Comparative studies of fracture models for marine structural steels

Choung, Joonmo

doi:10.1016/j.oceaneng.2009.08.003

Cited by 28 publications

(18 citation statements)

References 11 publications

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“…The latest trend in failure analysis development is the uniication of analysis methods and procedures [22][23][24], in order to obtain a comprehensive procedure of structural failure analysis that would cover main failure modes and enable a safer and more eicient design, manufacture and maintenance processes.…”

Section: Failure Analysis and Preventionmentioning

confidence: 99%

Common Case Studies of Marine Structural Failures

Vukelić¹,

Vizentin²

2017

Failure Analysis and Prevention

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Marine structures are designed with a requirement to have reasonably long and safe operational life with a risk of catastrophic failures reduced to the minimum. Still, in a constant wish for reduced weight structures that can withstand increased loads, failures occur due to one or several following causes: excessive force and/or temperature induced elastic deformation, yielding, fatigue, corrosion, creep, etc. Therefore, it is important to identify threats afecting the integrity of marine structures. In order to understand the causes of failures, structure's load response, failure process, possible consequences and methods to cope with and prevent failures, probably the most suitable way would be reviewing case studies of common failures. Roughly, marine structural failures can be divided into structural failures of ships, propulsion system failures, ofshore structural failure, and marine equipment failures. This book chapter will provide an overview of such failures taking into account failure mechanisms, tools used for failure analysis and critical review of possible improvements in failure analysis techniques.

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Section: Failure Analysis and Preventionmentioning

confidence: 99%

Common Case Studies of Marine Structural Failures

Vukelić¹,

Vizentin²

2017

Failure Analysis and Prevention

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“…This is the main disadvantage when applying the GTN yield potential and failure porosity criterion. In marine engineering, the first reported application of this model was by Choung [10,11] who considered in detail the aforementioned material constants.…”

Section: Failure Porosity Criterionmentioning

confidence: 99%

“…Choung [10] demonstrated that the linear damage evolution law is not suitable for the quantitative prediction of large strain problems of marine structural steels. It is impossible to use the nonlinear damage evolution law unless an extra user-defined subroutine is implemented in a commercial FE code.…”

Section: Critical Damage Failure Criterionmentioning

confidence: 99%

“…BWH is very similar to the FLD criterion. Choung [10] simulated fracture with tensile tests using two failure models: critical damage of CDM and failure porosity based on a porous plasticity yield potential. From wedge impact tests and simulations, he proved that failure porosity might be good criterion for fracture estimation of marine structural steel [11].…”

Section: Introductionmentioning

confidence: 99%

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Estimation of failure strain of EH36 high strength marine structural steel using average stress triaxiality

Choung

Song

2012

Marine Structures

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“…강재의 경우 극저온에서의 취성을 제외하면 저온에서도 연성 재료 (ductile material)로 간주할 수 있고, 따라서 von Mises 항 복조건의 적용이 가능하며, 통상 소성 변형률이 임계치에 도달했 을 때 파괴 (fracture 또는 failure)가 발생하는 것으로 간주할 수 있다 (Choung, 2009). 또한 동하중에 대하여 변형률 속도 구성 방정식을 적용하면 동적 경화능을 쉽게 구현이 가능하다 (Choung, et al, 2010).…”

Section: 서 론unclassified

Comparative Study on Material Constitutive Models of Ice

Choung¹,

Nam²,

Kim³

2011

Journal of the Society of Naval Architects of Korea

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To define ice as a solid material, mathematical and physical characteristics and their application examples are investigated for several materials' yield functions which include isotropic elastic, isotropic elastic-plastic, classical Drucker-Prager, Drucker-Prager Cap, Heinonen's elliptic, Derradji-Aouat's elliptic, and crushable foam models. Taking into account brittle failure mode of ice subject to high loading rate or extremely low temperature, isotropic elastic model can be better practicable than isotropic elastic-plastic model. If a failure criterion can be properly determined, the elastic model will provide relatively practicable impact force history from ice-hull interactions. On the other hand, it is thought that the soil models can better predict the ice spalling mechanism, since they contain both terms of shear stress-induced and hydrostatic stress-induced failures in the yield function. (Choung, et al., 2010).

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Comparative studies of fracture models for marine structural steels

Cited by 28 publications

References 11 publications

Common Case Studies of Marine Structural Failures

Common Case Studies of Marine Structural Failures

Estimation of failure strain of EH36 high strength marine structural steel using average stress triaxiality

Comparative Study on Material Constitutive Models of Ice

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