Article Preview. Abstract: Structural integrity and service reliability depend on the fracture resistance of a material. Add to Cart. Materials Science Forum Volume Main Theme:. Research Trends in Contemporary Materials Science. Edited by:. Dragan P. Online since:. September Cited by. Related Articles. Paper Title Pages.
Authors: Li Yun Li, F. Che, D. Abstract: Multi-crack problems are deeply involved in rock-like material and rock engineering. In order to study the influences of lateral stress and inclined crack angle on the failure load of the multi-cracked body, uniaxial and biaxial compression fracture tests are conducted on plate specimens with regular distributed multi-cracks. And the multi-cracked specimens will hardly initiate propagation under equal biaxial compression. Abstract: A two-parameter constraint-based fracture mechanics approach is used to explain the effect of the constraint on the apparently anomalous behavior of short fatigue cracks.
The different levels of stress constraint are quantified by the T-stress, and microstructurally as well as mechanically short cracks are discussed. Narashiman, and R. Donne, C. Pirondi, and A. Topper, D. Duquesnay, and M. Pompetzki , Crack closure, damage and short crack growth under variable amplitude loading in preceding of theoretical concepts a numerical analysis of fatigue , pp. Robin, M. Busch, M. Chergul, H. Lieurade, and G.
Pluvinage , Influence of series of tensile and compressive overloads on L crack growth in: Fatigue crack growth under variable-amplitude loading. Cheng and K. Christensen , Fatigue crack, fatigue damage and their detection. Schijve and D. Broek , The result of a test program based on a gust spectrum with variable amplitude loading , Aircraft Engineering , pp. Jones , Fatigue crack growth retardation after single-cycle peak overload in Ti-6Al-4V titanium alloy , Engineering Fracture Mechanics , vol. Paris, R. Bucci, E. Wessel, W. Clark, and T.
Mager , Extensive study of low fatigue crack growth rates in A and A steels, In: Stress analysis and crack growth , pp. Schijve , Fatigue damage accumulation and incompatible crack front orientation , Engineering Fracture Mechanics , vol. Minakawa and A. Mcevily , On crack closure in the near-threshold region , Scripta Metallurgica , vol.
Vasudevan and K. Sadananda , Classification of fatigue crack growth behaviour , Metallurgical and Materials Transaction A , pp.
Product | Elastic-plastic Mixed-mode Fracture Criteria and Parameters
Lu , Study of residual welding stress using the step-by step hole drilling and X-ray diffraction method Welding in the World , pp. Lee, C. Chung, and Y. Park , Effects of redistributing residual stress on the fatigue behavior of ss weldment , International Journal of Fatigue , vol. Lieurade , Effect of residual stresses and stress ratio on the fatigue strength of welded components. Welding in the World , pp.
Masubuchi and D. Et-martin , Investigation of residual stresses by use of hydrogen cracking , Welding Journal , vol. Tanaka , Fatigue crack propagation from a crack inclined to the cyclic tensile axis , Engineering Fracture Mechanics , vol. Makhutov , Deformation criteria of fracture and calculation elements structure strength , Recho , The mixed-mode experimental investigation of the fatigue crack in CTS metallic specimen.
Brown and K. Miller , Initiation and growth of cracks in biaxial fatigue. Ueda, K. Ikeda, T.
Yao, and M. Aoki , Characteristics of brittle fracture under general combined modes including those under biaxial tensile loads , Engineering Fracture Mechanics , pp. Yokobori, A. Otsuka, and T. Takahashi , Fracture of Solids , Jeng and S. Shah , Mixed-mode fracture of concrete , International Journal of Fracture , pp. Sih , Some basic problems in fracture mechanics and new concepts , Engineering Fracture Mechanics , vol. Sih and B. Barthelemy , Mixed mode fatigue crack growth predictions , Engineering Fracture Mechanics , vol. Theocaris and G. Papadopoulos , The distribution of the elastic strain-energy density at the crack tip for fracture modes I and II , International Journal of Fracture , vol.
Zhang, J. Li, and N. Recho , Numerical and experimental analysis of fatigue crack growth in elastic-plastic materials. Lemaitre, J. Chaboche, C. Bathias, J. La et al. Qian and A. Fatemi , Mixed mode fatigue crack growth: A literature survey , Engineering Fracture Mechanics , vol.
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Charng , Estimation of plasticity-induced crack closure in a pre-existing plastic zone , International Journal of Fatigue , vol. Marci , The?? Keff-concept: A unique and complete description of fatigue crack propagation , Engineering Fracture Mechanics , vol. Donald and C. Wallhead and L. Edwards , A study of crack closure using the optical method of caustics and consequences for the use of K eff as a fatigue crack driving force. Engineering Frature Mechanics , pp. Ma, J. Li, S. Ma et al. The gradients of the curve for 15, o crack length of about 3 mm, the crack was 30 and 60 angles are similar due to the same propagated by increasing loads.
The occurs at decreasing loads. If the crack length is fracture started at different stresses for each larger than 10 mm, load causing crack is smaller loading angle, where a larger loading angle o o for the 30 and 60 loading angles compared requires bigger stress to fracture. The results of o to the 15 loading angle. This behavior is in stress-strain at fracture are tabulated in Table 2. Conclusions Figure 8 shows the J-integral versus load o o o for 15 , 30 and 60 loading angles from the The important conclusions of this work are initial crack.
Crack summarized below. The deformed surface of a notch in a Jc as shown in Figure 7. The maximum load is ductile material subjected to mixed-mode o o about N for 15 , 1, N for 30 and 1, N combination of modes I and II loading o for 60 loading angles.
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The loads mentioned shows blunting along a certain portion and above are the resultant value of horizontal and sharpening of the notch becomes very acute. Increasing Fy means increasing 2. It could be concluded that, the ligaments occurs by propagation of mode II dominated crack requires lower load a shear crack. This is caused by an compared to mode I dominated crack.
Stress-strain at fractured.
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Loading angle Stress Strain degree MPa 15 1, 0. Result for loading at 15 , 30 and o 60 angles from the experiment. Result from simulation for loading at 30 and 60 angles. Notch tip upper o o Coordinate Y mm 15 3. This trend has been o o o Figure 6. Crack path for 15 , 30 and This research has successfully modeled Load N the crack growth behavior from a rectangular notch of ductile material where it is assumed to exhibit elastic-plastic behavior. The J-integral is successfully used for mixed mode fracture and 0 maximum principle stress is a good crack 0 2 4 6 8 10 12 14 16 propagation direction criterion.
Crack length mm Figure 7. Load versus crack length. References Dsekmann, P. Elastic plastic crack analysis under mixed mode loading conditions. International J-Integtal Journal of Fracture, Maximum tensile stress criterion. Journal of Basic Engineering, Ghosal, A. International Journal of Figure 8. J-intergral versus load. Fracture, Engineering Fracture 1, 1, Mechanics, Structural life assessment 0.