...Yuxuan Xiao; Shuhong Dai; Yao Wu A method for determining the mode I stress intensity factor based on the symplectic geometry method is proposed. A fan-shaped region is constructed at the crack tip, and the full state vector of the crack tip is determined with the symplectic geometry method...

...Marlies Lambrecht; Johan Schuurmans; Marc Scibetta ASTM E1921-21, Standard Test Method for Determination of Reference Temperature, T0, for Ferritic Steels in the Transition Range , contains a limitation on the stress intensity factor loading rate ( K ˙ ) for the quasistatic loading. The specimens...

..., and the stress intensity factor at the crack tip is the highest; the numerical simulation results of the main crack growth direction and number of triangular, square, and hexagonal charges are basically the same as those of the explosion test, but there is a point in the circular blasthole deviation. 03 11...

... are conducted using caustics and the strain gauge method simultaneously to determine the critical mixed mode stress intensity factors of polymethyl methacrylate (PMMA) specimens. The mixed mode fracture toughness is then derived by employing both methods for a thorough comparison and analysis. Besides, the J...

... of the calculation formula is improved, especially in small thickness regions, as compared with the current standard proposed in 2016 and 2018 by the authors. 04 01 2021 13 04 2021 08 06 2021 crack tip opening displacement small-scale yielding stress intensity factor fracture toughness...

... for crack length values during the tests. The stress intensity factor ( K IC ) as a function of crack length was calculated. Results showed rather close fracture properties for the six mix types. 16 09 2018 21 06 2019 23 07 2019 four-point bending fracture tests digital image...

...S. P. Paruchuru; V. U. Kumar; A. Jain; X. N. Dong Measurement of a stress intensity factor using a compact sandwich specimen involves other material properties such as elastic moduli and Poisson’s ratios of interlayer and holder materials, and therefore it affects uncertainty. No attempt was made...

...H. Sarangi; K. S. R. K. Murthy; D. Chakraborty Determination of accurate mixed mode stress intensity factors forms the basis for the understanding and analysis of mixed mode fracture. In this context, experimental methods for the measurement of stress intensity factors (SIFs) play a vital role...

...Yifan Huang; Wenxing Zhou Three-dimensional (3D) finite element analyses (FEA) of clamped single-edge tension (SE(T)) specimens were performed to investigate the effective thickness used in the calculations of the stress intensity factor ( K ) and plastic eta factor-based J- integral ( J ). The SE...

...Wenfeng Hao; Can Tang; Yanan Yuan; Yinji Ma The interaction between different shapes of inclusions and the mode I matrix crack was studied experimentally using the photoelasticity method. First, the stress intensity factor (SIF) at the matrix crack tip in the neighborhood of the inclusions...

...Xiangqiao Yan; Chengqing Miao This paper deals with elliptical hole-crack problems in an infinite plate subjected to internal pressure by using a hybrid displacement discontinuity method (a boundary element method). Numerical results of the stress intensity factors (SIFs) are given. Especially...

... 2009 16 03 2010 13 04 2010 stress intensity factor boundary element crack-tip element displacement discontinuity References Bowie , O. L. , “ Analysis of an Infinite Plate Containing Radial Cracks Originating at the Boundary of an Internal Circular Hole ,” J. Math...

...Xiangqiao Yan By using the hybrid displacement discontinuity method (a boundary element method) proposed recently by the author, in this note a new numerical analysis is presented for the stress intensity factors (SIFs) of rectangular tensile sheet with single edge crack. The new numerical results...

...Xiangqiao Yan This paper is concerned with the stress intensity factors (SIFs) of a rectangular plate with symmetric edge cracks and edge half-circular-hole cracks in tension (see Figs. 1 and 2) by using the displacement discontinuity method with crack-tip elements (a boundary element method...

... to be evaluated by the effective stress intensity factor range after 0.2 mm of crack growth from the notch root. References Ward-Close , C.M. , Blom , A.F. , and Ritchie , R.O. , “ Mechanisms Associated with Transient Fatigue Crack Growth Under Variable-Amplitude Loading: An Experimental...

...N-A Noda; B Liang In this study, stress intensity formulas are considered in terms of the square root of area parameter to evaluate arbitrary shaped defects or cracks in the vicinity of an interface. Here “area” is the projected area of the defect or crack. Stress intensity factors...

... of required cycles is measured. 03 06 2004 13 10 2005 22 03 2006 stress intensity factor critical crack length inelastic stresses alternative theory of fracture mechanics fatigue crack propagation References Griffith , A. A. , “ The Phenomena of Rupture and Flow...

... fracture toughness stress intensity factor J -integral blunt-notched samples toughness assessment References de Vedia , L. A. , “ Mecánica de Fractura ,” Monografía Tecnológica Proyecto Multinacional de Investigación y Desarrollo de Materiales OEA-CNEA , Buenos Aires, Argentina , 1986...

... to the phenomenon of acoustoelasticity, such effects produce a variation in ultrasonic wave propagation velocity. From measurement of the wave propagation time within the material it is possible to calculate directly the stress intensity factors K I and K II , even in the case of mixed mode. The typical measurement...

... ,” International Journal of Fatigue   0142-1123 , Vol. 4 , 1980 , pp. 55 – 60 fatigue precracking stress intensity factor stress intensity factor range maximum load load stepdown limit load criterion three-point bend test specimen compact tension test specimen 06 01 1997 02 03 1998...