Experimental study of the high-power laser resistance of ablative material-filled sandwich panels with truss cores under hypersonic airflow

被引：7
作者：
Yuan, Wu [1 ,2 ]
Wang, Jiangtao [1 ,2 ]
Wang, Ruixing [1 ,2 ]
Wang, Zhe [1 ,2 ]
Song, Hongwei [1 ,2 ]
Huang, Chenguang [2 ]
机构：
[1] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
来源：
COMPOSITE STRUCTURES | 2022年 / 301卷
基金：
中国国家自然科学基金;
关键词：
Sandwich panel; Thermal insulation; Lightweight structure; Failure point; STABLE MECHANICAL METAMATERIALS; MELT-THROUGH; SOLID MATERIALS; TIME REDUCTION; BEHAVIOR;
D O I：
10.1016/j.compstruct.2022.116139
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this study, the performance of ablative material-filled sandwich structures with truss cores under laser irra-diation is experimentally analyzed in a hypersonic wind tunnel. As a comparison, we investigated the responses of a monolithic high-temperature alloy plate, unfilled sandwich panel, and thermal insulating material-filled sandwich panel. Failure times and ablation morphologies are assessed using a high-speed camera, while tem-perature histories are obtained using a colorimetric pyrometer. Experimental results show that, when subjected to a transverse hypersonic airflow, the laser resistance of the ablative material-filled sandwich structures is substantially better than that of other structures. Compared to a static environment, failure times of the sandwich structures in the hypersonic airflow are reduced due to the mechanical erosion effect. The detailed action mechanisms of the ablative material-filled sandwich structures are revealed by numerical modeling and the characterization of the ablation morphology.
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页数：11
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