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Pyrolysis gas diffusion model in kevlar/nomex honeycomb structure on laser irradiating
Author(s): Weiping Liu; Chenghua Wei; Lixiong Wu; Zhiliang Ma; Yongxiang Zhu; Jiawei Wang
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Paper Abstract

Kevlar/nomex honeycomb sandwich structures are widely used by many apparatuses and vehicles in many domains. Since there are large quantities of epoxy resins in the structure, it is considerable to study the process that the structure is heated and produces pyrolysis gases which diffuse among the honeycomb. In this paper, the process of a laser beam irradiating a kevlar/nomex honeycomb sandwich is studied for building a mathematical model. The process is divided into two parts. One part focuses on the pyrolysis gas producing, the other one focuses on the gas diffusing among the honeycomb. The pyrolysis gas producing model is built according to experiment analysis, as a Boltzmann formula. The gas diffusion model is also built in the form of ODE equations. Validation experiment is carried out, demonstrating the model correct and accurate. Finally, the two models are combined together. By comparing with experiment, the laser irradiating and pyrolysis gas diffusing model is demonstrated to be appropriate to the case that kevlar laminas are bonded to the nomex honeycomb.

Paper Details

Date Published: 29 March 2019
PDF: 7 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110461K (29 March 2019); doi: 10.1117/12.2523557
Show Author Affiliations
Weiping Liu, Northwest Institute of Nuclear Technology (China)
Chenghua Wei, Northwest Institute of Nuclear Technology (China)
Lixiong Wu, Northwest Institute of Nuclear Technology (China)
Zhiliang Ma, Northwest Institute of Nuclear Technology (China)
Yongxiang Zhu, Northwest Institute of Nuclear Technology (China)
Jiawei Wang, Northwest Institute of Nuclear Technology (China)


Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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