Dynamic Load on a Pipe Caused by Acetylene Detonations – Experiments and Theoretical Approaches

Sperber, A.; Schildberg, Hans‐Peter; Schlehlein, Steven

doi:10.1155/1999/503961

Cited by 13 publications

(7 citation statements)

References 4 publications

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“…They present dynamic amplification factors derived from experimentally determined strains. Sperber et al [8] measured strains produced in a thick-wall tube by an acetylene decomposition detonation. They noted that the peak strains were underpredicted by a factor of up to 4 when static formulas were used to estimate the maximum deformation.…”

Section: Structural Responsementioning

confidence: 99%

Linear Elastic Response of Tubes to Internal Detonation Loading

Beltman

Shepherd

2002

Journal of Sound and Vibration

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This paper deals with the structural response of a tube to an internal gaseous detonation. An internal detonation produces a pressure load that propagates down the tube. Because the speed of the gaseous detonation can be comparable to the flexural wave group speed, excitation of flexural waves in the tube wall must be considered. Flexural waves can result in much higher strains and stresses than static loading with the same loading pressures. Experiments and numerical simulations were used to determine the structural response. In the experiments, a detonation tube was instrumented with a number of strain gages. A series of experiments was carried out under different conditions. Strains were measured that exceeded the equivalent static strain by up to a factor of 3Á9: Special attention was paid to the influence of the detonation speed, reflection and interference of structural waves at flanges and also at the tube end, the linearity of the response, the transient development of the deflection profile, and the influence of detonation cell size. Analytical models and finite element models were used to interpret the observations and to make quantitative predictions of the peak strain. #

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Section: Structural Responsementioning

confidence: 99%

Linear Elastic Response of Tubes to Internal Detonation Loading

Beltman

Shepherd

2002

Journal of Sound and Vibration

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“…They present dynamic amplification factors derived from experimentally determined strains. Sperber et al [47] measured strains produced in a thick wall tube by an acetylene decomposition detonation. They noted that the peak strains were under-predicted by a factor of up to 4 when static formulas were used to estimate the maximum deformation.…”

Section: Methodsmentioning

confidence: 99%

Structural Response of Piping to Internal Gas Detonation

Shepherd

2006

Volume 4: Fluid Structure Interaction, Parts a and B

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Detonation waves in gas-filled piping or tubing pose special challenges in analysis and prediction of structural response. The challenges arise due the nature of the detonation process and the role of fluid-structure interaction in determining the propagation and arrest of fractures. Over the past ten years, our laboratory has been engaged in studying this problem and developing methodologies for estimating structural response. A brief overview of detonation waves and some key issues relevant to structural waves is presented first. This is followed by a summary of our work on the elastic response of tubes and pipes to ideal detonation loading, highlighting the importance of detonation wave speed in determining flexural wave excitation and possibility of resonant response leading to large deformations. Some issues in measurement technique and validation testing are then presented. The importance of wave reflection from bends, valves and dead ends is discussed, as well as the differences between detonation, shock wave, and uniform internal pressure loading. Following this, we summarize our experimental findings on the fracture threshold of thin-walled tubes with pre-existing flaws. A particularly important issue for hazard analysis is the estimation of loads associated with flame acceleration and deflagration-to-detonation transition. We give some recent results on pressure and elastic strain measurements in the transition regime for a thick-wall piping, and some remarks about plastic deformation.

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“…by Sperber et al [9], and extending that to the analysis of thick-wall tubes [10]. Moreover, a modified Tang's model was proposed by Mirzaei et al [11,12] in order to develop a transient analytical model for tubes with finite lengths.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

On the vibrational responses of thin FGM tubes subjected to internal sequential moving pressure

Malekan

Khosravi

Zanin

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Dynamic load in tubes due to detonation has plenty of applications such as the oil pipeline system and pulse detonation engine. Various experimental, analytical, and numerical investigations have been made to study the elastic-dynamic behaviors of tubes under internal moving pressure, with few studies dedicated to elastic-plastic analysis of this kind of problem. The investigation of elastic-plastic response of a tube made of homogeneous and nonhomogeneous (functionally graded material-FGM) materials subjected to the internal moving pressure (gaseous detonation) is the specific objective of this study. FGM is a newly well-established type of composite materials that its material contents are varying gradually along a user-defined direction. In this work, the effect of non-homogeneity on the vibrational response of the tube was studied using an axisymmetric FE model, which developed by Abaqus ® commercial package accompanied by VUMAT, VDLOAD, and VUSDFLD user-written subroutines. Different detonation load velocities were considered based on the tube material properties, i.e., according to the critical velocities. The presented results showed that the variation of stress/strain fields against time was affected by the gradation of FGM material. In addition, FGM material can help to withstand against the detonation loads, specifically when there are multiple sequential detonations or a high-pressure detonation load.

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Dynamic Load on a Pipe Caused by Acetylene Detonations – Experiments and Theoretical Approaches

Cited by 13 publications

References 4 publications

Linear Elastic Response of Tubes to Internal Detonation Loading

Linear Elastic Response of Tubes to Internal Detonation Loading

Structural Response of Piping to Internal Gas Detonation

On the vibrational responses of thin FGM tubes subjected to internal sequential moving pressure

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