Experimental Investigation of High Velocity Projectile Penetration into Innegra Fabric Composite

Document Type : Impact Mechanics

Authors

1 Ph.D. Student, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran

2 Corresponding author: Assistant Professor, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran

3 Assistant Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran

Abstract

High velocity impact resistance is a key requirement for advanced performance structures. This study focuses on experimental investigation of composite behavior made of Innegra fabric under high velocity impact. The targets are made by vacuum infusion method using Innegra fabric, which is a woven fabric composed of high modulus polypropylene fibers as reinforcement and epoxy as matrix.  These samples are subjected to high velocity impact test performed by gas gun. In the present article, the ballistic performance of two- and four-layer composites impacted by conical projectiles with different diameters of 5 and 10 mm are investigated and the effect of the projectile diameter and sabot is studied. The experimental tests have been performed in the velocity range from 30 m/s to 160 m/s for two- and four-layers composites. Ballistic limit, energy absorption and damage pattern have been investigated. The results show the appropriate ballistic performance of Innegra/epoxy composite compared to other composites such as Kevlar/epoxy. The ballistic limit velocity base on experimental tests for two-layer Innegra/epoxy composite with a conical projectile is 54 m/s and for four-layer composite with 52% increase, is 82 m/s and the energy absorption for two-layer composite is 27.33 J and for four-layer composite with 78% increase is 48.70J.

Highlights

  • The ballistic limit velocity for two and four layers Innegra/epoxy composite with a 10 mm diameter conical projectile is 54 m/s and 82 m/s respectively.
  • The energy absorption impacted by the 15.1 gr conical projectile for two and four layers Innegra/epoxy composite is 27.33 j and 48.70 j, respectively.

Keywords

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References

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Aerospace Mechanics
Volume 20, Issue 1 - Serial Number 75
Serial No. 75, Spring
April 2024
Pages 125-141

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History

  • Receive Date: 28 October 2023
  • Revise Date: 19 November 2023
  • Accept Date: 19 December 2023
  • Publish Date: 15 April 2024

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