Determination of the Coefficients of the Crack Growth Rate Equation upon Cyclic Load
Abstract
No general procedure for determination of Paris coefficients is available nowadays. An approach providing determination of the intermediate values of the crack growth rates on da/dN - dK fatigue fracture curve in each test is developed. The effect of the crack closure on the crack growth rate is demonstrated and the apmlitute of the effective stress intensity factor (SIF) is obtained. Prospects of developing the proposed procedure are discussed, for example, to determine the region of stable crack growth on da/dN - dK curve leading to the fracture.
About the Authors
A. N. Savkin
Волгоградский государственный технический университет
Russian Federation
Russian Federation
A. V. Andronik
Волгоградский государственный технический университет
Russian Federation
Russian Federation
R. . Koraddy
BiSS-ITW
Russian Federation
Russian Federation
References
1. Sunder R. Unraveling the Science of Variable Amplitude Fatigue / Journal of ASTM International. 2012. Vol. 9. N 1. P. 20 - 65.
2. Shijve J. Fatigue of Structures and Materials. - Delft: Springer, 2009. - 621 p.
3. Bannantine J. A., Corner J. J., Handrock J. L. Fundamentals of Metal Fatigue Analysis. - New Jersey: Prentice Hall, 1989. - 273 p.
4. Bekal S. Calculation of Fatigue Crack Growth on Variable Amplitude Loading: Master thesis. Manipal Institute of Technology. - Manipal, India. 2013. -118 p.
5. Sunder R. Engineering Application of Threshold Stress Intensity. ASTM-ESIS Annual Symposium on Fracture Mechanics, Florida, USA, 13-15 Nov., 2013. P. 24-48.
6. Сервогидравлическая машина для испытания материалов BiSS Nano [Электронный ресурс]. URL: http://biss.in/cms/ index.php?opti-on=com_content&view=article&id=69&Itemid=111.
7. Standard Test Method for Measurement of Fatigue Crack Growth Rates ASTM E647-08, 2008. - 45 p.
8. Трощенко В. Т., Лебедев А. А., Стрижало В. А. Механическое поведение материалов при различных видах нагружения. - Киев: Логос, 2000. - 571 с.
9. Горяинов В. Б., Павлов И. В., Цветкова Г. М. Математическая статистика. - М.: Изд-во МГТУ им. Н. Э. Баумана, 2001. - 424 с.
10. Forman R. G., Mettu S. R. Behavior of Surface and Corner Cracks Subjected to Tensile and Bending Loads in Ti-6Al-4V Alloy. Fracture Mechanics: 26th ASTM Symposium, Philadelphia, USA, ASTM STP 1131. 1992. Vol. 1. P. 519-546.
11. Savkin A. N., Sedov A. A., Andronik A. V. The steel damageability simulation under random loading by the power, energetical and strain fracture criterions / Periodica Polytechnica. Mechanical Engineering. 2014. Vol. 58. N2. P. 119-126.
Review
For citations:
Savkin A.N., Andronik A.V., Koraddy R. Determination of the Coefficients of the Crack Growth Rate Equation upon Cyclic Load. Industrial laboratory. Diagnostics of materials. 2016;82(1):57-63. (In Russ.)
Views:
475
Email this article 