An ice material model for assessment of strain rate, temperature and confining pressure effects using finite element method
Paper i proceeding, 2018

This paper addresses an investigation of ice constitutive laws modelling with strain rate, temperature and confining pressure effects to simulate the dynamic ice loads on ships and marine structures. For the proposed phenomenological model consisting of elastic, delayed elastic and viscous components, strain rate is taken into account by introducing a viscous term based on Glen’s law, and the compressive strength under different strain rates is analyzed. The effects of temperature and confining pressure are also included in the ice model. With the consideration that the viscous term and delayed elastic term are affected by temperature, the pressure hardening and pressure softening phenomena are embedded in the constitutive model. The proposed three-dimensional constitutive model is implemented in explicit LS-DYNA as a user-defined material model, and the numerical simulations are conducted to verify the proposed ice material model. Constant strain rate experiments and creep experiments using cylindrical ice specimens are selected for case studies. From which, ice strength and strain-time curves at different strain rates, temperatures and confining pressures are obtained and compared with experimental results.

ice constitutive material model

Confining pressure

strain rate effect

temperature

finite element method

Författare

Ying Xu

Shanghai Jiao Tong University

ZhiQiang Hu

Newcastle University

Jonas Ringsberg

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Gang Chen

Shanghai Jiao Tong University

Xiangyin Meng

Newcastle University

Proceedings of The 3rd International Conference on Ships and Offshore Structures (ICSOS 2018)

1-15 ICSOS2018-018

The 3rd International Conference on Ships and Offshore Structures (ICSOS 2018)
Gothenburg, Sweden,

Chalmers styrkeområde Transport – finansiering 2018

Chalmers, 2018-01-01 -- 2018-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Teknisk mekanik

Annan materialteknik

Fundament

Grundläggande vetenskaper

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Senast uppdaterat

2018-10-11