说明分析pfc2d 3d中模型david potyondy modelinpfc4.pptx

下载文档

0
0
约7.23千字
约 17页
2024-08-30 发布于北京
举报
版权申诉
保障服务

说明分析pfc2d 3d中模型david potyondy modelinpfc4.pptx

1、本文档共17页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

PSCModel

inPFC2D/3D4.0DavidPotyondyFebruary7,2014

EssentialFeaturesofaBPMbrokenbondsextensionfractureemanatingfromvoidmaterialhasunloadedloadcarriedinuncrackedmaterialheterogeneousforcetransmissioninducesmicrotension1m(100grains)Potyondy,D.O.“TheBonded-ParticleModelasaToolforRockMechanicsResearchandApplication:CurrentTrendsandFutureDirections,”keynotepaperinThePresentandFutureofRockEngineering(Proceedingsof7thAsianRockMechanicsSymposium—ARMS7,Seoul,Korea,15–19October,2012).

TwoComplementaryIdealizationsofRockBPMmaterial(cementedgranularmaterial)LEFMmaterial(linear-elasticbodywithinitialpopulationofcracks)MicrostructuralmechanismstoinducemicrotensionandbondbreakageMicrostructuralmechanismtoinducemicrotensionandcrackextensionviaslidingcrackwingcracks

TwoComplementaryIdealizationsofRockWhydoesaxialsplittingoccur?Itoriginatesfromlocaltransversetensilestressesatflawsorheterogeneitiesintherock.Forbothmaterials,theaxialsplitsnucleateaswingcracksinLEFMmaterialasbrokenbondsinBPMmaterialandthengrowintoanorientationparalleltodirectionofcompressionaslengtheningcracksinLEFMmaterialasadditionalbrokenbondsthatcoalesceintoextensionfracturesinBPMmaterial

TwoComplementaryIdealizationsofRockBPMmaterialSupportsmicrocracknucleationaswellasgrowthandeventualinteractionProvidesrichsetofgrain-scalediscontinuitiesthatcanberelatedtomicrostructuralfeaturesGrain-scalediscontinuitiesneednotbemappedintoinitialpopulationofcrackssandstonewithbroadgrainsuturesmarblewithinterlockinggrains

Parallel-bondedStressCorrosion(PSC)model,PSCmodelPotyondy,D.O.(2007)“SimulatingStressCorrosionwithaBonded-ParticleModelforRock,”Int.J.RockMech.Min.Sci.,44(5),677–691.Themodelisoperativeatthegrainscale,andiscapturingtheeffectofmicrotensionsactivatingadamageprocess.fa