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Deformation and Fracture at the Micron and Nano Scales

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Abstract

The progressively increasing demands of new science and technology to understand the behavior of materials/components and processes at the micrometer and nanometer regimes has led in the mid seventies to the development of micromechanics. In the mid nineties a new term nanomechanics was used by the author to indicate the forthcoming excessive activity in this field and point out to the need for new constitutive equations and mechanics tools to be developed in relation to the emerging fields of nanotechnology. In fact, it was only a few years earlier, that the first carbon nanotubes were produced in Japan - a unique example for the use of elasticity theory at the nanoscale - and the first bulk nanopolycrystals were produced in Russia. At the same time the first experimental observations on deformation and fracture mechanisms of nanopolycrystalline thin films were reported by the author and his co-workers in US. It was reported, among other things, that plastic deformation at the nanoscale does not take place through lattice dislocation activity but through grain boundary processes including material rotation and mass diffusion. Moreover, fracture processes occur through nanovoid nucleation and coalescence. Some of these experimental observations were numerically verified a few years later through molecular dynamics (MD) multimillion atom simulations.

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  • DOI: 10.1007/1-4020-4972-2_1
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References

  1. Aifantis, E.C., In Recent Advances in Applied Mechanics (Honorary Volume for Academician A.N. Kounadis), edited by T. Katsikadelis, D.E. Beskos and E.E. Gdoutos, NTUA, Athens, 2000, 243–254.

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  2. Aifantis, E.C., Mech. Mat., vol. 35, 259–280, 2003.

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  3. Konstantopoulos, I., Tragoudaras, D., Mokios, G., Konstantinidis, A., Zaiser, M. and Aifantis, E.C., Research in Progress.

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© 2006 Springer

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Aifantis, E.C. (2006). Deformation and Fracture at the Micron and Nano Scales. In: Gdoutos, E.E. (eds) Fracture of Nano and Engineering Materials and Structures. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4972-2_1

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  • DOI: https://doi.org/10.1007/1-4020-4972-2_1

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-1-4020-4971-2

  • Online ISBN: 978-1-4020-4972-9

  • eBook Packages: EngineeringEngineering (R0)