Dynamic properties of ceramic materials

Grady, D. E.

doi:10.2172/72964

Cited by 60 publications

(47 citation statements)

References 13 publications

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“…Spall strengths of boron carbide from the investigations of Winkler and Stilp (1992) are shown in Figure 5. This figure shows that the values of spall threshold reported by Winkler and Stilp are consistently higher than those found in the present work and reported by Grady (1995). This is the case even when one takes into account errors associated with the values of 1/2 Aupb.…”

Section: Spall Experimentssupporting

confidence: 60%

“…The values of the measured elastic wave velocities and derived elastic constants of boron carbide materials used by different investigators are similar except for the values of bulk moduli (263 GPa) and Poisson's ratios (0.241) reported by Wilkins (1968). Further, the values of sound wave velocities, and consequently, the values of elastic moduli for nearly fully dense boron carbide manufactured by Dow Chemical reported by Brar et al (1992) are consistently smaller than the values of respective elastic parameters by Grady (1995). Lacking information about the technique used to measure the elastic wave velocities and the errors associated with these measurements, the reported systematic difference in the values of elastic properties of nearly fully dense boron carbide materials is hard to understand and explain.…”

Section: Materials and Their Propertiessupporting

confidence: 52%

“…Effect of pulse width on spall threshold of B4C. Winkler and Stilp (1992) and Grady (1995) have measured the spall strengths of boron carbides. The source of the material used in the investigation of Winkler and Stilp is unknown.…”

Section: Spall Experimentsmentioning

confidence: 99%

“…Shock Hugoniot of boron carbide has been investigated by Wilkins (1968), Gust and Royce (1971), McQueen et al (1970), Pavlovskii (1971), and Marsh (1980). Later Kipp and Grady (1989) and Grady (1995) reported shock and release response of two different boron carbides manufactured by Eagle Pitcher and Dow Chemical, respectively. Recently, Grady (1999) re-analyzed the shock compression data on boron carbide manufactured by Eagle Pitcher and Dow Chemical.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the data from the investigation of McQueen et al (1970) is not included in this work. Grady (1995) also performed a limited number of experiments to measure spall strength of boron carbide manufactured by Dow Chemical. Winkler and Stilp (1992) reported spall strength of hot-pressed boron carbide.…”

Section: Introductionmentioning

confidence: 99%

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Shock Response of Boron Carbide

Dandekar¹

2001

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Boron carbide is of interest because of its potential application in protective systems both for personnel and structures. Therefore it is necessary to determine its mechanical response when subjected to impact loading. The present work was undertaken to determine tensile/spall strength of boron carbide under plane shock wave loading and to analyze all available shock compression data on boron carbide materials obtained from different sources. The principal conclusions are: (1) the tensile/spall strength of boron carbide when shocked between 2 and 15 GPa is 0.35 ± 0.07 GPa, (2) the existing shock compression data indicates that boron carbide tends to suffer a gradual loss of its shear strength as the magnitude of shock stress exceeds its Hugoniot Elastic Limit (HEL), i.e., 15-20 GPa, (3) the underlying reason or reasons for the inferred loss of shear strength under plane shock wave compression remains to be investigated, and (4) a general equation of state for boron carbide in its ambient phase is formulated which can adequately represent its hydrodynamic compression up to a strain of 0.25, i.e., to a maximum stress around 70 GPa.u

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Section: Spall Experimentssupporting

confidence: 60%