FRACTUREMECHANICS:EIGHTEENTHSYMPOSIUMEighteenthNationalSymposiumonFractureMechanicssponsoredbyASTMCommitteeE-24onFractureTestingBoulder,Colorado,25-27June1985ASTMSPECIALTECHNICALPUBLICATION945D.T.ReadandR.P.ReedNationalBureauofStandardseditorsASTMPublicationCodeNumber(PCN)04-945000-30#1916RaceStreet,Philadelphia,PA19103CopyrightbyASTMInt'l(allrightsreserved);ThuDec313:31:54EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.LibraryofCongressCatalogiiig-in-PabUcatioiiDataNationalSymposiumonFractureMechanics(18th:1985:Boulder,Colo.)Fracturemechanics.(ASTMspecialtechnicalpublication;945)"ASTMpublicationcodenumber(PCN)04-945000-30"Includesbibliographiesandindex.1.Fracturemechanics—Congresses.I.Read,D.T.II.Reed,R.P.(RichardPalmer),1934-.III.ASTMCommitteeE-24onFractureTesting.IV.Title.V.Series.TA409.N381985620.1'12687-30666ISBN0-8031-0949-0Copyright©byAMERICANSOCIETYFORTESTINGANDMATERIALS1988LibraryofCongressCatalogCardNumber:87-30666NOTETheSocietyisnotresponsible,asabody,forthestatementsandopinionsadvancedinthispublication.PrintedinAnnArbor,MIFebruary1988CopyrightbyASTMInt'l(allrightsreserved);ThuDec313:31:54EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.ForewordTheEighteenthNationalSymposiumonFractureMechanicswasheldon25-27June1985inBoulder,Colorado.ASTMCommitteeE-24onFractureTestingwasthesponsorofthissymposium.D.T.ReadandR.P.Reed,Na-tionalBureauofStandards,servedascoeditorsofthispublication.R.P.Reedalsoservedaschairmanofthesymposium.CopyrightbyASTMInt'l(allrightsreserved);ThuDec313:31:54EST2015Downloaded/printedbyUniversityofWashington(UniversityofWashington)pursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.RelatedASTMPublicationsFractureMechanics:SeventeenthConference,STP905(1986),04-905000-30FractureMechanics:SixteenthSymposium,STP868(1985),04-868000-30FractureMechanics:FifteenthSymposium...