The Influence of Weld Joints on the Failure Mechanism of Scaled Double Hull Structures under Collision Load in Finite Element Simulations

Werner, Benjamin; Daske, Christoph; Heyer, Horst; Sander, Manuela; Schöttelndreyer, M; Fricke, Wolfgang

doi:10.1016/j.mspro.2014.06.053

Cited by 5 publications

(8 citation statements)

References 8 publications

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“…The RTCL failure criterion is applied for both numerical analyses. The force-displacement curve of the experiment with PVPS is reproduced with greater correlation by the finite element simulation with the analogous model of weld joints, an observation already reported by Werner et al [23]. For that reason, all following numerical investigations are performed with the analogous model of weld joints, which will be studied in greater detail.…”

Section: Influence Of the Weld Jointssupporting

confidence: 66%

“…Large-scale specimen consisting out of support construction and the double hull structure[23]. Force-displacement curves of the collision experiments with and without PVPS.…”

mentioning

confidence: 99%

“…Schematic illustration of the location of crack initiation in the large-scale specimen of the collision experiment with PVPS[23].…”

mentioning

confidence: 99%

“…Analogous model for discretizing weld joints in the large-scale specimens[23]. Furthermore, these elements are assigned the material behavior of the weld metal as determined by the compression tests with the equations according to Voce and Swift.…”

mentioning

confidence: 99%

“…Force-displacement curve of the collision experiment with PVPS along with the force-displacement curves of the numerical analyses using the RTCL failure criterion with and without weld elements[23]. Force-displacement curve of the collision experiment with PVPS along with the force-displacement curves of the numerical analyses using RTCL and Lou-Kõrgesaar-Romanoff failure criteria.…”

mentioning

confidence: 99%

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Numerical investigations of collision experiments considering weld joints

Werner

Heyer

Sander

2015

Engineering Failure Analysis

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Section: Influence Of the Weld Jointssupporting

confidence: 66%

“…Large-scale specimen consisting out of support construction and the double hull structure[23]. Force-displacement curves of the collision experiments with and without PVPS.…”

mentioning

confidence: 99%

“…Schematic illustration of the location of crack initiation in the large-scale specimen of the collision experiment with PVPS[23].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Numerical investigations of collision experiments considering weld joints

Werner

Heyer

Sander

2015

Engineering Failure Analysis

Self Cite

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Emerging Challenges for Numerical Simulations of Quasi-Static Collision Experiments on Laser-Welded Thin-Walled Steel Structures

Romanoff

Körgesaar

Remes

2020

J. Marine. Sci. Appl.

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This paper re-evaluates recently published quasi-static tests on laser-welded thin-walled steel structures in order to discuss the fundamental challenges in collision simulations based on finite element analysis. Clamped square panels were considered, with spherical indenter positioned at the mid-span of the stiffeners and moved along this centerline in order to change the load-carrying mechanism of the panels. Furthermore, the use of panels with single-sided flat bar stiffening and web-core sandwich panels enabled the investigation of the effect of structural topology on structural behavior and strength. The changes in loading position and panel topology resulted in different loading, structural and material gradients. In web-core panels, these three gradients occur at the same locations making the panel global responses sensitive for statistical variations and the failure process time-dependent. In stiffened panel with reduced structural gradient, this sensitivity and time-dependency in failure process is not observed. These observations set challenges to numerical simulations due to spatial and temporal discretization as well as the observed microrotation, which is beyond the currently used assumptions of classical continuum mechanics. Therefore, finally, we discuss the potential of non-classical continuum mechanics as remedy to deal with these phenomena and provide a base for necessary development for future.

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Discrete element simulation of the breakage behavior of porous granules utilizing bond models

2023

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In the development of ships, the aspect of collision safety plays a major role. In this paper, the approach to improve the crashworthiness of ships is to fill the already existing double hull with a granular material. For this purpose, the material used is to be investigated numerically. A discrete element approach is applied for this in the paper presented. Since the breakage behavior of the particles is of particular interest, the discrete element method is used together with a bonded particle method. This approach is extended by a model which is able to take into account the micro-cracks occurring in the material and the energy dissipation caused by them. Using this and other models of the bonded particle method, simulations are carried out and compared with corresponding experiments. A particular focus is on uniaxial compression tests with single particles and particle systems. The single-particle tests are used to determine various simulation parameters relevant to individual particles in terms of geometry and material. In addition, the multi-particle tests provide insight into the behavior of several particles, their interaction and dynamics. These simulations can be used to test the extent to which it is possible to represent porous particles and their fracture behavior by numerical means.

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The Influence of Weld Joints on the Failure Mechanism of Scaled Double Hull Structures under Collision Load in Finite Element Simulations

Cited by 5 publications

References 8 publications

Numerical investigations of collision experiments considering weld joints

Numerical investigations of collision experiments considering weld joints

Emerging Challenges for Numerical Simulations of Quasi-Static Collision Experiments on Laser-Welded Thin-Walled Steel Structures

Discrete element simulation of the breakage behavior of porous granules utilizing bond models

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