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Method of calculating strain for automatic forming of ship bidirectional curvature plate[J]. Chinese Journal of Ship Research. doi: 10.19693/j.issn.1673-3185.02313
Citation: Method of calculating strain for automatic forming of ship bidirectional curvature plate[J]. Chinese Journal of Ship Research. doi: 10.19693/j.issn.1673-3185.02313

Method of calculating strain for automatic forming of ship bidirectional curvature plate

doi: 10.19693/j.issn.1673-3185.02313
  • Received Date: 2021-03-12
    Available Online: 2021-05-26
    © 2021 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] In the research of automatic forming of ship bidirectional curvature plate, the calculation accuracy and efficiency of strain distribution is an important issue. In view of the limitations of the existing methods of calculating strain, a method is proposed to improve the calculation accuracy of the strain distribution of ship bidirectional curvature plate, and the proposed method has high calculation efficiency, which meets the needs of engineering application. [Methods] Taking the circular flat plate as the research object, the secondary development of the subroutine in the finite element software is carried out, and the displacement field load is gradually applied, which improves the calculation accuracy of the strain distribution. Considering that the actual machining process is an elastoplastic deformation process, the influence of material nonlinearity on strain distribution is discussed. From the perspective of calculation accuracy and calculation efficiency, the applicability of various calculation methods is discussed. [Results] The calculation method using subroutine solves the problems of insufficient precision, complex modeling and low calculation efficiency of the existing methods. From the perspective of calculation efficiency, it is recommended to use the elastic large deformation finite element method to calculate the strain. For the target shape with different curvature radii, some reasonable suggestions are given for the selection of calculation methods. [Conclusions] The research results can quickly provide accurate strain distribution for the automatic forming system of the ship bidirectional curvature plate, which has practical engineering application value.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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