{"title":"Application of a Fracture-Mechanics Approach to Gas Pipelines","authors":"\u013dubom\u00edr Gajdo\u0161, Martin \u0160perl","volume":49,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":67,"pagesEnd":75,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10332","abstract":"This study offers a new simple method for assessing\r\nan axial part-through crack in a pipe wall. The method utilizes simple\r\napproximate expressions for determining the fracture parameters K,\r\nJ, and employs these parameters to determine critical dimensions of a\r\ncrack on the basis of equality between the J-integral and the J-based\r\nfracture toughness of the pipe steel. The crack tip constraint is taken\r\ninto account by the so-called plastic constraint factor C, by which the\r\nuniaxial yield stress in the J-integral equation is multiplied. The\r\nresults of the prediction of the fracture condition are verified by burst\r\ntests on test pipes.","references":"[1] S. Cravero and C. Ruggieri, \"Structural Integrity Analysis of Axially\r\nCracked Pipelines Using Conventional and Constraint - Modified\r\nFailure Assessment Diagrams,\" in Int. Journal of Pressure Vessels and\r\nPiping 83, 2006, pp. 607 - 617.\r\n[2] S. Saxena and D.S. Ramachandra Murthy, \"Elastic - Plastic Fracture\r\nMechanics Based Prediction of Crack Initiation Load in Through - Wall\r\nCracked Pipes,\" in Engineering Structures 26, 2004, pp. 1165 - 1172.\r\n[3] J. Zemankova, \"Instability of Surface Defects in a Thin-Walled Linepipe\r\n(in Czech),\" in Research Report V-KMtr-157\/84, CTU Prague, 1984\r\n[4] M.R. Ayatollahi and H. Khoramishad, \"Stress Intensity Factors for an\r\nAxially Oriented Internal Crack Embedded in a Buried Pipe,\" in Int.\r\nJournal of Pressure Vessels and Piping 87, 2010, pp. 165 - 169\r\n[5] X. Wang and S.B. Lambert, \"On the Calculation of Stress Intensity\r\nFactors for Surface Cracks in Welded Pipe-Plate and Tubular Joints,\" in\r\nInt. Journal of Fatigue 25, 2003, pp. 89 - 96\r\n[6] X. Wang and S.B. Lambert, \"Stress Intensity Factors and Weight\r\nFunctions for Longitudinal Semi-Elliptical Surface Cracks in Thin\r\nPipes,\" in Int. Journal of Pressure Vessels and Piping 65, 1996, pp. 75 -\r\n87\r\n[7] T.L. Anderson, Fracture Mechanics: Fundamentals and Applications.\r\n3rd Edition. New York: CRC Press; 2005\r\n[8] C. Betegon and J.W Hancock, \"Two-Parameter Characterization of\r\nElastic-Plastic Crack-Tip Fields,\" in Journal of Applied Mechanics 58,\r\n1991, pp. 104 - 110\r\n[9] F. Wallner, F.M. Oberhauser, and H. Mildner, \"Evaluation of the\r\nBehaviour of Large Pressure Vessels by Means of Fracture Mechanics\r\nTests,\" in International Conference: Fracture Toughness Testing -\r\nMethods, Interpretation and Application, The Welding Institute, London\r\n9-10 June 1982\r\n[10] S. Cravero and C. Ruggieri, \"Correlation of Fracture Behavior in High\r\nPressure Pipelines with Axial Flaws Using Constraint Designed Test\r\nSpecimens - Part I: Plane - Strain Analyses,\" in Engineering Fracture\r\nMechanics 72, 2005, pp. 1344 - 1360\r\n[11] I.S. Raju and J.C. Newman, Jr., \"Stress Intensity Factors for Internal and\r\nExternal Surface Cracks in Cylindrical Vessels,\" in Journal of Pressure\r\nVessel Technology 104, 1982, pp. 293 - 298\r\n[12] J.C Newman and I.S. Raju, \"An Empirical Stress Intensity Factor\r\nEquation for the Surface Crack,\" in Engineering Fracture Mechanics 15,\r\n1981, pp. 185 - 192\r\n[13] Y. Murakami, Stress Intensity Factors Handbook. The Society of\r\nMaterials Science, Japan, Pergamon Press, Oxford, 1987\r\n[14] E.S. Folias, \"On the Theory of Fracture of Curved Sheets,\" in\r\nEngineering Fracture Mechanics, No.2, Vol.2, 1970, pp. 151-164\r\n[15] J.C. Newman, \"Fracture Analysis of Surface and Through-Cracked\r\nSheets and Plates,\" in Engineering Fracture Mechanics, Vol.5, No.3,\r\n1973, pp. 667-689\r\n[16] RCC-MR: Design and Construction Rules for Mechanical Components\r\nof FBR Nuclear Island. First Edition (AFCEN - 3-5 Av. De Friedeland\r\nParis 8), 1985\r\n[17] I. Milne, R.A. Ainsworth, A.R. Dowling, and A.T. Stewart,\r\n\"Assessment of the Integrity of Structures Containing Defects,\" in\r\nCEGB Report No. R\/H\/R6 - Rev.3, Central Electricity Generating Board,\r\nLondon, United Kingdom, 1986.\r\n[18] L. Gajdo\u253c\u00ed and M. Srnec, \"An Approximate Method for J Integral\r\nDetermination,\" in Acta Technica CSAV, Vol.39, No.2, 1994, pp.151-\r\n171\r\n[19] R.A. Ainsworth and N.P. O'Dowd, \"Constraint in the Failure\r\nAssessment Diagram Approach for Fracture Assessment, Trans.\r\nASME,\" in Journal of Pressure Vessel Technology, Vol.117, 1995, pp.\r\n260-267\r\n[20] R.A. Smith and K.J. Miller, \"Fatigue Cracks at Notches,\" in\r\nInternational Journal of Mechanical Sciences, Vol.19, 1977, pp.11-22.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 49, 2011"}