Comparison and analysis of experimental and virtual laboratory scale punch through tests

A. Polojärvi (Corresponding Author), J. Tuhkuri, Otto Korkalo

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)

Abstract

Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.
Original languageEnglish
Pages (from-to)11-25
Number of pages14
JournalCold Regions Science and Technology
Volume81
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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friction
plastic
Friction
Plastics
experiment
Experiments
Numerical models
Video cameras
Piles
simulation
Ice
pile
penetration
test
comparison
laboratory
analysis
software
ice
basin

Keywords

  • Discrete element method
  • ice rubble
  • model scale experiments
  • numerical modelling
  • punch through tests

Cite this

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title = "Comparison and analysis of experimental and virtual laboratory scale punch through tests",
abstract = "Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.",
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Comparison and analysis of experimental and virtual laboratory scale punch through tests. / Polojärvi, A. (Corresponding Author); Tuhkuri, J.; Korkalo, Otto.

In: Cold Regions Science and Technology, Vol. 81, 2012, p. 11-25.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Comparison and analysis of experimental and virtual laboratory scale punch through tests

AU - Polojärvi, A.

AU - Tuhkuri, J.

AU - Korkalo, Otto

PY - 2012

Y1 - 2012

N2 - Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.

AB - Laboratory scale punch through tests on floating rubble consisting of plastic blocks were conducted and simulated with a 3D discrete numerical model. The purpose was to analyse the experimental method and to validate the model. The motivation of using plastic blocks instead of ice was to simplify the interpretation of results as the plastic blocks do not freeze together. The indentor force and the lateral force induced by the rubble on one of the basin walls were recorded as a function of indentor penetration. Further, the experiments were recorded with a video camera and a motion tracking software was used to analyse the rubble deformation. The force records and deformation patterns from the experiments and simulations were in agreement. The evolution of the deformation patterns could be closely linked to the indentor force records, which demonstrates the need for the numerical model to correctly represent the rubble deformation. The experiments and the simulations showed, that the lateral force within the pile increased considerably during a punch through experiment. This makes the interpretation of punch through experiment results for material modelling challenging: the friction angle of the rubble can become overestimated making the punch through test unsuitable for achieving accurate values for friction angle. Consequently, no value for the rubble friction angle was derived here.

KW - Discrete element method

KW - ice rubble

KW - model scale experiments

KW - numerical modelling

KW - punch through tests

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DO - 10.1016/j.coldregions.2012.04.008

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JO - Cold Regions Science and Technology

JF - Cold Regions Science and Technology

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