【英文标准名称】:StandardTestMethodforDeterminationofResistancetoStableCrackExtensionunderLow-ConstraintConditions
【原文标准名称】:低限制条件下防止稳定裂缝扩张测定的标准试验方法
【标准号】:ASTME2472-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E08.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:条件;裂缝;测定;加长件;金属材料;耐力;稳定的;试验
【英文主题词】:crack-openingdisplacement(COD);crack-tip-openingangle,CTOA;crack-tip-openingdisplacement,CTOD;criticalCTOA(c);5resistancecurve;ductilefracture;elastic-plasticfracture;fractureinstability;low-constraintspecimens
【摘要】:1.1Thisstandardcoversthedeterminationoftheresistancetostablecrackextensioninmetallicmaterialsintermsofthecriticalcrack-tip-openingangle(CTOAc),cand/orthecrack-openingdisplacement(COD),5resistancecurve().Thismethodappliesspecificallytofatiguepre-crackedspecimensthatexhibitlowconstraint(crack-length-to-thicknessandun-crackedligament-to-thicknessratiosgreaterthanorequalto4)andthataretestedunderslowlyincreasingremoteapplieddisplacement.Therecommendedspecimensarethecompact-tension,C(T),andmiddle-crack-tension,M(T),specimens.Thefractureresistancedeterminedinaccordancewiththisstandardismeasuredasc(criticalCTOAvalue)and/or5(criticalCODresistancecurve)asafunctionofcrackextension.Bothfractureresistanceparametersarecharacterizedusingeitherasingle-specimenormultiple-specimenprocedures.Thesefracturequantitiesaredeterminedundertheopeningmode(ModeI)ofloading.Influencesofenvironmentandrapidloadingratesarenotcoveredinthisstandard,buttheusermustbeawareoftheeffectsthattheloadingrateandlaboratoryenvironmentmayhaveonthefracturebehaviorofthematerial.1.2Materialsthatareevaluatedbythisstandardarenotlimitedbystrength,thickness,ortoughness,ifthecrack-length-to-thickness(a/B)ratioandtheligament-to-thickness(b/B)ratioaregreaterthanorequalto4,whichensuresrelativelylowandsimilarglobalcrack-frontconstraintforboththeC(T)andM(T)specimens(,).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparentheses(English)areforinformationpurposesonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:26P.;A4
【正文语种】:


【英文标准名称】:Cookware-Pressurecookersfordomesticuse.
【原文标准名称】:炊具.家用压力锅
【标准号】:NFD21-351/A1-2005
【标准状态】:现行
【国别】:法国
【发布日期】:2005-11-01
【实施或试行日期】:2005-11-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Y68
【国际标准分类号】:97_040_20;97_040_60
【页数】:5P;A4
【正文语种】:其他