Comparative investigation on ultimate strength of hull girder with laser-welded web-core sandwich deck

Guang-ming, WU; Han, Zhengjun; Wang, Deyu

doi:10.1016/j.oceaneng.2022.112483

Cited by 1 publication

(2 citation statements)

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“…Recent research indicates that the influence of welding residual stresses with an average value on the ultimate strength of structures is relatively limited [41]. The energy concentration in laser welding far surpasses that found in conventional welding techniques like flame cutting and fusion welding, and the heat-affected zone is relatively small [29]. By utilizing laser welding, the focused energy of the laser beam is harnessed to rapidly vaporize the material undergoing the welding process.…”

Section: Initial Imperfectionsmentioning

confidence: 99%

“…This investigation took into account the influence of initial deflections, boundary conditions, and the stiffness associated with the rotation of the laser weld [28]. In the work conducted by Zhong et al [29], an investigation was conducted on the ultimate strength and collapse behaviour of the hull girder, considering the presence of an upper sandwich deck and its exposure to vertical bending, horizontal bending, torsion, and combinations of these loads. Through numerical analyses, the study successfully established and rigorously validated the correlations between the ultimate strength and interactions for hull girders subjected to combined two moments or combined three moments.…”

Section: Introductionmentioning

confidence: 99%

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Ultimate Strength Behaviour and Optimization of Laser-Welded Web-Core Sandwich Panels under In-Plane Compression

Elsaka,

Guedes Soares

2023

JMSE

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In pursuit of more efficient load-bearing solutions for ship deck panels of Very Large Crude Carriers exposed to vertical hull girder bending forces, laser-welded web-core sandwich panels are considered as an alternative to conventional stiffened panels. The primary goal is to identify a lighter steel sandwich structure capable of matching the ultimate strength of conventional counterparts. Utilizing non-linear finite element analysis, the ultimate strength of conventional decks subjected to uniaxial compression is assessed. Attention is then shifted to laser-welded sandwich panels, with a detailed examination of how various design parameters influence their performance. Specifically, four key design aspects of unidirectional vertical webs, including face thickness, web thickness, web height, and web spacing, are optimized to strike a balance between weight and strength through structural optimization techniques combined with the response surface method. Ultimately, a comparison is drawn between the ultimate strength of these innovative steel sandwich panels and their conventional, stiffened counterparts. The findings reveal that web-core sandwich panels, when employed as an alternative, result in a notable reduction in hull weight, thereby showcasing the potential for a more efficient and sustainable approach in the maritime industry.

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Section: Initial Imperfectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%