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Evaluation of the Effective Distance by Stress Triaxiality on Mixed Mode Fracture I+II - Volumetric Approach
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DOI: https://doi.org/10.15866/ireme.v10i4.8385
Abstract
The majority of structures contain singularities that cause a high stress concentration on the root of defect which affect the mechanical properties. In this regard, it’s important to take into account that the development process of fracture phenomenon requires a physical volume of elaboration of failure process. The concept of determination of this volume forces us to defineits diameter that called the effective distance. In order to settle this issue, the current paper proposes a new method such as stress triaxiality to define the fracture process zonecaused by aU-notch in a volumetric approach that’s examined under a mixed mode I+II. The bend specimens are computed by finite element method (FEM) and the local stress distribution was calculated by the Abaqus/CAE. The study shows a credibility of the criteria (χ stress gradient and β parameter of triaxiality) to determine the effective distance along the notch. The comparison between the various values shows a good agreement.
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References
Elbari. Study of the effect of the notch on the fatigue strength of notched structures. Rabat: PhD thesis, University Mohamed V in Rabat, Rabat, Morocco, in 1998.
Kadi. Paper presented at the Laboratory of mechanical reliability. University of Metz. 1998.
Qilafku. fatigue failure and determining life notched trees. Report represented at the Laboratory of mechanical reliability. 1999
Al Gaoudi, O., Achemlal, I., El Minor, H., Pluvinage, G., Plastic Zone and Volumetric Approach-Mixed Mode Fracture I+II Emanating From Notches, (2015) International Review of Mechanical Engineering (IREME), 9 (2), pp. 160-166.
http://dx.doi.org/10.15866/ireme.v9i2.5279
G. Pluvinage, Fatigue and fracture emanating from notch; the use of the notch stress intensity factor. Nuclear Engineering and Design 185, 1998, 173-184.
http://dx.doi.org/10.1016/s0029-5493(98)00183-6
Davis, Transactions American Society of Mechanical Engineers. Journal of Applied Mechanics, pp. 25-30, 1959.
Abaqus/CAE 6.14 Software finite element developed for visualizing and modeling for such solvers.
H. El Minor. An elliptical fracture criterion for mixed mode fractures I+II emanating from notches. Structural Engineering and Mechanics, Vol. 26, No. 1, 2007.
http://dx.doi.org/10.12989/sem.2007.26.1.087
H. El Minor, Brittle Mixed-Mode (I+II) Fracture: Application of the Equivalent Notch Stress Intensity Factor to the Cracks Emanating From Notches. Elsevier Science Ltd, 2002.
http://dx.doi.org/10.1007/978-94-010-0608-8_24
G. C. Sih and F. Erdogan, On the crack extension in plates under plane loading and transverse shear, J. Basic Eng.,1963.
http://dx.doi.org/10.1115/1.3656897
Stroh, La rupture des matériaux, in D. Francois and L. Joly (Ed.), Masson and Co, Paris,1972.
El Hadim. Stress triaxiality to evaluate the effective distance in the volumetric approach in fracture mechanics. Journal of Mechanical and Civil Engineering, pp.21-26, 2011.
http://dx.doi.org/10.9790/1684-11642126
Al Gaoudi, O., El Minor, H., Hilali, E., El Minor, H., Bahraoui, I., Pluvinage, G., Azari, Z., Critical Notch Stress Intensity Factor Concept for Pure Mode II, (2014) International Review of Mechanical Engineering (IREME), 8 (3), pp. 524-529.
El-Hadim, B., Ei-Minor, H., El-Hilali, M., Fracture toughness transferability in pipe with external oriented defect, (2011) International Review of Mechanical Engineering (IREME), 5 (5), pp. 804-811.
O. Zebri. H. El Minor, A. Bendarma. Plastic zone and effective distance under mixed mode fracture -Volumetric approach-. Journal of Mechanical and Civil Engineering - ISOR Journals, Vol.13, (Mar- Apr. 2016), pp 57-63.
El minor H., Kifani A., Louah M., Azari Z., Pluvinage G.,Fracture toughness of high strength steel—using the notch stressintensity factor and volumetric approach. Structural safety,2003,vol. 25, no 1, p. 35-45.
http://dx.doi.org/10.1016/s0167-4730(02)00038-3
O. Akourri, I. Elayachi, G. Pluvinage, Stress Triaxiality as Fracture Toughness Transferability Parameter for Notched Specimens, (2007) International Review of Mechanical Engineering (IREME), 1 (6), pp. 675-682.
G. Pluvinage, Fracture and Fatigue Emanating from stress concentrators (Dordrecht: Kluwer Academic Publishers; 2003)
http://dx.doi.org/10.1007/1-4020-2612-9
Alshoaibi, A., Ariffin, A., Finite Element Modeling of Fatigue Crack Propagation Using a Self Adaptive Mesh Strategy, (2015) International Review of Aerospace Engineering (IREASE), 8 (6), pp. 209-215.
http://dx.doi.org/10.15866/irease.v8i6.8823
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