粘彈性材料動(dòng)態(tài)擴(kuò)展裂尖場(chǎng)及載荷參數(shù)研究.pdf

1、分類號(hào)：——UDC：工學(xué)碩士學(xué)位論文密級(jí)：——編號(hào)：粘彈性材料動(dòng)態(tài)擴(kuò)展裂尖場(chǎng)及載荷參數(shù)研究碩士研究生指導(dǎo)教師學(xué)位級(jí)別學(xué)科、專業(yè)所在單位論文提交日期論文答辯日期學(xué)位授予單位：邊科：唐立強(qiáng)教授：工學(xué)碩士：固體力學(xué)：建筑工程學(xué)院：2007年5月：2007年6月：哈爾濱工程大學(xué)哈爾濱工程大學(xué)碩士學(xué)佗論文ABSTRACTAstudyonthefieldofdynamicpropagatingcracktiphasvitalsignificance

2、tothematerialfracturedestructionresearchwhilethetime—dependentmechanicalpropertiesofmaterialhavetremendousinfluenceontherigidity，theintensityandtheservicelifeofthestructureAtthesimetimetheapplicationofloadparameterofthec

3、racktipisextremelywidespreadincharactizingthecracktippropertiesBasedonthese，thisarticlestudiedtheproblemsofdynamicpropagatingcrackintheviscoelasticmaterial，whichhastimedependentdeformationcharacteristicThedynamicpropagat

4、ingcrackinincompressibleviscoelasticmaterialisdetailedlystudiedundertheplanestrainconditionfirstlyEmbarkingfromthefundamentalequationcombiningwiththeanalysisonthesingularityofcracktipfields，theasymptoticgoverningequation

5、sarededucedWithsoluting—deteriminingconditions，thestress，strainanddisplacementfieldsnearthetipofmodeIandIIcrackareobtainedbyusingtheshootingmethod，ThelawsofcracktipfieldsalongwithvariationaleachparameteraredisussedBycomp

6、aringwithotherresults，theaccuracyoftheobtainedoutcomeisdemonstratedSecondlythedynamicpropagatingcracktipfieldsincompressibleviscoelasticmaterialformodeIandIIarestudiedwhiletheanalysisissimilartothefirststepTherulesoffiel

7、dsalongwithparmetersaredebatedalsoWhenthePoisson’sratiol，isequaltoO5theresultscartcompletelydegeneratetothoseinincompressiblesituationsothevalidityoftheresultsincompressiblesituationisverifiedFinallyforthecracktiploadpar

8、ameterC’integral，byitsdefinitionandtheanalysisofsingularitythepathdependentpropertiesareinvestigated；Usingthecracktipfieldsinincompressiblesituation，theregularityofC’Callbereflectedbyasolvablevalue4，accordinglythevariati