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2020 | OriginalPaper | Chapter

An Atomic-Level Unified Criterion for Brittle Fracture

Authors : Kai Huang, Takashi Sumigawa, Takahiro Shimada, Takayuki Kitamura

Published in: Proceedings of the Third International Conference on Theoretical, Applied and Experimental Mechanics

Publisher: Springer International Publishing

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Abstract

This paper aims to propose a unified criterion for brittle fracture of general (blunt) notches and ideal (sharp) cracks. A new fracture parameter, i.e., atomic energy release rate (ERR), for which the atomic discrete nature is fully taken into account, is defined based on the concept of atomic fracture mechanics (AFM). The results show that the proposed atomic ERR criterion works well for a nano-sized notch even when the notched sample becomes extremely small. Compared with an ideal crack, it is found that the magnitude of the critical atomic ERR at fracture is in good agreement with that of an ideal crack. Hence, brittle fracture of both a notch and a crack can be described by using a unique fracture parameter, providing a unified description at the atomic level.

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Metadata
Title
An Atomic-Level Unified Criterion for Brittle Fracture
Authors
Kai Huang
Takashi Sumigawa
Takahiro Shimada
Takayuki Kitamura
Copyright Year
2020
DOI
https://doi.org/10.1007/978-3-030-47883-4_60

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