Limit velocity of fracture front and dynamic strength of brittle solids

Nikolaevskiĭ, V. N.

doi:10.1016/0020-7225(81)90048-3

Cited by 29 publications

(13 citation statements)

References 26 publications

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“…These advancing failure zones are referred to as a failure wave. The first mention of the concept of a "failure wave" apparently occurs in Russian publications dating from the 1960s, such as Galin et al (1966), Nikolaevskii (1981), and Cherepanov (1979), where "selfpropagating failure fronts" are discussed. Figure 51.…”

Section: Failure Fronts Produced By Projectile Impactmentioning

confidence: 99%

A Study on the Feasibility of Creating a Web-Accessible Marine Mammal Sound Library Based upon the Collections at the Woods Hole Oceanographic Institution

Daher¹

2008

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, ARL-SR-0164 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)10. SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTSince 1954, the Sagamore Army Materials Research Conferences has brought together scientists and engineers from government, industry, and academia for in-depth discussions of cutting edge materials technology issues of critical importance to the U.S. Army community. The 46th Sagamore Army Materials Research Conference continued this tradition with a focus on "Advances and Needs in Multi-Spectral Transparent Materials Technology." Held at the Harbourtowne Golf Resort and Conference Center, St. Michaels, MD, on May 9-12, 2005, the objective of this conference was to review the applications, requirements, and major technical barriers of multi-spectral transparent materials for sensor protection, ground and air vehicle ballistic protection, personnel protection, and infrastructure survivability. The conference proceedings, documented in this report, included presentation media along with selected papers and supporting content that highlight the performance and capabilities requirements of the embedded Army systems in Current and Future Forces. The multi-spectral transparent materials technology needs include transparent armor, phased array radar, displays, electromagnetic windows and domes, and polycrystalline lasers. The presentations focus on processing, characterization, property testing, and system requirements of advanced ceramic and polymer systems to enable the cost-effective manufacturing of high quality, reproducible materials for these applications. These proceedings demonstrate both the effective communication of critical technology needs within the industrial community as well as continued opportunities for advancement of these technologies for military applications. SUBJECT TERMS

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Section: Failure Fronts Produced By Projectile Impactmentioning

confidence: 99%

A Study on the Feasibility of Creating a Web-Accessible Marine Mammal Sound Library Based upon the Collections at the Woods Hole Oceanographic Institution

Daher¹

2008

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“…In essence, the failure wave is characterized by the moving damage or fracture of material presented by the microcrack system on a mesoscopic scale. So it is also called after fracture front [14] or fracture wave [15] . The microcracks result in dilation due to discontinuous gaps.…”

Section: Progressive Fracture Model Of the Failure Wavementioning

confidence: 99%

Progressive fracture modeling of the failure wave in impacted glass

Yao

Zhan-fang

Huang

2006

Acta Mech. Solida Sin.

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The failure wave has been observed propagating in glass under impact loading since 1991. It is a continuous fracture zone which may be associated with the damage accumulation process during the propagation of shock waves. A progressive fracture model was proposed to describe the failure wave formation and propagation in shocked glass considering its heterogeneous meso-structures. The original and nucleated microcracks will expand along the pores and other defects with concomitant dilation when shock loading is below the Hugoniot Elastic Limit. The governing equation of the failure wave is characterized by inelastic bulk strain with material damage and fracture. And the inelastic bulk strain consists of dilatant strain from nucleation and expansion of microcracks and condensed strain from the collapse of the original pores. Numerical simulation of the free surface velocity was performed and found in good agreement with planar impact experiments on K9 glass at China Academy of Engineering Physics. And the longitudinal, lateral and shear stress histories upon the arrival of the failure wave were predicted, which present the diminished shear strength and lost spall strength in the failed layer.KEY WORDS the failure wave, progressive fracture model, glass, planar impact

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“…Cherepanov finds that self propagating stable waves move at the bulk sound speed, but if the dissipation energy criterion is not fulfilled, unstable failure waves having lesser speeds may still exist. Another frequently cited Russian reference (Finkel, 1970), says 0.5 CL < CF <0.9CT • The fracture fronts observed by Senf et al (1988) in glass propagated at 4.6 mml p,s, which is 0.8C L or 2.3C T • Nikolaevski (1981) in an extended, although qualitative, discussion offailure waves assumed C F = CR. While not specifying the limit, Janach (1976) also emphasized that brittle materials can only fracture at a limiting velocity.…”

Section: Fracture Frontsmentioning

confidence: 99%

“…(1992), and Bless, et aI., (1992) hypothesize a failure that starts at an interface in a highly stressed unfailed material, and then propagates at a characteristic rate. Nikolaevski (1981), and Grady (1993) hypothesize a fracture process that is initiated at the compression wave front, but involves some sort of incubation process that causes the fracture to lag the stress wave front.…”

Section: Fracture Frontsmentioning

confidence: 99%