A study on the application of hybrid panels to ship structures

Takao Yoshikawa, Yukichi Takaoka, Masahiro Maeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The application of hybrid panels composed of polyurethane foam cores and steel faceplates to hull structures was studied. First, the strength and collapse behavior of the panels were examined using three-point bending tests for hybrid panels with different core densities. Based on the experimental results, low-density core materials, such as those having a density of 300 kg/m3, are recommended for hybrid panels with respect to strength and weight. The structural strength of hybrid panels was investigated through a series of calculations utilizing FEA for beams clamped at both ends under uniform pressure by changing the thickness of the faceplates and core, and the length of the clamped span. Taking account of the structural advantages of hybrid panel structures, two kinds of applications for hybrid panels are proposed. One is in the inner bottom structure of bulk carriers. There is the possibility of improving the residual strength of hybrid panels after they are subjected to severe impacts. The dynamic characteristics of hybrid panels were investigated. It was confirmed that the residual deformation of hybrid structures after impact loading is less than that of ordinary stiffened structures of the same weight. The other application is in the structural members of pressurized LPG (Liquefied Petroleum Gas) tanks. In utilizing hybrid panels in LPG tanks, the difference in rigidity between the core and skin produces a high peak bending stress in the vicinity of the clamped ends. In this paper, measures for the mitigation of this phenomenon are proposed. Also, the difference in rigidity between core and skin also produces weak points in hybrid panels such as the interface between the core and skin-plate. The applicability of hybrid panels in tank systems was examined by numerical methods utilizing the experimental results and it was confirmed that the shear and peel strength of the interface is more than sufficient.

Original languageEnglish
Title of host publicationStructures, Safety and Reliability
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume4A
ISBN (Electronic)9780791845424
DOIs
Publication statusPublished - 2014
EventASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014 - San Francisco, United States
Duration: Jun 8 2014Jun 13 2014

Other

OtherASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014
CountryUnited States
CitySan Francisco
Period6/8/146/13/14

Fingerprint

Skin
Ships
Liquefied petroleum gas
Rigidity
Structural members
Bending tests
Polyurethanes
Foams
Numerical methods
Finite element method
Steel

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

Cite this

Yoshikawa, T., Takaoka, Y., & Maeda, M. (2014). A study on the application of hybrid panels to ship structures. In Structures, Safety and Reliability (Vol. 4A). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2014-23762

A study on the application of hybrid panels to ship structures. / Yoshikawa, Takao; Takaoka, Yukichi; Maeda, Masahiro.

Structures, Safety and Reliability. Vol. 4A American Society of Mechanical Engineers (ASME), 2014.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yoshikawa, T, Takaoka, Y & Maeda, M 2014, A study on the application of hybrid panels to ship structures. in Structures, Safety and Reliability. vol. 4A, American Society of Mechanical Engineers (ASME), ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014, San Francisco, United States, 6/8/14. https://doi.org/10.1115/OMAE2014-23762
Yoshikawa T, Takaoka Y, Maeda M. A study on the application of hybrid panels to ship structures. In Structures, Safety and Reliability. Vol. 4A. American Society of Mechanical Engineers (ASME). 2014 https://doi.org/10.1115/OMAE2014-23762
Yoshikawa, Takao ; Takaoka, Yukichi ; Maeda, Masahiro. / A study on the application of hybrid panels to ship structures. Structures, Safety and Reliability. Vol. 4A American Society of Mechanical Engineers (ASME), 2014.
@inproceedings{786dc1537f254500b40f1cf39857345d,
title = "A study on the application of hybrid panels to ship structures",
abstract = "The application of hybrid panels composed of polyurethane foam cores and steel faceplates to hull structures was studied. First, the strength and collapse behavior of the panels were examined using three-point bending tests for hybrid panels with different core densities. Based on the experimental results, low-density core materials, such as those having a density of 300 kg/m3, are recommended for hybrid panels with respect to strength and weight. The structural strength of hybrid panels was investigated through a series of calculations utilizing FEA for beams clamped at both ends under uniform pressure by changing the thickness of the faceplates and core, and the length of the clamped span. Taking account of the structural advantages of hybrid panel structures, two kinds of applications for hybrid panels are proposed. One is in the inner bottom structure of bulk carriers. There is the possibility of improving the residual strength of hybrid panels after they are subjected to severe impacts. The dynamic characteristics of hybrid panels were investigated. It was confirmed that the residual deformation of hybrid structures after impact loading is less than that of ordinary stiffened structures of the same weight. The other application is in the structural members of pressurized LPG (Liquefied Petroleum Gas) tanks. In utilizing hybrid panels in LPG tanks, the difference in rigidity between the core and skin produces a high peak bending stress in the vicinity of the clamped ends. In this paper, measures for the mitigation of this phenomenon are proposed. Also, the difference in rigidity between core and skin also produces weak points in hybrid panels such as the interface between the core and skin-plate. The applicability of hybrid panels in tank systems was examined by numerical methods utilizing the experimental results and it was confirmed that the shear and peel strength of the interface is more than sufficient.",
author = "Takao Yoshikawa and Yukichi Takaoka and Masahiro Maeda",
year = "2014",
doi = "10.1115/OMAE2014-23762",
language = "English",
volume = "4A",
booktitle = "Structures, Safety and Reliability",
publisher = "American Society of Mechanical Engineers (ASME)",

}

TY - GEN

T1 - A study on the application of hybrid panels to ship structures

AU - Yoshikawa, Takao

AU - Takaoka, Yukichi

AU - Maeda, Masahiro

PY - 2014

Y1 - 2014

N2 - The application of hybrid panels composed of polyurethane foam cores and steel faceplates to hull structures was studied. First, the strength and collapse behavior of the panels were examined using three-point bending tests for hybrid panels with different core densities. Based on the experimental results, low-density core materials, such as those having a density of 300 kg/m3, are recommended for hybrid panels with respect to strength and weight. The structural strength of hybrid panels was investigated through a series of calculations utilizing FEA for beams clamped at both ends under uniform pressure by changing the thickness of the faceplates and core, and the length of the clamped span. Taking account of the structural advantages of hybrid panel structures, two kinds of applications for hybrid panels are proposed. One is in the inner bottom structure of bulk carriers. There is the possibility of improving the residual strength of hybrid panels after they are subjected to severe impacts. The dynamic characteristics of hybrid panels were investigated. It was confirmed that the residual deformation of hybrid structures after impact loading is less than that of ordinary stiffened structures of the same weight. The other application is in the structural members of pressurized LPG (Liquefied Petroleum Gas) tanks. In utilizing hybrid panels in LPG tanks, the difference in rigidity between the core and skin produces a high peak bending stress in the vicinity of the clamped ends. In this paper, measures for the mitigation of this phenomenon are proposed. Also, the difference in rigidity between core and skin also produces weak points in hybrid panels such as the interface between the core and skin-plate. The applicability of hybrid panels in tank systems was examined by numerical methods utilizing the experimental results and it was confirmed that the shear and peel strength of the interface is more than sufficient.

AB - The application of hybrid panels composed of polyurethane foam cores and steel faceplates to hull structures was studied. First, the strength and collapse behavior of the panels were examined using three-point bending tests for hybrid panels with different core densities. Based on the experimental results, low-density core materials, such as those having a density of 300 kg/m3, are recommended for hybrid panels with respect to strength and weight. The structural strength of hybrid panels was investigated through a series of calculations utilizing FEA for beams clamped at both ends under uniform pressure by changing the thickness of the faceplates and core, and the length of the clamped span. Taking account of the structural advantages of hybrid panel structures, two kinds of applications for hybrid panels are proposed. One is in the inner bottom structure of bulk carriers. There is the possibility of improving the residual strength of hybrid panels after they are subjected to severe impacts. The dynamic characteristics of hybrid panels were investigated. It was confirmed that the residual deformation of hybrid structures after impact loading is less than that of ordinary stiffened structures of the same weight. The other application is in the structural members of pressurized LPG (Liquefied Petroleum Gas) tanks. In utilizing hybrid panels in LPG tanks, the difference in rigidity between the core and skin produces a high peak bending stress in the vicinity of the clamped ends. In this paper, measures for the mitigation of this phenomenon are proposed. Also, the difference in rigidity between core and skin also produces weak points in hybrid panels such as the interface between the core and skin-plate. The applicability of hybrid panels in tank systems was examined by numerical methods utilizing the experimental results and it was confirmed that the shear and peel strength of the interface is more than sufficient.

UR - http://www.scopus.com/inward/record.url?scp=84910677530&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84910677530&partnerID=8YFLogxK

U2 - 10.1115/OMAE2014-23762

DO - 10.1115/OMAE2014-23762

M3 - Conference contribution

AN - SCOPUS:84910677530

VL - 4A

BT - Structures, Safety and Reliability

PB - American Society of Mechanical Engineers (ASME)

ER -