Ultimate strength of welded aluminium stiffened panels under combined biaxial and lateral loads: a numerical investigation

Xintong Wang; Zhaolong Yu; Jørgen Amdahl

doi:10.1016/j.marstruc.2024.103654

Ultimate strength of welded aluminium stiffened panels under combined biaxial and lateral loads: a numerical investigation

Xintong Wang^*, Zhaolong Yu, Jørgen Amdahl

^*Corresponding author for this work

Naval Architecture, Ocean And Marine Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The number and size of aluminium non-monohull ships have been steadily increasing over time. This raises growing concerns regarding their structural strength, especially considering the adverse effects of the heat-affected-zone (HAZ) on welding connections in aluminium structures. This paper investigates the ultimate strength of welded aluminium stiffened panels under combined biaxial compressive loads and lateral pressure through the application of numerical simulations. Altogether 360 cases are simulated with varied panel lengths, welding patterns and load combinations. The results are presented and discussed with respect to force end-shortening curves, failure modes and ultimate strength. Influences of the combined loads and HAZ effects are summarized. The numerical results are compared to two commonly used design methods in the marine industry, the International Association of Classification Societies (IACS) rule and the Panel Ultimate Limit States (PULS) approach. Their applicability to welded aluminium stiffened panels is discussed, and modifications are suggested with respect to the transverse loads, lateral pressure, and HAZ effects.

Original language	English
Article number	103654
Number of pages	27
Journal	Marine Structures
Volume	97
Early online date	12 Jun 2024
DOIs	https://doi.org/10.1016/j.marstruc.2024.103654
Publication status	Published - Sept 2024

Funding

The authors gratefully acknowledge the support from the Research Council of Norway under the Knowledge-Building Project for Industry Robot Welding of Aluminium Ship Hulls [grant number: KPN295138]. Part of this work is also supported by the Centre for Autonomous Marine Operations and Systems (AMOS) [project number: 223254]. The authors would also like to thank the support from high performance computation resources from the Norwegian national e-infrastructures, Project NN9585K - Accidental actions on strait crossings and offshore platforms.

Keywords

aluminium
combined load
HAZ
lateral pressure
ultimate strength
welding

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.marstruc.2024.103654Licence: CC BY 4.0

Wang-etal-MS-2024-Ultimate-strength-of-welded-aluminium-stiffened-panelsFinal published version, 27.2 MBLicence: CC BY 4.0

Cite this

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title = "Ultimate strength of welded aluminium stiffened panels under combined biaxial and lateral loads: a numerical investigation",

abstract = "The number and size of aluminium non-monohull ships have been steadily increasing over time. This raises growing concerns regarding their structural strength, especially considering the adverse effects of the heat-affected-zone (HAZ) on welding connections in aluminium structures. This paper investigates the ultimate strength of welded aluminium stiffened panels under combined biaxial compressive loads and lateral pressure through the application of numerical simulations. Altogether 360 cases are simulated with varied panel lengths, welding patterns and load combinations. The results are presented and discussed with respect to force end-shortening curves, failure modes and ultimate strength. Influences of the combined loads and HAZ effects are summarized. The numerical results are compared to two commonly used design methods in the marine industry, the International Association of Classification Societies (IACS) rule and the Panel Ultimate Limit States (PULS) approach. Their applicability to welded aluminium stiffened panels is discussed, and modifications are suggested with respect to the transverse loads, lateral pressure, and HAZ effects.",

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T2 - a numerical investigation

AU - Wang, Xintong

AU - Yu, Zhaolong

AU - Amdahl, Jørgen

PY - 2024/9

Y1 - 2024/9

N2 - The number and size of aluminium non-monohull ships have been steadily increasing over time. This raises growing concerns regarding their structural strength, especially considering the adverse effects of the heat-affected-zone (HAZ) on welding connections in aluminium structures. This paper investigates the ultimate strength of welded aluminium stiffened panels under combined biaxial compressive loads and lateral pressure through the application of numerical simulations. Altogether 360 cases are simulated with varied panel lengths, welding patterns and load combinations. The results are presented and discussed with respect to force end-shortening curves, failure modes and ultimate strength. Influences of the combined loads and HAZ effects are summarized. The numerical results are compared to two commonly used design methods in the marine industry, the International Association of Classification Societies (IACS) rule and the Panel Ultimate Limit States (PULS) approach. Their applicability to welded aluminium stiffened panels is discussed, and modifications are suggested with respect to the transverse loads, lateral pressure, and HAZ effects.

AB - The number and size of aluminium non-monohull ships have been steadily increasing over time. This raises growing concerns regarding their structural strength, especially considering the adverse effects of the heat-affected-zone (HAZ) on welding connections in aluminium structures. This paper investigates the ultimate strength of welded aluminium stiffened panels under combined biaxial compressive loads and lateral pressure through the application of numerical simulations. Altogether 360 cases are simulated with varied panel lengths, welding patterns and load combinations. The results are presented and discussed with respect to force end-shortening curves, failure modes and ultimate strength. Influences of the combined loads and HAZ effects are summarized. The numerical results are compared to two commonly used design methods in the marine industry, the International Association of Classification Societies (IACS) rule and the Panel Ultimate Limit States (PULS) approach. Their applicability to welded aluminium stiffened panels is discussed, and modifications are suggested with respect to the transverse loads, lateral pressure, and HAZ effects.

KW - aluminium

KW - combined load

KW - HAZ

KW - lateral pressure

KW - ultimate strength

KW - welding

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DO - 10.1016/j.marstruc.2024.103654

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Ultimate strength of welded aluminium stiffened panels under combined biaxial and lateral loads: a numerical investigation

Abstract

Funding

Keywords

UN SDGs

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