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胶结充填体损伤演化尺寸效应研究.docx

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胶结充填体损伤演化尺寸效应研究 Title:SizeEffectinDamageEvolutionofCementitiousFillingMaterial Abstract: Thestudyofsizeeffectindamageevolutionofcementitiousfillingmaterialisofgreatimportanceforaccuratelypredictingthemechanicalbehaviorandlifespanofstructures.Thispaperaimstoinvestigatetheinfluenceofsampledimensionsonthedamageevolutionofcementitiousfillingmaterial.Severalexperimentalandanalyticalmethodsareemployedtoanalyzethesizeeffectandprovideinsightsintotheunderlyingmechanics.Resultssuggestthatthedamageevolutionincementitiousfillingmaterialisaffectedbythesizeofthespecimen,andthisunderstandingcontributestoenhancingthedurabilityandperformanceofstructures. Introduction: Cementitiousfillingmaterial,widelyusedinvariouscivilengineeringapplications,undergoesacomplexdamageprocessundermechanicalloading,includingcracking,deformation,andfailure.Theevolutionofdamagesignificantlyaffectsthemechanicalbehavioranddurabilityofstructures.However,theeffectofsizeonthedamageevolutionofcementitiousfillingmaterialremainspoorlyunderstood. Methods: Thisstudyutilizesacombinationofexperimentalandanalyticalmethodstoaddressthesizeeffectindamageevolutionofcementitiousfillingmaterial.Experimentaltestsareconductedonspecimenswithvaryingdimensionstoevaluatethemechanicalresponseanddamageevolutionunderdifferentloadingconditions.Additionally,numericalsimulationsandanalyticalmodelsareemployedtogainfurtherinsightsintothemechanicsofdamageevolution. ResultsandDiscussion: Experimentalresultsdemonstratethatthedamageevolutionincementitiousfillingmaterialexhibitsadistinctsizeeffect.Specifically,smallerspecimenstendtoexhibitahigherrateofdamageaccumulationcomparedtolargerones.Thisobservationindicatesthatthedistributionofinternalstressesandstrainssignificantlyaffectstheinitiationandpropagationofcrackswithinthematerial.Furthermore,numericalsimulationsandanalyticalmodelsrevealthatthesizeeffectisassociatedwiththeheterogeneityofthematerialandtheconstrainteffectofsurroundingstructures. Thesizeeffectobservedinthedamageevolutionofcement