A Simplified Method for Distribution Design of Explosive Rods to Simulate Cosine-Distributed Impulse on Cylindrical/Conical Shell

Li, Yu Long; Huang, Han Jun

doi:10.4028/www.scientific.net/amr.108-111.1039

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…The test item is a cylindrical steel shell with the diameter of 265 mm, length of 380 mm and thickness of 4 mm. Nineteen pentaerytritol tetranitrate (PETN) explosive rods (3 mm wide and 0.47 mm thick) were used to generate discrete impulsive loads to simulate the impulse induced by X-ray, which is approximately continuously distributed as a cosine function [21,31]. A layer of RB-55 rubber (2.82 mm thick) and a layer of FM-32 foam rubber (8.14 mm thick) are combined as a buffer to shape the rod-explosive loads to be closer to a cosine distribution.…”

Section: Applicationmentioning

confidence: 99%

Hyperelastic behavior of two rubber materials under quasistatic and dynamic compressive loadings — testing, modeling and application

Yongjian

Chen

et al. 2015

Polimery

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The mechanical properties of two rubber materials, RB-55 rubber and FM-32 foam rubber, were tested under quasistatic and dynamic compressive loadings with a universal testing machine and a nonmetallic split Hopkinson pressure bar (SHPB), respectively. The results show that the hyperelasticity dominates the mechanical characteristics of the both materials. And the strain rate dependencies can be observed over the wide strain rate range from 10-2 s-1 to order 10 3 s-1. But in the rather narrow bands of 10-2-10 0 s-1 and 2 • 10 3-6 • 10 3 s-1 , the strain rate effects are not significant. In order to numerically simulate rod-explosive loading tests where the two rubber materials were used as a combined buffer, the strain rate-independent hyperelastic behaviors at the strain rate of order 10 3 s-1 were characterized by Ogden constitutive models, incompressible for RB-55 rubber and compressible for FM-32 foam rubber, respectively. The numerical prediction of the structural responses agrees very well with the experimental results. This means the testing and modeling are successful.

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Section: Applicationmentioning

confidence: 99%

Hyperelastic behavior of two rubber materials under quasistatic and dynamic compressive loadings — testing, modeling and application

Yongjian

Chen

et al. 2015

Polimery

View full text Add to dashboard Cite

show abstract

“…This is the most direct design method. Furthermore, a simplified method has been proposed by Mao et al [14].…”

Section: Buffermentioning

confidence: 99%

A Rod-Explosive Technique for Testing Structural Responses Induced by X-Ray Blow-Off Impulses

Deng

et al. 2010

AMM

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When a structure is irradiated by a pulsed cold X-ray with high energy density, the instantaneous deposition of energy will induce melting, vaporization, and sublimation of the outer layer of material(s). As a result, the material(s) will blow off and hence lead to a so-called blow-off impulse. This kind of impulsive load will cause high-level structural responses. In order to investigate the effects, various test simulation techniques, such as the light-initiated high explosive (LIHE) technique, the spray lead at target (SPLAT) technique and the sheet-explosive technique, were developed due to the lack of proper X-ray sources. This paper presents a rod-explosive technique developed from the sheet-explosive technique. In this technique, the main property of the explosive, i.e. the specific impulse, is determined by using a pendulum test facility. The simulation load (equivalent to the cosine-distributed specific impulse on a conical shell induced by X-ray) is designed by load discretization and impulse equivalence. Numerical simulations of structural responses to both X-ray loads and rod-explosive loads were performed for validating the test simulation technique. An application example of testing a complex structure is briefly given in the end. The rod-explosive technique has the features of low costs and rather high fidelities. It provides a new approach for testing the structural responses induced by X-ray blow-off impulses.

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A Simplified Method for Distribution Design of Explosive Rods to Simulate Cosine-Distributed Impulse on Cylindrical/Conical Shell

Cited by 2 publications

References 8 publications

Hyperelastic behavior of two rubber materials under quasistatic and dynamic compressive loadings — testing, modeling and application

Hyperelastic behavior of two rubber materials under quasistatic and dynamic compressive loadings — testing, modeling and application

A Rod-Explosive Technique for Testing Structural Responses Induced by X-Ray Blow-Off Impulses

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