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

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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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Periodical:

Edited by:

Honghua Tan

Pages:

72-77

DOI:

10.4028/www.scientific.net/AMM.29-32.72

Citation:

Y. J. Mao et al., "A Rod-Explosive Technique for Testing Structural Responses Induced by X-Ray Blow-Off Impulses", Applied Mechanics and Materials, Vols. 29-32, pp. 72-77, 2010

Online since:

August 2010

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$35.00

[1] Y.J. Mao, H.J. Deng and R.J. He: Structure & Environment Engineering Vol. 30, No. 2 (2003), pp.55-64.

[2] R.A. Benham, F.H. Mathews and P.B. Higgins: Application of Light-initiated Explosive for Simulating X-ray Blow-off Impulse Effects (SAND-76-9019, 1976).

[3] H.E. Lindberg and Y. Murray: Calibration and Analysis of the SPLAT (Spray Lead at Target) Impulse Simulation Technique (DNA-TR-81-333, 1983).

[4] S.W. Kirkpatrick and B.S. Hohmes: AIAA Journal Vol. 26 (1988), pp.96-103.

[5] H.E. Lindberg and J.D. Colton: Sheet Explosive Simulation for Combined Shock and Structural Response (AFWL-TR-69-124, 1970).

[6] E.A. Witmer, R. W-H. Wu and F. Merlis: Experimental Transient and Permanent Deformation Studies of Impulsively Loaded Rings and Cylindrical Panels, both Stiffened and Unstiffened (AD-A779-485, 1974).

[7] E.A. Witmer, E.N. Clark and H.A. Balmer: Experimental Mechanics Vol. 7 (1967), pp.56-66.

[8] R.L. Bessey and J.C. Hokanson: Simultaneous and Running Impulsive Loading of Cylindrical Shells (AD-A012-268, 1975).

DOI: 10.21236/ada012268

[9] W.G. Rivera, R.A. Benham, B.D. Duggins and T.W. Simmermacher: Explosive Technique for Impulse Loading of Space Structures (SAND-99-3175C, 1999).

[10] T.L. Cost: Dynamic Response of Missile Structures to Impulsive Loads Caused by /uclear Effects Blowoff (AD-A052999, 1976).

[11] G. Dipeso: Cold X-ray Impulse Estimates (UCRL-ID-144153, 2001).

[12] N. Zhou and D.J. Qiao: Material Dynamics under Pulse Beam Radiation (National Defense Industry Press, Beijing, 2002).

[13] X.H. Yue, Y.J. Mao, R.J. He, H.J. Deng and H.W. Xiao, in: Proc. 2002 Conf. Propellant, Explosive and Insensitive Ammo, edited by H.S. Dong, Science Press, Beijing, China (2002).

[14] Y.J. Mao, Y.L. Li and H.J. Huang: Advanced Materials Research Vols. 108-111 (2010), pp.1039-1042.

[15] Y.J. Mao, C.Z. Li, M.L. Wang, X.M. Liu, Y.B. He, R.J. He, Q. Zhou, S.Q. Hu and H.Y. Huang: Journal of Experimental Mechanics Vol. 20, No. Suppl. (2005), pp.114-118.

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