Journal
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Volume 191, Issue -, Pages 486-496Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2020.01.001
Keywords
S-shaped fissure; 3D printing; Failure behavior; Uniaxial tension; Numerical simulation
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Funding
- National Natural Science Foundation of China [51808185]
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The behavior and mechanism of crack initiation and coalescence of S-shaped fissure are investigated in the study to shed more light on the failure characteristics of non-straight fissures. The uniaxial tensile tests with 3D-printed samples and numerical simulations are carried out to study the influence of different geometric parameters of S-shaped fissure, including the inclination angle beta and effective curvature A/c. The crack coalescence of an S-shaped fissure is observed to occur exclusively through tensile cracks, while the tip cracking and non-tip cracking patterns of S-shaped fissures can be identified based on the crack initiation position. It is found that the inclination angle and effective curvature have a substantial influence on the failure mode of the S-shaped fissure. Based on experimental results, extensive numerical simulations are performed to predict the cracking patterns, e.g., tip cracking/non-tip cracking. A reasonably effective, quick criteria approach for identifying the coalescence patterns in terms of parameters A/c-beta for S-shaped fissures under uniaxial tension is derived based on vast numerical calculations. The current study yields a favorable demonstration of the application of 3D printing technology in adept arbitrary geometry formation. (C) 2020 Published by Elsevier Ltd.
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