Prediction and Quantification of Ballistic Limit for Aluminum 2024-T3/T351 Sheets/Plates Using Johnson- Cook Material Model

Rashmi, Hundekari and Shivakumar, BA and Kiran Kumar, N (2014) Prediction and Quantification of Ballistic Limit for Aluminum 2024-T3/T351 Sheets/Plates Using Johnson- Cook Material Model. Journal of Mechanical Engineering Research and Technology. pp. 253-259.

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Abstract

Survivability of any structure in the event of ballistic impact depends on the impact resistance offered by that structure, which in turn depends on its material and geometry. It is required to predict and quantify the ballistic limit of such structures to enable the designers to decide upon their applicability in the environments involving high velocity impact such as uncontained engine rotor and propeller blade failure in aircrafts, bullet hits and small explosions on cockpit doors in aircraft and on battlefields. Designing ballistic protections is simple if a data base depicting ballistic limits for various plates made out of different materials or thicknesses is readily available. In present work, keeping in view this need for identification of ballistic limits and generation of ballistic limit database, numerical analysis using ABAQUS Explicit solver has been carried out for Al-2024-T3/T351, one of the most extensively used materials in the aerospace industry. Plates of Al-2024-T3/T351 of various thicknesses are impacted by spherical rigid projectile. Strain rate dependent, thermo-visco-plastic Johnson–Cook material model is used. Ballistic limits have been predicted and compared against the test data. The numerical predictions obtained are in close agreement with the experimental data available in literature. Methodology presented in this paper can be used for evaluation of ballistic limits and design verification of fragment barriers, shields and casing of aircraft engines subjected to high velocity impacts, bulletproof vests and body armors.

Item Type: Article
Subjects: AERONAUTICS > Air Transportation and Safety
Depositing User: Mrs Hundekari Rashmi
Date Deposited: 20 Nov 2014 03:57
Last Modified: 20 Nov 2014 03:57
URI: http://nal-ir.nal.res.in/id/eprint/12023

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