Experimental investigation of ballistic limit and energy absorption in hybrid composites made of Kevlar and Ingra fibers

Authors

1 M.Sc. of Mech. Eng., Sistan and Baluchestan Univ., Zahedan, Iran

2 Assistant Professor, Mechanical Engineering Department, Sistan And Baluchestan University,, Zahedan, Iran

10.22044/jsfm.2025.14979.3885

Abstract

In this research, the effect of high velocity impact on Kevlar/Innegra hybrid composites and the effect of adding Innegra fibers on the ballistic properties of Kevlar/epoxy samples have been studied experimentally. For this purpose, 6 sets of samples with different configurations of Kevlar and Innegra fabric fibers were made in 5 layers. Then, the high velocity impact test (gas gun) was performed on the samples at two velocities of 103 and 136 m/s (higher than the ballistic limit speed) and at the energy level of 37 and 64 joules, respectively, by the projectile of conical head cylinders. To find the most optimal configuration; With the help of energy relationships, the ballistic limit and energy absorption rate were calculated for each sample separately and it was observed that the use of Innegra fibers with IKIKI configuration increased energy absorption by 50.57% compared to the Kevlar/epoxy sample. Further, due to the non-uniformity of thickness and mass among the manufactured samples, the specific energy absorption rate was calculated for Kevlar/Innegra hybrids, and the values obtained for KIKIK and IKIKI samples show an increase of 61.5% and 23%, respectively. The above results show the high effect of using Innegra fibers in increasing the energy absorption of the Kevlar/epoxy sample.

Keywords

Main Subjects

References

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Journal of Solid and Fluid Mechanics
Volume 14, Issue 6
May and June 2025
Pages 61-74

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