FATIGUE ANALYSIS OF FILLET WELDED JOINTS USING HOTSPOT STRESS METHOD

5 Pages Posted: 16 May 2023 Last revised: 24 Oct 2023

See all articles by Tasmia Hoque

Tasmia Hoque

Military Institute of Science and Technology

S M Ikhtiar Mahmud

Military Institute of Science and Technology

Date Written: May 10, 2023

Abstract

Due to the repetitive action load, fatigue is an important phenomenon that causes damage failure surrounding the weld at member connections in ship construction. Ships work in a corrosive environment and are subject to complex cyclic load. These loads' primary excitation sources are waves and varied operational profiles. In this study, a cargo hold model is examined utilizing design loads in accordance with the DNV-proposed Fatigue Life Assessment of Ship Structures, and the detail under the regions where stress is concentrated is individually modeled in a fine mesh using the sub-modeling technique. The maximum load that a welded steel structure can withstand and the current design regulation of Eurocode 3 are employed to evaluate the standard load-carrying joints. The hotspot stress approach as per IIW recommendation for fatigue design of welded joints and components is then used to compute the fatigue life of the fillet welded joints identified as high-risk fatigue failure regions of the cargo hold model of the oil tanker and the standard load-carrying joint. Finally, fatigue life between the two cases has been compared.

Keywords: Fatigue, hotspot stress, fillet weld, load carrying joint

Suggested Citation

Hoque, Tasmia and Mahmud, S M Ikhtiar, FATIGUE ANALYSIS OF FILLET WELDED JOINTS USING HOTSPOT STRESS METHOD (May 10, 2023). Proceedings of the 13th International Conference on Marine Technology (MARTEC 2022), Available at SSRN: https://ssrn.com/abstract=4444062 or http://dx.doi.org/10.2139/ssrn.4444062

Tasmia Hoque (Contact Author)

Military Institute of Science and Technology

S M Ikhtiar Mahmud

Military Institute of Science and Technology ( email )

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Downloads
51
Abstract Views
209
Rank
721,287
PlumX Metrics