Longitudinal bending characteristics and design requirements of composite material superstructures

XIA Yi; LI Huadong; MEI Zhiyuan

doi:10.19693/j.issn.1673-3185.02471

Volume 18 Issue 2

Apr. 2023

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Chinese Journal of Ship Research > 2023 > 18(2): 74-80. > DOI: 10.19693/j.issn.1673-3185.02471 CSTR: 32390.14.j.issn.1673-3185.02471

XIA Y, LI H D, MEI Z Y. Longitudinal bending characteristics and design requirements of composite material superstructures[J]. Chinese Journal of Ship Research, 2023, 18(2): 74–80. DOI: 10.19693/j.issn.1673-3185.02471

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Longitudinal bending characteristics and design requirements of composite material superstructures

XIA Yi^{1, 2},
LI Huadong¹,
MEI Zhiyuan^1,

1.
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China
2.
The 92728 Unit of PLA, Shanghai 200442, China

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Received Date: July 29, 2021
Revised Date: September 01, 2021
Official website online publication date: September 05, 2021

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.

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Abstract

Objective To tackle the problem of the longitudinal strength of composite superstructures, the finite element analysis method is used to study their longitudinal bending characteristics and design requirements.
Method First, an analysis is made of the longitudinal strain distribution along the height direction of a simplified hull model with different lengths and the equivalent elastic moduli of superstructure materials, and the quadratic function is used to perform nonlinear fitting. Second, the design requirements of composite superstructures are proposed based on the fitting results and explained in terms of both structural size and material properties. Finally, based on the concept of bending moment effectiveness and national military standards, a superstructure method with different elastic moduli and lengths is proposed that fully participates in longitudinal bending determination.
Results The results show that glass fiber and carbon fiber reinforced plastic reach the longitudinal strength requirements of superstructures, and composite superstructures longer than 0.3 times the length of the hull should be included in section stiffness checks.
Conclusion The results of this study can provide references for the future design of naval ships with composite materials.
- composite materials,
- superstructures,
- longitudinal bending,
- effectiveness

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