Total views : 153
Method of Analytical Calculation of Critical Stress Intensity Factor and its Application in CAE System
Background/Objectives: Current importance of the study is stipulated by the high costs associated with ASTM E-399 field trials. The aim is to develop the new method to avoid or reduce them. Methods: The principle methods applied to the investigation of this problem are as follows: calculation of the critical value of stress intensity factor (SIF) employing analytical method and making use of the phySIFal and mechanical properties of the materials; calculation of SIF critical value experimentally, according to standard ASTM E-399 requirements. The study is accomplished with the verification tasks that prove the workability of the method and with the results of its implementation within the prototype software (PS). The PS belongs to Computer-Aided Engineering (CAE) systems and is applied to solve the issues of fracture strength and cracking resistance. Findings: The study presents the new method founded on the application of the modified Murakami formula to calculate the critical value of SIF. There is a new algorithm that explains the functions of the PS. The algorithm consists of two parts. The first part considers the structure without cracks; the second part describes the structure with a crack. The second part of the algorithm has a block that includes the modified formula for calculating the critical value of SIF. The new method of analytical calculation of the critical SIF holds for quasi-brittle materials (plasticity zone at the top of the crack is no larger than 20 %), and it takes into account the cracks in continual three-dimensional environment. It is used for the 1st type crack. This method in combination with the relevant PS is an innovation in the sphere of strength and cracking resistance analysis, insofar as it helps either reduce or avoid the costs associated with the field tests. Applications/Improvements: The materials of the study are of practical importance for industrial companies, educational and scientific institutions that study the issues of fracture strength and cracking resistance.
Fracture Mechanics, Critical Stress Intensity Factor, Finite Elements Method, Crack, Computer-Aided Engineering Systems, LEFM.
- Zehnder AT. Fracture mechanics. Springer Science & Business Media; 2012. DOI 10.1007/978-94-007-2595-9.
- Pestrikov VM. Fracture mechanics: Lectures. Profession; 2012.
- Carroll J, Daly S. Fracture, Fatigue, Failure, and Damage Evolution, 5: Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics. Springer. 2015. DOI 10.1007/978-3-319-06977-7.
- Shirakil N, Watanabe T, Kanno T. Relationship between fatigue limit and defect size in spheroidal graphite cast iron with different graphite spheroidization ratios and microstructures. materials transactions. The Japan Institute of Metals and Materials; 2015. DOI: 10.2320/matertrans.FM2015826.
- Renev SA. Development of an algorithm for solving problems of fracture mechanics. Materials Physics and Mechanics, Institute of Problems of Mechanical Engineering; 2016.
- Verzhbitskiy VM. Numerical methods (mathematical analysis and common differential equations). Textbook. Direct-Media; 2013.
- Gubich L. Industrial implementation of product life-cycle support information technologies. Litre; 2012.
- Davim JP. Statistical and computational techniques in manufacturing. Springer Science and Business Media; 2012. DOI: 10.1007/978-3-642-25859-6.
- Carroll J. Fracture and fatigue. 7: Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics. Springer Science & Business Media; 2013. DOI: 10.1007/978-3-319-00765-6.
- Kutz M. Mechanical engineers’ handbook. 1: Materials and Engineering Mechanics. John Wiley & Sons; 2015.
- Total Materia. Key to Metals AG [Internet]. 1999–2016. [cited 2016 Nov 22]. Available from: http://www.totalmateria.com.
- Renev SA. Development of mathematical model for detection of conditional sizes primordial cracks in LEFM and its implementation in Russian Cax system. Procedia Engineering. 150, 2nd International Conference on Industrial Engineering (ICIE-2016); 2016. p. 683–8. DOI: 10.1016/j.proeng.2016.07.078.
- ANSYS Release 14.5 Documentation; 2012.
- Morozov EM, Muyzemnek AYu, Shadskiy AS. ANSYS in the hands of an engineer: Fracture Mechanics. Stereotype. Moscow: LENAND; 2014.
- Kuna M. Finite elements in fracture mechanics: Theory - Numerics - Applications. Springer Science & Business Media; 2013. DOI: 10.1007/978-94-007-6680-8.
- Banihashemi MR, Mirzagoltabar AR, Tavakoli HR. The effects of yield mechanism selection on the performance based plastic design of steel moment frame. Indian Journal of Science and Technology. 2015 May; 8(9).
- Dhas LAK, Raguraman D, Muruganandam D, Senthilkumar B. Temperature prediction using finite element modeling on friction stir welding of AA6061-AZ61. Indian Journal of Science and Technology. 2015 Nov; 8(31).
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.