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1、西北工业大学硕士学位论文整体翼梁结构断裂特性分析与研究姓名：刘进征申请学位级别：硕士专业：固体力学指导教师：黄其青20060302整体翼粱结构断裂特性分析与研究摘要应硝大型一体亿整体绦构代替传统钏接缀合络梅己成为当今蕊内外飞祝缭捣研制熟〜大趋势，整｛奉缝鞫的挽努主要在于鲍搦承载能力强、结构熏鳖辍，应力嶷中部德和潜在疲劳裂纹起裂源少，口加工工艺简单。傻是，整体缭构畿存在〜宠蕊不是,由予箕缺少巒钉孔这槎豹“天然”止裂元捧蔼搜黎冀被损蜜垒蛙畿受到不浏影#
2、«这秘熬钵缝捻鹳技蕭裂特性掇比港冕的挪接缀台结构1程抗蛭裂特经有司翡降低，聂因为藏，整骼结秘麟袈穗骸分聿厳
3、威为警令工程鮫寒谈壤，姆翻处靛登工程技术领域新豹关注意。本文钟对工程实际屮憊侮鬟粱的损伤容限设计闰麓，系统呑并究整体翼聚结掏驹挠戮毅将缝，艇强工程窝限元计算软粹ANSYS,分褥整体冀梁无裂纹绐掏藏力，确定结构珥裂模式；根据最大拉应力礁则，分析裂纹扩展軌述，釆用有限元塞揍位移法，诗芬裂纹沿不同孰逊增长麴裂纹尖鳍应力强度因子；讨论繁体爨鬃上熬祭翔宽浚、褒痰、位嚣，有蕊投与无隔缀等结擒参数变化对应力强度因子瀚影稳｛遴过大鑿鹤分援诗雾,提袋霹憲接为工程虚弱暇努靛应力臻凄诗嚣魏线,绘密哥供飞撬蹩体翼梁援饶邪隈滚诗参考麓诗舞分辑秘缀浚。煲键诞：整体冀粱籁断裂特性损伤
4、窑陵应力强度因了裂纹扩展辕逐骞艰元ethetrad•1t•1()na1r•1Vetedc0mb•1nedstructures•1satrendy•1na•1rcraftstructureresearch,the•ntegra1structurehaVes0meadVantage0fg00dsupP0rt•ngab•1ity91owwe•1ght9fewp1ace0fstressc0ncentrat•10nandp0tent•1a1fat•1guecracks0urce9simp1emachiningtechnology,Butitiswe11knownt
5、hattheintegralstructurehavesomedeficiency,forexample,thedisrepairsafetycharacterofthiskindofstructurc•1sweakbccausc0f1ackofthcr•1Vctwh•1chisthcunatura1”CrackArrestcdcomponcntthat■1s。theant:i—-fracturea1)i1ityoftheintegra1structuremaybe10werthantherVetedstructure.,B(scauseofthif5r
6、eas;on,thefracturecharacter0fintegra1structurebecamethenewattentonprob1eminthef•1e1dofcnginccr•1ng，CsPcc•1a11ythcaViat•10ncng•1neer•1ng•Fr0inthedamaget01erancedesign0fPractica1Integra1wingbeamstructurettheant•1—-fractureabi1•ty0fw•ngbeamstructurewasresearched,thestressandcrack•ng
7、mode0fIntegra1w•ngbeamuncrackedstructurewereana1yzedusingthcFEMsoftwarcANSYStmaximumpul1rule,thepathofcrackgrowthwasana1yzed,usingfinitee1ementdirectdisp1acementmethod,theSIFofcracktipwhencrackpropagatealongthevariedpath^theeffectsparametersoition,fthestringer,suchas：thewidth,ame
8、etconStFwasresearcProv•dedandcanbePract•1caIIoncanhe1Pthedamagct01crancedcs•1gn0fmsIrucIureoThroughalotofnumericaKeyWords:Wing—BeamIntegrayused,theanaIys•1sandconcIus;iaircraftintegra1wingbeaations,thestressintensitheStringer；Fractcharacteristics；Damagetolerance；StressIntensityFa
9、ctor；thepathofcrackgrowth・FEM(finiteelem
