Elastic-plastic model of fatigue crack growth in the surface of thick-walled structures under biaxial loading
Authors: Vansovich К.А.
Published in issue: #3(63)/2017
DOI: 10.18698/2308-6033-2017-3-1596
Category: Mechanics | Chapter: Mechanics of Deformable Solid Body
The model of surface crack growth in thick-walled elements of structures under the biaxial cyclic loading is presented. The dependence of surface crack growth rate on the degree of loading biaxiality is established on the basis of experimental data obtained from the results of testing cruciform specimens. The strain field in the vicinity of cracks is investigated taking into account elastic-plastic material properties using the ANSYS program. Destruction at the fatigue crack tip is represented as a combination of brittle fracture at the crack tip and ductile fracture in the zone of plastic deformation. The formula is proposed for determining the rate of fatigue surface crack growth in view of the brittle and viscous stress parameters at the crack tip. The obtained results allow determining with greater accuracy the remaining service life of structures with a surface crack in the case of biaxial loading.
References
[1] Raju I., Newman C. Journal of Pressure Vessel Technology, 1982, vol. 104, pp. 293-298.
[2] Ostsemin A.A., Zavarukhin V.Yu. Problemy Prochnosti - Strength of Materials, 1993, no. 12, pp. 1-59.
[3] Krasovskiy A.Ya., Orynyak I.V., Torop V.M. Problemy Prochnosti - Strength of Materials, 1990, no. 2, pp. 16-20.
[4] Fokin M.F. Otsenka prochnosti trub magistralnykh truboprovodov s defektami stenki, orientirovannymi po okruzhnosti truby, po kriteriyu vozniknoveniya techy pered razrusheniem [Assessing pipe strength of long-distance pipeline with wall defects oriented along the circumference of the pipe on the criterion of the occurrence of a leak before destruction]. Prikladnaya mekhanika i tekhnologii mashinostroeniya. Sbornik nauchnykh trudov [Applied Mechanics and Mechanical Engineering. Collected scientific works]. Nizhniy Novgorod, Intelservis Publ., 2005, pp. 69-76.
[5] Sahu Y., Moulick S. International Journal of Advanced Engineering Research and Studies, 2015, vol. 4, pp. 231-235.
[6] Shahani A., Habibi S. International Journal of Fatigue, 2007, vol. 29, pp. 128-140.
[7] Mironov A.A., Volkov V.M. Problemy Prochnosti - Strength of Materials, 2006, no. 68, pp. 45-51.
[8] Lee S., Kim I., Park Y., Kim J., Park C. Journal of the Korean Nuclear Society, 2001, vol. 33, no. 5, pp. 526-538.
[9] Ni K., Hu P. Three-dimensional Finite Element Modeling of Surface Crack on Titanium tubes. AIAA Modeling and Simulation Technologies Conference, Chicago, August 10-13, 2009, pp. 10-13.
[10] Terfas O., Alaktiwi A. Ductile Crack Grows in Surface Cracked Pressure Vessels. International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, 2013, vol. 7, no. 1, pp. 46-52.
[11] Chen Y., Lambert S. International Journal of Pressure Vessels and Piping, 2005, vol. 82, pp. 417-426.
[12] Qiao X., He S. Technische Mechanik, 1998, vol. 18, no. 4, pp. 277-284.
[13] Grabulov V., Sedmak S., Sedmak A. Scientific Technical Review, 2007, vol. 57, no. 3-4, pp. 32-42.
[14] Sedmak A., Berkovic M., Savovic N. Structural Integrity and Life, 2004, vol. 4, no. 2, pp. 91-100.
[15] Terfas O. International Journal of Mining, Metallurgy and Mechanical Engineering, 2014, vol. 2, no. 1, pp. 1-5.
[16] Vansovich K.A., Jadrov V.I. Omskiy nauchnyy vestnik - Omsk Scientific Bulletin, 2012, no. 3 (113), pp. 117-122.
[17] Vansovich K., Jadrov V., Beseliya D. Procedia Engineering, 2015, no. 113, pp. 244-253.
[18] Paris P., Erdogan F. Journal of Basic Engineering, 1963, vol. 85, pp. 528-534.