Dynamic fracture analysis of crack–defect interaction for mode I running crack using digital dynamic caustics method

Yang, Renshu; Xu, Peng; Yue, Zhongwen; Cheng, Chuan

doi:10.1016/j.engfracmech.2016.04.042

Cited by 54 publications

(20 citation statements)

References 29 publications

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“…Koivisto et al [7] and Fender et al [8] conducted further studies on such phenomenon and revealed the cause of these crack interactions using a simple geometric model. Yang et al [9] noted that when a running crack traverses hole-like defects with different diameters, the stress intensity factor and propagation velocity of the running crack change proportionally.…”

Section: Introductionmentioning

confidence: 99%

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Hole Defects Affect the Dynamic Fracture Behavior of Nearby Running Cracks

Yang

Ding

et al. 2018

Shock and Vibration

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Effects of defects on the dynamic fracture behavior of engineering materials cannot be neglected. Using the experimental system of digital laser dynamic caustics, the effects of defects on the dynamic fracture behavior of nearby running cracks are studied. When running cracks propagate near to defects, the crack path deflects toward the defect; the degree of deflection is greater for larger defect diameters. When the running crack propagates away from the defect, the degree of deflection gradually reduces and the original crack path is restored. The intersection between the caustic spot and the defect is the direct cause of the running crack deflection; the intersection area determines the degree of deflection. In addition, the defect locally inhibits the dynamic stress intensity factor of running cracks when they propagate toward the defect and locally promotes the dynamic stress intensity factor of running cracks when they propagate away from the defect.

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Section: Introductionmentioning

confidence: 99%

“…Many experimental studies have been carried out on the dynamic mechanical behavior of materials and structures [5][6][7][8][9][10][11][12][13]. Zhang and Zhao [5] carried out a semidisc dynamic three-point bending test with impact loading.…”

Section: Introductionmentioning

confidence: 99%

Hole Defects Affect the Dynamic Fracture Behavior of Nearby Running Cracks

Yang

Ding

et al. 2018

Shock and Vibration

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“…Bouja et al formed an energy balance equation involving the energy dissipated in a viscoelastic strip. Yang et al studied the interaction mechanism between crack defects by experimental and numerical methods and found the quantitative dynamic stress intensity factor under crack propagation speed. By studying the damage and dissipation process in dynamic failure of organic glass, Dalmas et al evidenced a critical velocity, along which failure switches from nominally brittle to quasi‐brittle.…”

Section: Introductionmentioning

confidence: 92%

“…Kanninen et al analysed the ductile fracture of a cylinder shell via dynamic fracture mechanics, obtaining a one‐dimensional expression of pipeline crack propagation. Four assumptions were made during the analytic process: Radial displacement

\overset{w}{true}

was of main concern; the pressure distribution along the circumference can be ignored; crack opening displacement was equal to the integration from any position of the cross section in the crack region to radial displacement

\overset{w}{true}

along the circumference; and the crack tip plastic region distributed on the back of the crack tip. On the basis of these four assumptions, the expression consistent with the limiting crack propagation equation was obtained.…”

Section: Introductionmentioning

confidence: 99%

“…In summary, several studies research on high‐level steel, only limited to crack arrest distance and fracture toughness relationship, failed to consider the effect of the hardening coefficient and the hardening index on crack propagation velocity, without considering the influence of high‐grade ductile hardening growth velocity role under the role of energy release rate.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of unstable crack propagation velocity for X80 pipeline steel

Dong

Zhang

et al. 2018

Fatigue Fract Eng Mat Struct

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Unstable crack propagation velocity following the failure of pipeline steel has always been a problem. In this study, differences between the existing unstable crack propagation calculation models were analysed, and the deficiencies within the crack propagation velocity models were overcome. The hardening coefficient and hardening index of the ductile material were considered, and a velocity model of unstable crack propagation of pipelines based on the Hutchinson‐Rice‐Rosengren (HRR) theory elastic‐plastic stress‐strain field and the displacement field was established. Consequently, the limit propagation velocity was obtained. In full‐scale burst test, the pipe with diameter of 1422 mm was chosen to simulate the natural gas pipeline transportation environment. Compared with the theoretical result, the error was limited in 13%. The research result solved the problem of quantifying the propagation velocity of the crack in X80 pipeline, which was significant for describing the forecast of velocity and length of unstable propagation and failure characteristics of pipelines.

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High-Speed Photography and Digital Optical Measurement Techniques for Geomaterials: Fundamentals and Applications

et al. 2017

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Geomaterials (i.e., rock, sand, soil and concrete) are increasingly being encountered and used in extreme environments, in terms of the pressure magnitude and the loading rate. Advancing the understanding of the mechanical response of materials to impact loading relies heavily on having suitable high-speed diagnostics. One such diagnostic is high-speed photography, which combined with a variety of digital optical measurement techniques can provide detailed insights into phenomena including fracture, impact, fragmentation and penetration in geological materials. This review begins with a brief history of high-speed imaging. Section 2 discusses of the current state-of-the-art of high-speed cameras, which includes a comparison between Charge-Coupled Device (CCD) and Complementary Metal-Oxide-Semiconductor (CMOS) sensors. The application of high-speed photography to geomechanical experiments is summarized in Section 3. Section 4 is concerned with digital optical measurement techniques including photoelastic coating, Moiré, caustics, holographic interferometry (HI), particle image velocimetry (PIV), digital image correlation (DIC) and infrared thermography (IRT), in combination with highspeed photography to capture transient phenomena. The last section provides a brief summary and discussion of future directions in the field.

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Dynamic fracture analysis of crack–defect interaction for mode I running crack using digital dynamic caustics method

Cited by 54 publications

References 29 publications

Hole Defects Affect the Dynamic Fracture Behavior of Nearby Running Cracks

Hole Defects Affect the Dynamic Fracture Behavior of Nearby Running Cracks

Experimental study of unstable crack propagation velocity for X80 pipeline steel

High-Speed Photography and Digital Optical Measurement Techniques for Geomaterials: Fundamentals and Applications

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