Investigation into the breakdown of continuum fracture mechanics: synthesis of recent results on silicon

Pasquale Gallo, Takashi Sumigawa, Takahiro Shimada, Yabin Yan, Takayuki Kitamura

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

The present contribution reviews some recent results on the experimental characterisation of the nanoscale fracture toughness of silicon by using pre-cracked specimens and alternatively the theory of critical distances (TCD). Later, the results are discussed to provide the ultimate dimensional limit of the continuum fracture mechanics at the nanoscale in the light of sophisticated discrete atomic simulations at the onset of brittle fracture. The results show that the fracture toughness of Si is independent of the scale, crystal orientation and the singular stress field length. This confirms the atomistic nature of the brittle fracture. Moreover, the continuum fracture mechanics fails below a singular stress field approaching 2 nm.
Original languageEnglish
Title of host publicationProceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics
Pages205-210
Number of pages6
Volume5
ISBN (Electronic)978-3-319-91989-8
DOIs
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication

Publication series

NameStructural Integrity book series
Volume5
ISSN (Print)2522-560X
ISSN (Electronic)2522-5618

Keywords

  • nanoscale
  • silicon
  • Quantum Mechanics

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    Gallo, P., Sumigawa, T., Shimada, T., Yan, Y., & Kitamura, T. (2019). Investigation into the breakdown of continuum fracture mechanics: synthesis of recent results on silicon. In Proceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics (Vol. 5, pp. 205-210). (Structural Integrity book series; Vol. 5). https://doi.org/10.1007/978-3-319-91989-8_45