實芯植物秸稈的力學模型及受壓縮狀態(tài)應力分析研究.pdf

1、中國農(nóng)業(yè)大學碩士學位論文實芯植物秸稈的力學模型及受壓縮狀態(tài)應力分析研究姓名：崔英申請學位級別：碩士專業(yè)：固體力學指導教師：焦群英20050301AbstractIt’sdifferentinphysicalstmcturebetweentheplantstemwithsolidcoreandthatwithoutcoreAndtheformerhasaspecialnodejustlikeaplatewhilethelatterhasa

2、ringlikeoneSotheyhavedefinitelydifferentmechanicalpropertiesSincemoreandmoreplantstemswillbeusedinindustryandagriculture，itsnecessarytostudythemechanicalpropertiesofthemTherearemanyaspectsinstudyingthemechanicalpropertyo

3、fplantstems，suchasthestabilityofbending、antilodgingetcInthisthesis，sugarcanewillbethematerialwediscussInordertostudythepropertiesofmechanicalreactionofsugarcane，wewillputitinatransversecompressionevenlydistributedalongth

4、eaxesofitslengthWecangetthemodelforanalysisthroughstudyingmanydifferentkindsofrealplantstemsThusamedelwithskin、toreandnodeisbuiltFurthermoreallofthecomponentofthemodelareanisotropicIfweusetheelastictheoryandthemechanicso

5、fcompositematerial，averycomplexpartialdifferentialequationsoftwoorderwillbeobtainedAftercomparingthemainmethodinsolvingtheseequations，theauthorchoosefiniteelementmethodasthebestmethodTheparametersofmaterialareveryimporta

6、ntforanalyzingBytensiletestorcompressiontest，mostoftheparameterscanbeattainedSomeparametersaredifficulttomeasure，sowehavetoselectthemaccordingtootherexistedresultsTheleastsquarescriterionisusedintheCHIVeSOthatwecangetamo

7、repreciseresultoftherangeInaddition，thepropertyofthewholesugarcaneisalsotestedforthesakeofcomparisonwithFEMresultTheformoffractureisalsosimplydescribedinthisthesisDuringtheanalysis，somepredigestsforthestructure、restricti

8、onandtheloadshouldbetaken，thuswecangetafairlygoodresultforstress、strainanddisplacementThrougedescribingtheeffectofdifferentparameters、different10ad、differentrestriction、nodeornodelessandthedistanceofthenodewecanfindtheyw

9、ouldhavedifferenteffectontheperformanceofsugarcaneThecodewillbringthemostobviouseffect，andthetransversemodulusofcorearethesecondimponantThethesisgivesausefulreferenceforhowtobuildmodel、toanalyse、tomeasureparameters、andho