Three-dimensional Fracture Analysis of Large Opening Box Girder with Crack Damage under Bending and Torsion Loads

IF 1.3 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme Pub Date : 2023-01-23 DOI:10.1115/1.4056736

Ziya Peng, P. Yang, Yuelin Song, K. Hu

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引用次数: 1

Abstract

This work aims to investigate the complex fracture behavior of large opening box girder (LOBG) adopting three-dimensional (3D) finite element method (FEM). A numerical model is developed to simulate the fracture of LOBG under individually or jointly applied torsion and bending loads. The crack damage is introduced into both the side plate and bottom plate of LOBG. The influencing factors including crack lengths, crack angles, crack locations are also emphatically discussed. Besides, the crack growth angles are also predicted during the analysis. The results present that the large opening can generate significant effects on the crack propagation of the side plate crack (SPC) and bottom plate crack (BPC). Under the condition of torsion or hogging, SPC grows more easily than BPC, while BPC is relatively prone to grow under sagging condition. It is also found that the initial crack angles can obviously lower the stress intensity factor (SIF) under bending condition compared to torsion condition. Additionally, the cracks gradually approaching transverse frame are also more likely to induce mode I fracture under torsion condition. These findings from the present study can reveal insights for better understanding of fracture behavior for LOBG.

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弯曲和扭转荷载作用下具有裂纹损伤的大开口箱梁三维断裂分析

本工作旨在采用三维有限元方法研究大开口箱梁的复杂断裂行为。建立了一个数值模型来模拟LOBG在单独或联合施加扭转和弯曲载荷下的断裂。将裂纹损伤引入LOBG的侧板和底板中。着重讨论了裂纹长度、裂纹角度、裂纹位置等影响因素。此外，在分析过程中还预测了裂纹扩展角。结果表明，大开口对侧板裂纹（SPC）和底板裂纹（BPC）的裂纹扩展有显著影响。在扭转或拱起条件下，SPC比BPC更容易生长，而BPC在下垂条件下相对容易生长。研究还发现，与扭转条件相比，初始裂纹角可以明显降低弯曲条件下的应力强度因子。此外，在扭转条件下，逐渐接近横向框架的裂纹也更有可能诱发I型断裂。本研究的这些发现可以为更好地理解LOBG的骨折行为提供见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme 工程技术-工程：大洋

CiteScore

4.20

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Offshore Mechanics and Arctic Engineering is an international resource for original peer-reviewed research that advances the state of knowledge on all aspects of analysis, design, and technology development in ocean, offshore, arctic, and related fields. Its main goals are to provide a forum for timely and in-depth exchanges of scientific and technical information among researchers and engineers. It emphasizes fundamental research and development studies as well as review articles that offer either retrospective perspectives on well-established topics or exposures to innovative or novel developments. Case histories are not encouraged. The journal also documents significant developments in related fields and major accomplishments of renowned scientists by programming themed issues to record such events. Scope: Offshore Mechanics, Drilling Technology, Fixed and Floating Production Systems; Ocean Engineering, Hydrodynamics, and Ship Motions; Ocean Climate Statistics, Storms, Extremes, and Hurricanes; Structural Mechanics; Safety, Reliability, Risk Assessment, and Uncertainty Quantification; Riser Mechanics, Cable and Mooring Dynamics, Pipeline and Subsea Technology; Materials Engineering, Fatigue, Fracture, Welding Technology, Non-destructive Testing, Inspection Technologies, Corrosion Protection and Control; Fluid-structure Interaction, Computational Fluid Dynamics, Flow and Vortex-Induced Vibrations; Marine and Offshore Geotechnics, Soil Mechanics, Soil-pipeline Interaction; Ocean Renewable Energy; Ocean Space Utilization and Aquaculture Engineering; Petroleum Technology; Polar and Arctic Science and Technology, Ice Mechanics, Arctic Drilling and Exploration, Arctic Structures, Ice-structure and Ship Interaction, Permafrost Engineering, Arctic and Thermal Design.