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Fracture Diodes: Directional Asymmetry of Fracture Toughness

Brodnik, N. R. and Brach, S. and Long, C. M. and Ravichandran, G. and Bourdin, B. and Faber, K. T. and Bhattacharya, K. (2021) Fracture Diodes: Directional Asymmetry of Fracture Toughness. Physical Review Letters, 126 (2). Art. No. 025503. ISSN 0031-9007.

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Toughness describes the ability of a material to resist fracture or crack propagation. It is demonstrated here that fracture toughness of a material can be asymmetric, i.e., the resistance of a medium to a crack propagating from right to left can be significantly different from that to a crack propagating from left to right. Such asymmetry is unknown in natural materials, but we show that it can be built into artificial materials through the proper control of microstructure. This paves the way for control of crack paths and direction, where fracture—when unavoidable—can be guided through predesigned paths to minimize loss of critical components.

Item Type:Article
Related URLs:
URLURL TypeDescription InPhysics : Synopsis
Brach, S.0000-0003-4766-8131
Ravichandran, G.0000-0002-2912-0001
Bourdin, B.0000-0002-1312-9175
Faber, K. T.0000-0001-6585-2536
Bhattacharya, K.0000-0003-2908-5469
Additional Information:© 2021 American Physical Society. (Received 8 June 2020; accepted 23 November 2020; published 14 January 2021) This work was conducted while N. R. B. and S. B. were at Caltech. We are grateful to Paolo Celli and Kevin Korner for their help in preparing the PMMA specimens. We gratefully acknowledge the financial support of the U.S. National Science Foundation (Grants No. DMS-1535083 and No. 1535076) under the Designing Materials to Revolutionize and Engineer our Future (DMREF) Program. The development of the numerical codes used here was supported in part by the U.S. National Science Foundation DMS-1716763. The numerical simulations were performed at the Caltech high performance cluster supported in part by the Moore Foundation.
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Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20210114-143037831
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107484
Deposited By: George Porter
Deposited On:14 Jan 2021 22:54
Last Modified:14 Jan 2021 22:54

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