低碳钢拉伸试样断口形状分析

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:(1962-),,(,226006):,:;;:TG142:B:1009-9522(2003)04-0018-03AnalysisOfFractureShapeOfLow-carbonSteelTensileTestSampleDINGJian-bo(NantongShippingVocational&TechnicalCollege,NantongCity,JiangsuProvince,226006)Abstract:PracticeteachingisoneoftheimportantlinkinHVEteachingandtheimportantmeanstocombinetheorywithpractice.Thispaperdiscussesthefractureshapeofthetensiletestsampleinpracticeteachingofme2chanics.Keywords:Steelwork,Tensilefracture,Analysis,:,:,45,,,,45,,?,:A(L-P)L,()P,:11,LP:L=PL/EA,LA;E21,,P,,A31,,,,,41G,81200314JournalofJiujiangVocational&TechnicalCollege©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,(B):B11:,,21:45,,:,C,,maxmax,:Cmax=a[1+(a/2R)]/[1+(a/4R)]max=a[1+(a/4R)]:a=P/(a2)aRC,(r)(),,,,:,,,,60%,:,,,,,=6%-8%,,,,,,,,,,,,,,,45,,,,,,:,,,0,:1=[1-v(2+3)]/E,r,,,,,,,,45,,45,,,,:,91200314(:)©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,,,,:,DD,r2,maxr2=1-v(2+3)max=(1-3)/2m=max/r2,,,max=/2,r2=m1m1=max/r2=1/2Om1=1/2OA,,,,,,max=(1-3)/2=(0-t)/2r2=1-v(2-3)=0-v(r-t)m2:m2=max/r2=[(0-t)/2]/[0-v(r-t)]m1=1/2AB,,,45,,:11,21,45,()(28),31,,,PLC,,PLCU,,,,,150mm,,100mm,41,,,,,,(12),,,,,,,,()02200314JournalofJiujiangVocational&TechnicalCollege