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In scientific literature, the identified results of research on special granular
structures,includinginelasticbehaviour,arenotoftenpublished(notincluding
formerworksofauthors).Therefore,thecomparisonofobtainedresultscanbe
dicult. The numerical simulation of the laboratorytests seems to be a good
methodforinitialvalidationofresults.Futureworkrelatedtotheinvestigated
topic will include application of numerical strategies to the identification pro-
cedureofconstitutivemodelsfordiscussedstructures.Forexamplein[24],the
EvolutionaryAlgorithmbasedidentificationmethodhasbeenappliedforsimi-
larproblems.Itenabledauthorstoobtaingoodresultsevenforrelativelylarge
rangeofparametervariation.Theproceduretakesapproximatelyafewminutes
of CPU on a PC computer (depending on the number and the time duration
intervalofthesimulatedcurves)whichseemstobeaseriousadvantageoverpre-
sentedanalyticalmethodologywhichtakesseveralhoursandrequiresadditional
software.
Thepresentedmethodologycanbetreatedasaninitialstepprovidinggeneral
knowledgeaboutthe rangeofB-Pconstitutive equationparameters.A hybrid
approachwhich incorporatesspecific problem oriented knowledge (like a good
estimationofsomematerialconstants,basedontheexperience)isworthbeing
investigated in further studies. In authors opinion, special granular structures
cancompete with otherpopular”smart”materialssuchasMR fluids. A typi-
calexampleofapracticalengineeringapplicationoftheinvestigatedstructures
would be a granular controllable damper used for minimizing risks associated
withearthquakes[25]orapartofabumperminimizingharmfuleffectsresulting
inacollisionbetweenavehicleandpedestrian[26].
References
1. Żółkiewski,S.:Vibrationsofbeamswithavariablecross-sectionfixedonrotational
rigiddisks.LatinAmericanJournalofSolidsandStructures10,39-57(2013)
2. Żółkiewski, S.:Damped Vibrations Problem Of Beams Fixed On The Rotational
Disk.InternationalJournalofBifurcationandChaos21,3033-3041 (2011)
3. Chybowski,L.:QualitativeandQuantitativeMulti-CriteriaModelsoftheImpor-
tanceoftheComponentsinReliabilityStructureofaComplexTechnicalSystem.
JournalofKONBIN4(24),33-48(2012)
4. Brown,E.,Rodenberg,N.,Amend,J.,Mozeika,A.,Steltz,E.,Zakin,M.,Lipson,
H.,Jaeger,H.:Universalroboticgripperbasedonthejammingofgranularmaterial.
ProceedingsoftheNationalAcademyofSciences(PNAS)107,18809-18814(2010)
5. Argon,A.S.:Atheoryforthelowtemperatureplasticdeformationofglassypoly-
mers.Phil.Mag.28,839-865 (1973)
6. Haward,R.N.,Thackray,G.:Theuseofamathematicalmodeltodescribeisother-
mal stress-strain curves in glassy thermoplastics. Proc. Roy. Soc. 302, 453-472
(1968)
7. Wu,P.D.,VanderGiessen,E.:Onneckpropagationinamorphousglassypolymers
underplanestraintension.Int.J.Plast.11,211-235(1995)
8. Arruda,E.M.,Boyce,M.C.,Jayachandran,R.:Effectsofstrainrate,temperature
andthermomechanicalcouplingonthefinitestraindeformationofglassypolymers.
Mech.Mater.19,193-212(1995)
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