Elastic Response of Thin Spherical Shells to Axisymmetric Blast Loading

Baker, W. E.; Hu, Wang; Jackson, T. R.

doi:10.1115/1.3625185

Cited by 35 publications

(5 citation statements)

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“…A common approach that is used in this research assumes that the train of shock waves is modeled by three consecutive pulses considering that the peak pressure for each consecutive pulse is halved during each reflection (Baker and Kulesz, 1983; Baker et al, 1966; Smith and Hetherington, 1994). The duration of each re-reflected shock wave is assumed to be constant and equal to the duration of the first shock wave, that is, t 0 1 = t 0 2 = t 0 3 = t 0 .…”

Section: Simplified Blast Loadingmentioning

confidence: 99%

On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations

Hernández

Hao

Zhang

2018

Advances in Structural Engineering

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This article presents a comparative study on the effectiveness of ventilation to mitigate blasting effects on chambers subjected to confined detonations of high explosives. The pressure time-history that acts on the chamber walls is described by three components: (1) the first shock wave, (2) the train of re-reflected shock waves, and (3) the gas pressure. The radial response of spherical chambers is described by the radial breathing mode and modeled by an equivalent single degree of freedom system. The three pressure components are considered for the calculation of the maximum ductility ratio, which is obtained from the numerical solution of the single degree of freedom chamber response. It is assumed that openings reduce the gas pressure but they have an insignificant effect on shock waves. The dynamic response of fully and partially confined chambers are calculated and compared. Results show that intermediate/small openings (less than 10% of the surface of the chamber) are ineffective to mitigate the chamber response and damage. The vibratory response of the chamber is susceptible to elastic or plastic resonance but it is not considerably modified by the long-term gas pressure because of its high radial breathing mode frequency, allowing concluding that ventilation is ineffective to reduce the maximum response of spherical chambers subjected to internal high explosive explosion.

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Section: Simplified Blast Loadingmentioning

confidence: 99%

On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations

Hernández

Hao

Zhang

2018

Advances in Structural Engineering

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“…Towfighi and Kundu (2003) include the effect of anisotropy, and Wang et al (2002) consider a thick orthotropic laminated wall. For transient response of spherical shells, Huth (1955), Baker et al (1966), and Evensen and Evan-Iwanowsky (1967), Liu and Qu (1988) treat transient response time dependent loading. Yasuda and Kushida (1984) include nonlinear effects.…”

Section: Introductionmentioning

confidence: 99%

Transient waves in a thin sphere enclosing an acoustic medium from a moving planar pressure discontinuity

El‐Raheb¹

2007

International Journal of Solids and Structures

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Three models are adopted to analyze transient waves in a spherical shell enclosing an acoustic medium from a moving planar pressure discontinuity. The first model is a plane-strain thin ring. The second model is a spherical shell, and the third model is a plane-strain thick ring that modifies the thin ring model to include reflections across the thickness. All models agree that extensional motions of the shell control internal acoustic pressure of the fluid, and that flexural motions modulate average response by a small amplitude high frequency oscillation. The spherical shell model yields a temporary negative pressure opposite to the striking point and a persistent sharp drop in pressure close to the center. Magnitude of transient pressure depends on the separation between the coupled structural resonance and the internal acoustic resonance with pressure release at the boundary.

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“…Since 1950s, lots of work has been done on the research of monobloc spherical and cylindrical ECVs, and many data on their dynamic behavior were obtained [1][2][3][4][5][6]. 5 On the contrary, much less research has been reported on multilayered ECVs.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of discrete multilayered vessels under internal explosion

Jian

Deng

et al. 2006

Combust Explos Shock Waves

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Three discrete multilayered vessels with the same materials and dimensions except for steel ribbon winding angles were fabricated and tested to investigate their dynamic response and fracture characteristics subjected to internal blast loading induced by TNT set at the centers of their cavities. All the vessels were damaged at the cylindrical portion around the explosion center. The results indicate that the vessel with a smaller ribbon winding angle has a better ability to withstand internal explosion and that there are mainly tensile strains along the steel ribbons and compressive strains across the steel ribbons.

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Elastic Response of Thin Spherical Shells to Axisymmetric Blast Loading

Cited by 35 publications

References 0 publications

On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations

On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations

Transient waves in a thin sphere enclosing an acoustic medium from a moving planar pressure discontinuity

Experimental investigation of discrete multilayered vessels under internal explosion

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