Numerical Analysis of Ice–Structure Impact: Validating Material Models and Yield Criteria for Prediction of Impact Pressure

Author:

Jang Ho-Sang1,Hwang Seyun1,Yoon Jaedeok2,Lee Jang Hyun3ORCID

Affiliation:

1. Extreme Technology Research Center for Ship and Offshore Platform, Inha University, 100, Inha-Ro, Michuhol-Gu, Incheon 22212, Republic of Korea

2. Graduate School, Inha University, 100, Inha-Ro, Michuhol-Gu, Incheon 22212, Republic of Korea

3. Department of Naval Architecture and Ocean Engineering, Inha University, 100, Inha-Ro, Michuhol-Gu, Incheon 22212, Republic of Korea

Abstract

This study explores the application of numerical analysis and material models to predict ice impact loads on ships and offshore structures operating in polar regions. An explicit finite element analysis (FEA) approach was employed to simulate an ice and steel plate collision experiment conducted in a cold chamber. The pressure and strain history during the ice collision were calculated and compared with the experimental results. Various material model configurations were applied to the FEA to account for the versatile behavior of ice (whether ductile or brittle), its elastic-plastic yield criteria, and its dynamic strain rate dependency. In addition to the standard linear elastic-perfectly plastic and linear elastic-plastic relationships, this study incorporated the Crushable Foam and Drucker–Prager models, based on the specific ice yield criteria. Considering the ice’s strain rate dependency, collision simulations were conducted for each yield criteria model to compute the strain and reaction force of the plate specimens. By comparing the predicted pressures for each material model combination with the pressures from ice collision experiments, our study proposes material models that consider the yielding, damage, and behavioral characteristics of ice. Lastly, our study proposes a combination of ice material properties that can accurately predict collision force.

Funder

Korea Institute for Advancement of Technology

Publisher

MDPI AG

Subject

Ocean Engineering,Water Science and Technology,Civil and Structural Engineering

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