Volume 17 Issue 3
Jun.  2022
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NI B Y, XU Y, HUANG Q, et al. Application of improved cohesive zone length formula in ice mode I crack propagation[J]. Chinese Journal of Ship Research, 2022, 17(3): 58–66 doi: 10.19693/j.issn.1673-3185.02701
Citation: NI B Y, XU Y, HUANG Q, et al. Application of improved cohesive zone length formula in ice mode I crack propagation[J]. Chinese Journal of Ship Research, 2022, 17(3): 58–66 doi: 10.19693/j.issn.1673-3185.02701

Application of improved cohesive zone length formula in ice mode I crack propagation

doi: 10.19693/j.issn.1673-3185.02701
  • Received Date: 2021-12-14
  • Rev Recd Date: 2022-04-07
  • Available Online: 2022-05-24
  • Publish Date: 2022-06-30
    © 2022 The Authors. Published by Editorial Office of Chinese Journal of Ship Research. Creative Commons License
    This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  •   Objectives  The cohesive zone length is the sum of the cohesive element length at the failure edge and the lengths of the other cohesive elements connected to it. The cohesive zone length determines the maximum size of the mesh. Therefore, the accurate estimation of cohesive zone length and reasonable mesh division are important factors affecting calculation accuracy.   Methods  Based on several J-integral assumptions and existing research results, a modified function on length thickness ratio value is added to the original formula. The modified formula is then applied to an ice mechanics model. Based on the finite element method, a model of a double cantilever beam is established to verify the accuracy of the formula through comparison with the experimental results.  Results  The results show that there must be at least four cohesive elements in a cohesive zone length to describe the fracture process accurately. This conclusion is also applied to the numerical simulation of a three-point bending experiment. The error of the limit load is 2.9%, and that of the fracture point is within a reasonable range.  Conclusion   It is concluded that the modified cohesive zone length formula is more suitable for ice materials.
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