On propagation characteristics of shock waves generated under hypervelocity impact

Menglong Liu, Zhongqing Su, Shenfang Yuan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

A numerical simulation model based on Smoothed-Particle Hydrodynamics (SPH) was developed, for modeling a Hypervelocity Impact (HVI) scenario in which an aluminum target plate of 2 mm thickness, was penetrated by an aluminum sphere of 3 mm diameter, at an initial velocity of 4117 m/s. The meshless nature of the SPH algorithm has been demonstrated to overcome the inefficiency of traditional Finite Element Methods (FEM) in tackling large structural distortion problem to warrant the accuracy when handling HVI. With the algorithm, the accordingly generated shock waves under the HVI were captured by calibrating the strains at representative gauging points along the shock wave propagation path, and the signals were examined quantitatively in both the time and the frequency domains, to extract wave signal features. The simulated debris cloud on HVI was observed to match well with both the experiments and simulation results. It has been concluded that in the regions near the impact point, a shock wave with high velocity was produced; as propagation distance increases, the shock waves can be described as the symmetric and antisymmetric plate-guided modes, propagating at distinct velocities, and frequency bands.
Original languageEnglish
Title of host publicationStructural Health Monitoring and Integrity Management - Proceeding of the 2nd International Conference of Structural Health Monitoring and Integrity Management, ICSHMIM 2014
PublisherCRC Press/Balkema
Pages445-450
Number of pages6
ISBN (Print)9781138027763
Publication statusPublished - 1 Jan 2015
Event2nd International Conference of Structural Health Monitoring and Integrity Management, ICSHMIM 2014 - Nanjing, China
Duration: 24 Sep 201426 Sep 2014

Conference

Conference2nd International Conference of Structural Health Monitoring and Integrity Management, ICSHMIM 2014
CountryChina
CityNanjing
Period24/09/1426/09/14

ASJC Scopus subject areas

  • Engineering(all)

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