@inproceedings{4f7f40d5170a46daa672a16756ca87f4,
title = "A research methodology for crashworthiness evaluation of aero-structures under impact loading",
abstract = "The present work describes a methodical approach of material characterization and constitutive modeling with intent to apply it in finite-element (FE) solver to simulate the impact behavior of critical aircraft structures. The dynamic response analysis of a military aircraft windshield and canopy manufactured from Poly-methyle-methacrylate (PMMA) polymer was undertaken. The work is divided in three integral phases. In the first phase the material characterization was carried out at low and high strain-rates using universal testing machine and Split Hopkinson pressure bar (SHPB) respectively. In second phase of work, the material testing results were used to constitute a material model that can predict the deformation behavior of polymer under different loading conditions. The last phase of work deals with numerical implementation of constitutive model by incorporating a user-defined material subroutine in LS-DYNA, an explicit finite-element program. After successful implementation, the model was employed to determine the impact behavior of a military aircraft windshield and canopy against bird impact. The close experimental and simulation results encourages that the proposed model can effectively be used to assess the dynamic behavior of polymer based aero-structures under high velocity impact applications.",
keywords = "Constitutive model, High velocity impact, LS DYNA, Mechanical behavior, PMMA, Strain rate",
author = "Dar, {Uzair Ahmed} and Weihong Zhang and Xu, {Ying Jie}",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 14th International Bhurban Conference on Applied Sciences and Technology, IBCAST 2017 ; Conference date: 10-01-2017 Through 14-01-2017",
year = "2017",
month = mar,
day = "1",
doi = "10.1109/IBCAST.2017.7868046",
language = "英语",
series = "Proceedings of 2017 14th International Bhurban Conference on Applied Sciences and Technology, IBCAST 2017",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "137--142",
editor = "Muhammad Zafar-uz-Zaman",
booktitle = "Proceedings of 2017 14th International Bhurban Conference on Applied Sciences and Technology, IBCAST 2017",
}