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Stress-strain relations in bulk metallic glasses and colloidal dispersions

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2013

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Ballauff, Matthias
Egelhaaf, Stefan U.
Laurati, Marco
Mutch, Kevin J.
Samwer, Konrad
Siebenbürger, Miriam
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http://nbn-resolving.de/urn:nbn:de:bsz:352-265382
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http://arxiv.org/abs/1302.2030

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A comparison is made between the nonlinear rheological response of bulk metallic glass formers and of colloidal dispersions. Stress-strain curves measured after switch-on of constant deformation rates are analyzed quantitatively using a schematic model of mode coupling theory generalized to homogeneous and incompressible flows. A mapping between metallic and dispersion rheology is possible when stresses are rescaled by an entropic scale, accumulated strains by geometrical factors, and rates by the intrinsic relaxation time. Exploiting this similarity and the possibility to directly observe individual colloidal particles, we investigate the structural distortions in the colloidal system using confocal microscopy. The distortions exhibit the (from elasticity theory) expected quadrupolar but also a strong isotropic component.

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530 Physik

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ISO 690AMANN, Christian P., Matthias BALLAUFF, Stefan U. EGELHAAF, Sebastian FRITSCHI, Matthias KRÜGER, Matthias FUCHS, Marco LAURATI, Kevin J. MUTCH, Konrad SAMWER, Miriam SIEBENBÜRGER, Thomas VOIGTMANN, Fabian WEYSSER, 2013. Stress-strain relations in bulk metallic glasses and colloidal dispersions
BibTex
@unpublished{Amann2013Stres-26538,
  year={2013},
  title={Stress-strain relations in bulk metallic glasses and colloidal dispersions},
  author={Amann, Christian P. and Ballauff, Matthias and Egelhaaf, Stefan U. and Fritschi, Sebastian and Krüger, Matthias and Fuchs, Matthias and Laurati, Marco and Mutch, Kevin J. and Samwer, Konrad and Siebenbürger, Miriam and Voigtmann, Thomas and Weysser, Fabian}
}
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