非均质材料零件沉积成形技术研究

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1、大连理工大学博士学位论文非均质材料零件沉积成形技术研究姓名：江连会申请学位级别：博士专业：机械制造及其自动化指导教师：郭东明;贾振元20060701非均质材料零件沉积成形技术研究建立了不同丝距下的丝宽模型。在实验的基础上，确定了挤出速度与丝距的关系曲线以及影响成形质量的主要工艺参数。建立了挤出速度与填充速度的匹配关系。通过制造的单一丝向试件和不同丝向对称层合试件，验证了提出的力学模型。最后，应用上述理论与方法，在开发的实验系统上制造了用于飞机风洞模型的特殊力学性能等厚度板。关键词：快速成形技术；非均

2、质材料零件；宏观力学；细观力学大连理I：大学博七学位论文StudyonHeterogeneousMaterialPartsDepositionManufacturingTechonlogyAbstractWi也thefastdevelopmentofaviationtechnology．aerospacetechnology,bioengineeringtechnologyandmicroelectronictechnology，thefunctionrequirementofmaterialsan

3、dpartsbecomesmoleseveredaybydayandpartswithsingleorhomogeneousmaterialhardlyme尼'ttherequirementoftheproducts．Thusweshoulddesignandmanufacturepartsaccordingtothebestusefunctionofthepartstomeetthefunctionalgradedandintelligentrequirementoftheparts．Lookin

4、gintothe21stcentury，parts，whichhaveheterogeneousstructureandmicro-mechanicalstructuretorealizebestorganizationofmaterialsstructureandpartsfunction，willbetheinevitablerequestofthedevelopmentofscienceandtechnology．Becauseoftheheavydemandofheterogeneousma

5、terialparts，thedesignandmanufactureofheterogeneousmaterialpartsbecomethefocusofmanufacturingindustry．Rapidprototyping(RP)technologiesmanufacturefunctionalcomplicatedshapepartsormodelsswiftlywithoneormultimaterialsbyaddingmaterialsandnoneedforprefbnnedm

6、andrelsortoolings，sotheybecomeoneoftheimportantwaystomanufactureheterogeneousmaterialparts．Fuseddepositionmanufacturing(FDM)isoneofthetypicalRPtechnologies．Soit’sveryimportanttodevelopthepotentialabilityoftheFDMtomanufactureheterogeneousmartialparts．Th

7、roughdifferentdepositiondensityandorientation，heterogeneousmatedalpartscanbeproducedwithneededmechanicsproperty．nemechanicspropertyoftheheterogeneouspartscanbeanalyzedbymechanicsofcompositematerials．Theyareconvenientlystudiedfromtwopointsofview：microme

8、chanicsandmacromechanics．Macromechanicsisthestudyofmaterialsbehaviorwhereinthematerialispresumedhomogeneousandtheeffectsoftheconstituentmaterialsaledetectedonlyasaveragedapparentpropertiesofthecomposite．Micromechanicsisthestudyofmateria