Open Access
ABSTRACT
Symmetric Notches Cause Strengthening in Brittle Metallic glasses
Yun Teng1, Zhendong Sha1,*
1 International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an
Jiaotong University, Xi’an 710049, China.
* Corresponding Author: Zhendong Sha. Email: .
The International Conference on Computational & Experimental Engineering and Sciences 2021, 23(1), 18-18. https://doi.org/10.32604/icces.2021.08471
Abstract
For all engineering materials, the flaws are introduced inevitably from
fabrication, mechanical damage, and corrosion. These stress raisers always
induce catastrophic failures and it is therefore of great importance to understand
the effect of flaws on the mechanical properties of engineering materials. The
effect of flaws on metallic glasses (MGs) is a debatable topic because many
relevant works have reported notch strengthening, notch weakening and notch
insensitivity for brittle MGs. The significant notch strengthening of MGs was
attributed to the transition of failure mechanism, from catastrophic shear banding
to ductile fracture. Here we investigate systematically the influence of notch
geometry on mechanical behaviors of symmetrically notched MGs by molecular
dynamics, including the notch depth, notch height and notch sharpness. Our
work observes notch strengthening obviously in brittle MGs with a brittle failure
through shear banding. This noteworthy notch strengthening is a consequence of
the constrained growth of the plastic zone. A transition from shear banding to
homogeneous deformation within the un-notched ligament can be viewed by
increasing the notch depth when the un-notched ligament width is under the
threshold value, and also a stronger notch strengthening. Besides, the sharper
notch enhances the fracture strength more apparently. Another important finding
is the determined demand of notch configuration for observed notch
strengthening. It is found that the notch strengthening behavior would be
degraded by single-edge notch or asymmetric double-edge notches. Current
results provide important insights into the deformation and failure modes of
notched MGs, which may guide the design and engineers of MGs.
Keywords
Cite This Article
APA Style
Teng, Y., Sha, Z. (2021). Symmetric notches cause strengthening in brittle metallic glasses. The International Conference on Computational & Experimental Engineering and Sciences, 23(1), 18-18. https://doi.org/10.32604/icces.2021.08471
Vancouver Style
Teng Y, Sha Z. Symmetric notches cause strengthening in brittle metallic glasses. Int Conf Comput Exp Eng Sciences . 2021;23(1):18-18 https://doi.org/10.32604/icces.2021.08471
IEEE Style
Y. Teng and Z. Sha, "Symmetric Notches Cause Strengthening in Brittle Metallic glasses," Int. Conf. Comput. Exp. Eng. Sciences , vol. 23, no. 1, pp. 18-18. 2021. https://doi.org/10.32604/icces.2021.08471