Analytical and numerical investigation of polyurea layered aluminium plates subjected to high velocity projectile impact

Damith Mohotti, Tuan Ngo, Sudharshan Naidu Raman, Priyan Mendis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This paper discusses on the penetration of high velocity projectiles through aluminium-polyurea composite layered plate systems. An analytical model has been proposed to predict the residual velocity of aluminium-polyurea composite plates, and validated with both experimental and numerical investigations. Full metal jacket (FMJ) projectiles (5.56 mm × 45 mm), corresponding to NATO standard SS109, were fired at the aluminium-polyurea composite layered plate systems from a distance of 10.0 m at a fixed velocity of 945 m/s. Four different composite plate configurations were used with thicknesses varying from 16 to 34. mm. Each configuration consisted of six specimens. Residual velocities for each individual test were recorded. Numerical simulations of the penetration process have been performed using advanced finite element code LS-DYNA®. The well-established Johnson-Cook and Mooney-Rivlin material models were used to represent the stress-strain behaviour of aluminium and polyurea in the numerical analysis. The analytical and numerical models provided good approximations for the residual velocities measured during the experimental tests. Polyurea layers contributed positively towards the reduction of residual velocity of the projectile in composite plate systems. In addition, ballistic limit curves for different composite systems have been established based on the validated models. As the results showed that polyurea contributes positively towards the reduction of residual velocity of projectiles, the findings of this study can be effectively used for the similar applications in future armour industry.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalMaterials and Design
Volume82
DOIs
Publication statusPublished - 5 Oct 2015

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Projectiles
Aluminum
Composite materials
Analytical models
Armor
Ballistics
polyurea
Large scale systems
Numerical analysis
Numerical models
Metals
Computer simulation
Industry

Keywords

  • Aluminium
  • Analytical model
  • Composite plates
  • High velocity impact
  • Numerical simulation
  • Polyurea

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Analytical and numerical investigation of polyurea layered aluminium plates subjected to high velocity projectile impact. / Mohotti, Damith; Ngo, Tuan; Raman, Sudharshan Naidu; Mendis, Priyan.

In: Materials and Design, Vol. 82, 05.10.2015, p. 1-17.

Research output: Contribution to journalArticle

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