• Kolari, Kari
• Kuutti, Juha

Abstract

The numerical modeling of continuous failure process inice-structure interaction FE-analyses isa big challenge. Conventional methods such as elementerosion to model crack propagation ormaterial failure are not satisfactory in modeling truefailure process of brittle material. Usingmore sophisticated approach to failure modeling,numerical analysis is able to take accountexplicit material failure and analysis can be continuedafter crack propagation without violatingbalance laws of mechanics.An advanced approach for the modeling of ice-structureinteraction is presented in this paper. Inthe proposed approach material behavior and brittlefailure is modeled using continuum damagemechanics (CDM). Crack propagation path prediction isobtained from the CDM model and amodel update technique is utilized to propagate the crackexplicitly in the mesh. Explicit cracksare created in the mesh by splitting the damaged elementsbased on the internal crack born insidethe element. The crack propagation process is modeled bydividing the analysis into segmentsand updating the model between the segments. Materialfailure controls the segments so thatmodel is updated after each crack propagation segment.This approach allows analysiscontinuation after complete failure and the creation ofseparate segments yielding to e.g. materialseparation or pileup. In this paper a laboratory-scaleice block crushing experiment is simulatedusing the presented approach.

Topics

• impedance spectroscopy
• experiment
• simulation
• crack