Coarse-grained model of the J-integral of carbon nanotube reinforced polymer composites
- Authors
- Arash, Behrouz; Park, Harold S.; Rabczuk, Timon
- Issue Date
- 1월-2016
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- CARBON, v.96, pp.1084 - 1092
- Indexed
- SCIE
SCOPUS
- Journal Title
- CARBON
- Volume
- 96
- Start Page
- 1084
- End Page
- 1092
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/90020
- DOI
- 10.1016/j.carbon.2015.10.058
- ISSN
- 0008-6223
- Abstract
- The J-integral is recognized as a fundamental parameter in fracture mechanics that characterizes the inherent resistance of materials to crack growth. However, the conventional methods to calculate the J-integral, which require knowledge of the exact position of a crack tip and the continuum fields around it, are unable to precisely measure the J-integral of polymer composites at the nanoscale. This work aims to propose an effective calculation method based on coarse-grained (CG) simulations for predicting the J-integral of carbon nanotube (CNT)/polymer composites. In the proposed approach, the J-integral is determined from the load displacement curve of a single specimen. The distinguishing feature of the method is the calculation of J-integral without need of information about the crack tip, which makes it applicable to complex polymer systems. The effects of the CNT weight fraction and covalent cross-links between the polymer matrix and nanotubes, and polymer chains on the fracture behavior of the composites are studied in detail. The dependence of the J-integral on the crack length and the size of representative volume element (RVE) is also explored. (C) 2015 Elsevier Ltd. All rights reserved.
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