Steel and Composite Structures

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A novel coupled finite element method for hydroelastic analysis of FG-CNTRC floating plates under moving loads

  • Nguyen, Vu X. (Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT)) ;
  • Lieu, Qui X. (Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT)) ;
  • Le, Tuan A. (Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT)) ;
  • Nguyen, Thao D. (Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT)) ;
  • Suzuki, Takayuki (Department of Civil Engineering, Yokohama National University) ;
  • Luong, Van Hai (Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT))
  • Received : 2021.05.01
  • Accepted : 2021.11.26
  • Published : 2022.01.25
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Abstract

A coupled finite element method (FEM)-boundary element method (BEM) for analyzing the hydroelastic response of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) floating plates under moving loads is firstly introduced in this article. For that aim, the plate displacement field is described utilizing a generalized shear deformation theory (GSDT)-based FEM, meanwhile the linear water-wave theory (LWWT)-relied BEM is employed for the fluid hydrodynamic modeling. Both computational domains of the plate and fluid are coincidentally discretized into 4-node Hermite elements. Accordingly, the C1-continuous plate element model can be simply captured owing to the inherent feature of third-order Hermite polynomials. In addition, this model is also completely free from shear correction factors, although the shear deformation effects are still taken into account. While the fluid BEM can easily handle the free surface with a lower computational effort due to its boundary integral performance. Material properties through the plate thickness follow four specific CNT distributions. Outcomes gained by the present FEM-BEM are compared with those of previously released papers including analytical solutions and experimental data to validate its reliability. In addition, the influences of CNT volume fraction, different CNT configurations, water depth, and load speed on the hydroelastic behavior of FG-CNTRC plates are also examined.

Keywords

Acknowledgement

This research is funded by Japan International Cooperation Agency Project for ASEAN University Network/Southeast Asia Engineering Education Development Network (JICA Project for AUN/SEED-Net) in the framework of Collaborative Education Program (CEP) under Program Contract No. HCMUT CEP 2101.

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