinitesimally small that elastic moduli can be considered constant, and hence ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nature02096
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  • 3
    Digitale Medien
    Digitale Medien
    Shock Loading of Bone-Inspired Metallic Nanocomposites (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 139 (Apr. 2008), p. 11-22 
    Details
    ISSN: 1662-9779
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Physik
    Notizen: Nanostructured composites inspired by structural biomaterials such as bone and nacreform intriguing design templates for biomimetic materials. Here we use large scale moleculardynamics to study the shock response of nanocomposites with similar nanoscopic structural featuresas bone, to determine whether bioinspired nanostructures provide an improved shock mitigatingperformance. The utilization of these nanostructures is motivated by the toughness of bone undertensile load, which is far greater than its constituent phases and greater than most syntheticmaterials. To facilitate the computational experiments, we develop a modified version of anEmbedded Atom Method (EAM) alloy multi-body interatomic potential to model the mechanicaland physical properties of dissimilar phases of the biomimetic bone nanostructure. We find that thegeometric arrangement and the specific length scales of design elements at nanoscale does not havea significant effect on shock dissipation, in contrast to the case of tensile loading where thenanostructural length scales strongly influence the mechanical properties. We find that interfacialsliding between the composite’s constituents is a major source of plasticity under shock loading.Based on this finding, we conclude that controlling the interfacial strength can be used to design amaterial with larger shock absorption. These observations provide valuable insight towardsimproving the design of nanostructures in shock-absorbing applications, and suggest that by tuningthe interfacial properties in the nanocomposite may provide a path to design materials withenhanced shock absorbing capability
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.139.11.pdf
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