Influence of Notch Depth-to-Width Ratios on J-Integral and Critical Failure Load of Single-Edge Notched Tensile Aluminium 8011 Alloy Specimens
الموضوعات :
C.S Sumesh
1
(Department of Mechanical Engineering, Amrita School of Engineering, Coimbatore Amrita Vishwa Vidyapeetham, India)
P.J Arun Narayanan
2
(Department of Mechanical Engineering, Amrita School of Engineering, Coimbatore Amrita Vishwa Vidyapeetham, India)
الکلمات المفتاحية: J-integral, fracture toughness, Aluminium 8011 alloy, Notch depth, Critical failure load,
ملخص المقالة :
In this paper, the influence of notch depth-to-width ratios on J-integral and critical load of Aluminium 8011 alloy specimens with U-notch under Mode I loading are studied. Using experiments, for a set of specimens having different notch depth–to–width ratios, J-integral was found and the same was verified using analytical methods. Further, using the results obtained from the experiments, failure assessment diagrams (FAD) were plotted for the same ratios, to determine the safe or critical load and the type of failure mechanism was also studied. The results show that, for both shallow and deep notch depths, the J-integral values obtained from the experimental method, are in very close agreement with the analytical values. J-integral values decrease with increase in notch depth and increase with increase in applied load. Furthermore, from FAD, the safe load decreases when the notch depth-to-width ratio increases and it was found that, all the tested specimens failed due to elastic plastic deformation mechanism.
[1] Mohan Kumar S., Pramod R., Shashi Kumar M.E., Govindaraju H.K., 2014, Evaluation of fracture toughness and mechanical properties of Aluminum alloy 7075, T6 with Nickel coating, Procedia Engineering 97: 178-185.
[2] Shih C.F., Hutchinson J.W., 1976, Fully plastic solutions and large-scale yielding estimates for plane stress crack problems, Journal of Engineering Materials and Technology 98: 289-295.
[3] Vijayan V.J., Arun A., Bhowmik Sh., Abraham M.C., Ajeesh G.B., Pitchan M. Kb., 2016, Development of lightweight high-performance polymeric composites with functionalized nanotubes, Journal of Applied Polymer Science 133: 43471.
[4] Kumar V., German M.D., Shih C.F., 1981, An Engineering Approach for Elastic-Plastic Fracture Analysis, Electric Power Research Institute, Calofornia.
[5] Shimakawa T., Asada Y., Kitagawa M. , Kodaira T., Wada Y., Asayama T., 1992, Analytical evaluation method of J-integral in creep-fatigue fracture for type 304 stainless steel, Nuclear Engineering and Design 133: 361-367.
[6] Rice J.R., 1968, A path independent integral and the approximate analysis of strain concentration by notches and cracks, Journal of Applied Mechanics 35: 379-386.
[7] Alan T., Zehnder A., Rosakis J., Krishnaswamy S., 1990, Dynamic measurement of the j-integral in ductile metals, Comparison of Experimental and Numerical Techniques International Journal of Fracture 42: 209-230.
[8] Begley J. A., Landes J. D., 1972, The J- integral as a fracture criterion, ASTM 1972: 1-20.
[9] Montgomery S.S. R., 1976, J-Integral measurements on various types of specimens in AISI 304, Commission of the European Communities Nuclear Science and Technology 2008: 2-28.
[10] Aldo F., 1984, Experimental measurement of the J-integral engineering fracture mechanics, Engineering Failure Analysis 19(4): 1105-1137.
[11] Madrazo V., Cicero S., García T., 2014, Assessment of notched structural steel components using failure assessment diagrams and the theory of critical distances, Engineering Failure Analysis 36: 104-120.
[12] Tipple C., Thorwald G., 2012, Using the failure assessment diagram method with fatigue crack growth to determine leak-before-rupture, SIMULIA Customer Conference.
[13] Akhurst K.N., Milne I., 1984, Failure assessment diagrams and J-estimates: validation for an austenitic steel, Application of Fracture Mechanics to Materials and Structures 1984: 401-413.
[14] Hasanaj A., Gjeta A., Kullolli M., 2014, Analyzing defects with failure assessment diagrams of gas pipelines, World Academy of Science, Engineering and Technology International Journal of Mechanical and Mechatronics Engineering 8(5): 1045-1047.
[15] Marcos A., Bergant A., Yawny A., Juan E., Perez I., 2015, Failure assessment diagram in structural integrity analysis of steam generator tubes, International Congress of Science and Technology of Metallurgy and Materials 8: 128-138.
[16] Xudong Q., 2013, Failure assessment diagrams for circular hollow section X- and K-joints, International Journal of Pressure Vessels and Piping 104: 43-56.
[17] Matvienko Y. G., 2013, Notch Fracture Mechanics Approaches in an Analysis of Notch-like Defects, ECF.
[18] Matvienko Y., 2013, Safety factors in structural integrity assessment of components with defects, International Journal of Structural Integrity 4(4): 457-476.
[19] Mostafa S., Elsaadany M., Younan Y.A., Hany F.A., 2014, Determination of shakedown boundary and failure-assessment-diagrams of cracked pipe bends, Journal of Pressure Vessel Technology 136: 011209-1-9.
[20] Anthony H., Mikhail T., Hertele S., 2015, Failure prediction of curved wide plates using the strain- based failure assessment diagram with correction for constraint and notch radius, Journal of Pressure Vessel Technology 137: 021208-1-10.
[21] Luis F.S., Parise C. R., Noel P., Dowd O’., 2015, Fully-plastic strain-based J-estimation scheme for circumferential surface cracks in pipes subjected to reeling, Journal of Pressure Vessel Technology 137: 041204-1-8.
[22] Giorgio D., Candida P., 2010, A failure assessment diagram for components subjected to rolling contact loading, International Journal of Fatigue 32(2): 256-268.
[23] Lie S.T., Li T., 2014, Failure pressure prediction of a cracked compressed natural gas (CNG) cylinder using failure assessment diagram, Journal of Natural Gas Science and Engineering 18: 474-483.
