Pyrolysis gas diffusion model in kevlar/nomex honeycomb structure on laser irradiating

Weiping Liu; Chenghua Wei; Lixiong Wu; Zhiliang Ma; Yongxiang Zhu; Jiawei Wang

doi:10.1117/12.2523557

29 March 2019 Pyrolysis gas diffusion model in kevlar/nomex honeycomb structure on laser irradiating

Weiping Liu, Chenghua Wei, Lixiong Wu, Zhiliang Ma, Yongxiang Zhu, Jiawei Wang

Proceedings Volume 11046, Fifth International Symposium on Laser Interaction with Matter; 110461K (2019) https://doi.org/10.1117/12.2523557
Event: Fifth International Symposium on Laser Interaction with Matter, 2018, Changsha, China

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.

Citation Download Citation

Weiping Liu, Chenghua Wei, Lixiong Wu, Zhiliang Ma, Yongxiang Zhu, and Jiawei Wang "Pyrolysis gas diffusion model in kevlar/nomex honeycomb structure on laser irradiating", Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110461K (29 March 2019); https://doi.org/10.1117/12.2523557

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