Reduction of Overwelding and Distortion for Naval Surface Combatants. Part 2: Weld Sizing Effects on Shear and Fatigue Performance

Huang, T. D.; Harbison, Michael; Kvidahl, L.; Niolet, David; Walks, John; Christein, J. P.; Smitherman, Mark; Phillippi, Mark; Dong, Ping; DeCan, Larry; Caccese, Vincent; Blomquist, Paul A.; Kihl, David P.; Wong, Rick; Sinfield, Matthew; Nappi, Natale S.; Gardner, James E.; Wong, Catherine C. L.; Bjornson, Michael; Manuel, Allen

doi:10.5957/jspd.32.1.140024

Cited by 4 publications

(1 citation statement)

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“…This process is time consuming, can damage the structure if done too aggressively, and often damages machinery and equipment pre‐outfitted to the structure. Past work has shown that such errors at assembly or grand block integration results in significant cost during shipbuilding . An inexpensive strain sensing technique such as SAS could give fabricators real‐time visual feedback to the residual stress state in the structure.…”

Section: Weld Trialmentioning

confidence: 99%

The strain amplification sensor: A 3D-printable stand-alone strain gauge for low-cost monitoring

Groden

Zhang

Collette

2018

Struct Control Health Monit

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Current in situ strain sensing techniques focus on determining accurate, time-histories of strain utilizing fairly complex sensing, compensation, data processing, and powering arrangements. A simpler and lower-cost strain sensing approach would open up more opportunities to use strain measurements to support engineering decision making. This work explores a fully mechanical, ultra-low cost strain sensor printed using additive manufacturing techniques.The accuracy of current additive manufacturing techniques are discussed, and the performance of the sensor in terms of accuracy, measurement repeatability, and batch-to-batch manufacturing variability are studied. An example of using the proposed sensor to measure transient thermal weld stresses is presented.Overall, the key challenge to such a sensor is shown to be the accuracy of pin and slot print features and the resulting slip and friction introduced into the sensor. A properly calibrated design printed with current state-of-the-art machines is shown to be capable of resolving strain changes on the order of one micro strain with good repeatability.

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Section: Weld Trialmentioning

confidence: 99%

The strain amplification sensor: A 3D-printable stand-alone strain gauge for low-cost monitoring

Groden

Zhang

Collette

2018

Struct Control Health Monit

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An Analytical Shear Strength Model for Load-Carrying Fillet-Welded Connections Incorporating Nonlinear Effects

Dong

2020

J. Struct. Eng.

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Through-life hybrid fatigue assessment of naval ships

Magoga

Aksu

Cannon

et al. 2019

Ships and Offshore Structures

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When a ship enters service it has an implied or calculated design fatigue life. Factors including construction quality, loads, material performance, and operational profile are assumed. However, these factors vary through life. Failure of structural items due to fatigue cracking can lead to increased cost of ownership and reduced capability. Therefore, to allow informed decision-making regarding fleet availability and economy, it is necessary to monitor the variables that influence a ship's fatigue life. This paper presents a new method whereby in-service data, fleet maintenance reports, and Finite Element Analysis are incorporated to predict ongoing fatigue life and hence support the management of the remaining service life of a ship. The method is applied to a naval High Speed Light Craft to demonstrate its merit. The fatigue lives of different welded details are predicted using a practical implementation of the S-N curve approach, employed with strain and operational data acquired from an on-board hull monitoring system. The proposed method is efficient because it is properly linked to stress analysis, inherently includes the influence of the operational profile, and is a balance between accuracy and effort.

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Reduction of Overwelding and Distortion for Naval Surface Combatants. Part 2: Weld Sizing Effects on Shear and Fatigue Performance

Cited by 4 publications

References 0 publications

The strain amplification sensor: A 3D-printable stand-alone strain gauge for low-cost monitoring

The strain amplification sensor: A 3D-printable stand-alone strain gauge for low-cost monitoring

An Analytical Shear Strength Model for Load-Carrying Fillet-Welded Connections Incorporating Nonlinear Effects

Through-life hybrid fatigue assessment of naval ships

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