Analysis of the Dynamic Response of a Controlled Detonation Chamber

Simoens, B.; Lefebvre, M.; Nickell, Robert E.; Minami, Fumiyoshi; Asahina, Joseph K.

doi:10.1115/1.4003469

Cited by 6 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All previous conclusions are also in good agreement with numerical simulations [7]. Numerical simulations with Ansys Autodyn R [8] showed that the influence of the charge shape depends on the distance from the charge.…”

Section: Influence Of the Charge Shapesupporting

confidence: 84%

Dynamic response of a detonation vessel

Simoens

Lefebvre

Minami

2012

WIT Transactions on the Built Environment

Self Cite

View full text Add to dashboard Cite

Detonation vessels are used for a wide range of applications. They are generally designed for a specific use and are built to withstand the impulse induced by the detonation of a given maximum mass of explosive. In general however, the characteristics of the explosive charge however are not specified. It is assumed to be spherical and is usually expressed as a TNT-equivalent mass of explosive. Extensive testing of various explosive charges in a small scaled cylindrical vessel has led to several important recommendations for a better (more rational) use of impulsively loaded vessels. The shape of the explosive charge has been shown to be crucial in the loading on the vessel wall: peak deformations can vary by a factor of two with varying charge shape. A "worst case" charge shape can be found for every vessel. Experiments have shown as well the large benefit of splitting one large charge into two half charges separated by a certain distance: the vessel response is significantly reduced in the latter case. Changing the charge location in a cylindrical vessel for different shots also allows to extend the vessel lifetime by spreading the location of largest deformation over a large area of the vessel wall instead of concentrating the impulse on the same location for every shot. Finally no major influence of the location of the initiation of the charge has been observed.

show abstract

Section: Influence Of the Charge Shapesupporting

confidence: 84%

Dynamic response of a detonation vessel

Simoens

Lefebvre

Minami

2012

WIT Transactions on the Built Environment

Self Cite

View full text Add to dashboard Cite

show abstract

“…Without considering the effect of multiple convergence and reflection of shock wave, the impact load on the vessel wall is simplified as triangular wave pulse ( ) uniformly distributed on the inner wall of the vessel [14]. Where:…”

Section: Numerical Simulation Of Cylindrical Shells With Different Ramentioning

confidence: 99%

Numerical simulation of the effect of flange radial length on strain growth of cylindrical containment vessels

Hu¹,

Gu²,

Liu³

et al. 2019

Vib. proced.

View full text Add to dashboard Cite

In this paper, the effect of radial length of flange on the strain growth in the elastic range of the cylindrical shell is studied by numerical simulation using LS-DYNA. It is found that the influence of the flange length on the first strain peak is small. As the radial length of the flange increases, the bending disturbance of the various frequencies of the cylindrical shell is excited which makes the linear modal coupling response is enhanced, so that the strain growth factor is increased. When more high-frequency parts are introduced into the strain response, the strain growth time will be correspondingly shortened. Therefore, it is recommended to use a flange as small as possible when designing the explosion containment vessel.

show abstract

“…One reason for this is the lack of full-field cyclic displacement and strain information that will convince designers to adopt shakedown criteria as a safe-state beyond first-yield, which is the focus of this article. Notable exceptions where shakedown designs are utilized include: vessels for demilitarization of munitions [8,9], tribology [10][11][12], multilayer semiconductor devices [13], pavement design [14,15], shape memory alloy components [16,17], and nuclear pressure vessels [1][2][3][4][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Ambient multiaxial creep: shakedown analysis of structures using stereo digital image correlation

2020

View full text Add to dashboard Cite

A new framework to utilize stereo-vision digital image correlation (DIC) as a means of identifying the multiaxial cyclic shakedown behavior of structures is demonstrated on high strength steel bars. AISI 1144 carbon steel cylindrical bars are subjected to cyclic tension with nonzero mean stress and constant torque under ambient conditions. An elastic analytical solution is used in a post-processing procedure to extract inelastic strains and estimate the accumulated inelastic strain during cycling. DIC results are used to understand the cyclic strain evolution and determine if the accumulation of plastic strain stabilizes (shakedown). The results are used to construct a load interaction diagram (Bree Diagram) that displays the loading combinations resulting in purely elastic, safe shakedown, and undesirable cyclic inelastic behavior. The manifestation of ambient creep, during the multiaxial cyclic loading, is demonstrated through dedicated experiments. The shakedown criteria has been adapted to account for the ambient creep behavior. Depending on target structural lifetimes and allowable total strains, it is found that the design space can be enhanced by allowing shakedown to occur. An illustration is given for which the design space is enlarged 1.25 times the typical yield-limited approach.

show abstract

Analysis of the Dynamic Response of a Controlled Detonation Chamber

Cited by 6 publications

References 7 publications

Dynamic response of a detonation vessel

Dynamic response of a detonation vessel

Numerical simulation of the effect of flange radial length on strain growth of cylindrical containment vessels

Ambient multiaxial creep: shakedown analysis of structures using stereo digital image correlation

Contact Info

Product

Resources

About