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实时温度与循环载荷作用下花岗岩单轴力学特性实验研究.docx

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实时温度与循环载荷作用下花岗岩单轴力学特性实验研究 【Abstract】 Inthisstudy,aseriesofuniaxialmechanicaltestswereconductedongranitespecimenssubjectedtoreal-timetemperaturevariationandcyclicloading.Thegoalwastoinvestigatethevariationinmechanicalpropertiesofgraniteundertheseconditions. Basedontheexperimentalresults,itwasfoundthatthemechanicalpropertiesofgraniteweregreatlyaffectedbytemperaturevariationandcyclicloading.Specifically,theuniaxialcompressivestrength,elasticmodulus,andPoisson'sratioofgranitedecreasedwithincreasingtemperature,whiletheshearstrengthincreased.Inaddition,repeatedloadingsignificantlyreducedtheuniaxialcompressivestrengthandelasticmodulusofthespecimens. Theresultsofthisstudyprovideimportantinsightsintothebehaviorofgraniteunderreal-worldconditions,whichcanbeusefulinpracticalapplicationssuchasgeotechnicalengineeringandrockmechanics. 【Keywords】Granite,Uniaxialmechanicaltest,Real-timetemperaturevariation,Cyclicloading,Mechanicalproperties 【Introduction】 Graniteisacommonrocktypeingeology,anditisalsowidelyusedinvariousengineeringfieldsduetoitsgoodmechanicalproperties.However,themechanicalpropertiesofgranitemaychangeunderdifferentenvironmentalconditions,suchastemperatureandcyclicloading.Thesefactorscanhaveasignificantimpactonthebehaviorofgraniteingeotechnicalengineeringandrockmechanics.Therefore,itisessentialtostudythevariationinmechanicalpropertiesofgraniteunderreal-worldconditions. Previousstudieshavefocusedonthemechanicalbehaviorsofgraniteunderdifferentstresses,temperatures,andstrainrates.However,fewinvestigationshavebeenconductedontheeffectofreal-timetemperaturechangesandcyclicloadingonthemechanicalpropertiesofgranite.Therefore,thisstudyaimstoprovideinsightsintothebehaviorofgraniteundersuchconditionsthroughuniaxialmechanicaltests. 【ExperimentalMethodology】 Theexperimentalprocedurewasconductedasfollows:first,granitespecimenswerecollectedandmachinedinaccordancewithASTMstandards.Then,thespecimensweredividedintotwogroups:onegroupwassubjectedtoreal-timetemperaturevariation,whiletheoth