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Investigation on Numerical Method of Natural Fragment Warhead Based on LS-DYNA

Yu Jiang, Shi Dang-yong

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Abstract

In order to study numerical method of natural fragment warhead, element failure model and nodes-tied model were investigated for the whole process of detonation drive characteristics with LS-DYNA finite element dynamic code.Key technical problems such as scattering characteristics of fragment, radius expanding curve, and fragment velocity curve were obtained.By analyzing characteristics of natural fragment warhead, influence of different model was considered.The results show that element failure method may cause great error in fragment scattering, and nodes-tied model is in accord with practice.

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What this paper is about

In order to study numerical method of natural fragment warhead, element failure model and nodes-tied model were investigated for the whole process of detonation drive characteristics with LS-DYNA finite element dynamic code.Key technical problems such as scattering characteristics of fragment, radius expanding curve, and fragment velocity curve were obtained.By analyzing characteristics of natural fragment warhead, influence of different model was considered.The results show that element failure method may cause great error in fragment scattering, and nodes-tied model is in accord with practice.

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Available abstract

In order to study numerical method of natural fragment warhead, element failure model and nodes-tied model were investigated for the whole process of detonation drive characteristics with LS-DYNA finite element dynamic code.Key technical problems such as scattering characteristics of fragment, radius expanding curve, and fragment velocity curve were obtained.By analyzing characteristics of natural fragment warhead, influence of different model was considered.The results show that element failure method may cause great error in fragment scattering, and nodes-tied model is in accord with practice.

Key concepts: Warhead, Fragment (logic), LS-DYNA, RADIUS, Detonation, Structural engineering, Finite element method, Process (computing)

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