Nonlinear finite element analysis of ice-structure interaction at varying strain rates

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:398065

Horrigmoe, G; Andersen, R ^[1]

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1. NORUT Teknologi AS, Narvik (Norway)

The present paper describes results of a comprehensive numerical investigation of ice-structure interaction phenomena using the finite element method. The formulation includes the effects of both material nonlinearities and large deformations. The numerical solution is obtained in a stepwise manner by applying the external loading in finite increments and restoring equilibrium by iterations. The approach described in the present paper is based on viscoplastic constitutive model for ice. In this model the elastic, creep and plastic components of strain are additively combined. As a result, ice forces on structures can be predicted for a broad range of strain rates. The constitutive model which has been developed for general orthotropic (i.e., orthogonal anisotropic) materials, encompasses a variety of creep laws and failure criteria. To check the capabilities of the present formulation, the case of simple ice indentation under plane stress conditions was selected. Results from numerical simulations were obtained for different aspect ratios and for varying indenter velocities.

• OSTI ID: 398065
• Report Number(s): CONF-940409--; ISBN 1-880653-10-9
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ARCTIC REGIONS
DYNAMIC LOADS
FLUID-STRUCTURE INTERACTIONS
ICE
IMPACT STRENGTH
IMPACT TESTS
NUMERICAL ANALYSIS
OFFSHORE PLATFORMS
STRAINS