A rod-explosive technique for testing structural responses induced by X-ray blow-off impulses

Yongjian Mao, Hongjian Deng, Yulong Li, Rongjian He, Hongwei Xiao, Xiaohong Yue, Haiying Huang, Qing Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationApplied Mechanics and Mechanical Engineering
Pages72-77
Number of pages6
DOIs
StatePublished - 2010
Event2010 International Conference on Applied Mechanics and Mechanical Engineering, ICAMME 2010 - Changsha, China
Duration: 8 Sep 20109 Sep 2010

Publication series

NameApplied Mechanics and Materials
Volume29-32
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference2010 International Conference on Applied Mechanics and Mechanical Engineering, ICAMME 2010
Country/TerritoryChina
CityChangsha
Period8/09/109/09/10

Keywords

  • Blow-off
  • Conical shell
  • Impulse
  • Structural response
  • X-ray

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