機織復合材料三維造型與可視化研究.pdf

1、天津工業(yè)大學碩士學位論文機織復合材料三維造型與可視化研究姓名：李姜申請學位級別：碩士專業(yè)：紡織工程指導教師：黃故20081201ABSTRACTFiniteelementanalysis(FEM)isregardedasaneffectiveapproachtostudyonmechanicalpropertiesofcompositesAstheforepartprocessingofFEMmeshpartitioniSakeyste

2、pInordertoobtainreasonableandeffectivemeshes，material，SsubstructuremustbeanalyzedanditssolidmodelmustbeconstructedThereiSnodoubtthatmodellingiSFEM’sfoundation’SfoundationTodayFEMisfindingincreasinglyapplicationsinallover

3、thefields，andmodelling’SimportanceisgrowingdaybydayBasedonmaterial’Ssubstructure。thepaperstudiessolidmodellingandmeshgenerationbyusingcomputersimulationwiththehelpofvisualizationtechnologyItconsistsofthefollowingcontents

4、：Awarpskeletonmethodisproposedtodescribearbitraryarchitectureof3一Dwovencompositepreformwiththeunitcellbeingdecomposedintosubcells／grids，andrealizingdigitalizedstorageoffabricTheinitialquasimosaicmodeliSconstructedaccordi

5、ngtosubcellconceptandclassicalcrosssectionhypothesisTheiterativealgorithmchangesfibertow’Sshapegradually，whichiSclosetothetruesubstructure3DmodeliSrealizedbasedonthisCrosssection’SvariationiSstudiedthereasonofcrosssectio

6、ndeformationiSdiscussedandcrosssection’SvaryingruleiSanalyzedThepaperprobesintotheastringencyoftheiterativealgorithmTheoptimizedproportionformovingwarpandweftisobtainedBasedontheiterativealgorithm，thepaperdiscussestheyam

7、patternincrowdedstatusTheresultiSsimulatedoncomputersSpatialdatafieldofyarnisbuiltbasedon3DmodelanddatafieldofresiniSconstructedbyresinstuffingalgorithm，whicharevisualizedthroughVTKByusingimaginedyamsheetnodesareconnecte

8、dtogetherskillfullyandfiniteelementmeshesarepartitionedandgeneratedautomaticallyABAQUSinputfilegenerationprogramiswriten，whichrealizestheinterfacebetweenthemodellingsystemandABAOUSTheresearchshowsthatfibertow’sconcavecro

9、sssectionaltematedwithconvexoneperiodicallyinlengthwhichamends“invariablecrosssectionhypothesis”inrecentdecadesTheresultsindicatethatwhenitiSimpossibletoobtainmathematicalmodelofyamitiSeffectivetostudysubstructurethrough