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大小:5.31 MB
页数:80页
时间:2019-03-08
《二维裂纹扩展数值模拟与疲劳寿命预测》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、CONTENTSAbstract(Chinese)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..IAbstract(English)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IIIChapterlIntroduction⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.1Backgroundandsignificanceoftheresearch⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..11.2Researchstatusofcrackpropagation.
2、..............................................................21.2.1Finitelementmethod.⋯..⋯.⋯.⋯.⋯.⋯.⋯.⋯⋯..⋯..⋯⋯.⋯⋯⋯⋯.⋯⋯.⋯...21.2.2Extendedfinitelementmethod.............................................................41.2.3Elementfreemethod.........................
3、....................................................51.3MainContents..................................................................................................6Chapter2NumericalsimulationtechniquesforSIF⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72.1Stressfieldnearcracktip⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
4、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72.2SIFcalculation.................................................................................................92.2.1Displacementextrapolationmethod⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯..92.2.2Openingdisplacementmethod⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯102.2.3Jintegralmethod⋯⋯⋯⋯⋯⋯
5、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯132.3Numericalexamples.......................................................................................152.3.1FiniteplatewithacentralcrackunderpuremodeI⋯⋯⋯⋯⋯⋯⋯⋯⋯.152.3.2InfiniteplatewithacentralcrackunderpuremodeII⋯⋯⋯⋯⋯⋯⋯⋯202.3.3Infinitep
6、latewithacentralinclinedcrackundermixedmode⋯⋯⋯..212.4Summary........................................................................................................24Chapter3Numericalsimulationofcrackgrowthpath⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯253.1Causesofmixed..modecrack............
7、.............................................................25:;.2Calculationofcrackpropagationangle⋯.⋯.⋯.⋯.⋯⋯⋯.⋯.⋯.⋯⋯⋯⋯.⋯.⋯⋯253.3CrackedbodymodelingandanalysisofSIF⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.27:;.4Numericalexamples⋯⋯⋯⋯.⋯..⋯.⋯.⋯.⋯⋯.⋯.⋯.⋯..⋯⋯.⋯⋯⋯..⋯⋯⋯.⋯.⋯..293.4.1SIFcalculationf
8、oraplatewithsingle-edgecrack⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯293.4.2Crackpropagationofasingle—edgecrackedplate⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯29III山东大学硕士学位论文3.4.3Crackpropagationofafour-poin
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