Curing shrinkage stress and deformation analysis of adhesive bonding large aperture mirror | |
Sun, Li-Jun; Li, Li-Bo; Li, Si-Yuan; Zhao, Qiang; Sun, Jian; Wu, Jun-Qiang; Hu, Bing-Liang | |
2019 | |
会议名称 | 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, AOMATT 2018 |
会议录名称 | 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes |
卷号 | 10837 |
会议日期 | 2018-06-26 |
会议地点 | Chengdu, China |
出版者 | SPIE |
产权排序 | 1 |
摘要 | The influence of adhesive bonding and curing on the accuracy of mirror surface shape was analyzed to realize low-stress assembly of large aperture mirror. Firstly, based on Hooke's law, a curing shrinkage stress equation was deduced, taking deformation of the mirror and support structure into account under the boundary condition of continuous edge bond, and key parameters effecting mirror deformation were obtained. Secondly, for a 514mm ULE spectrometer primary mirror with an inserts structure mosaiced and bonded on mirror-back, an equivalent linear expansion coefficient method was used for finite element modeling. The shrinkage stress at the bond edge of mirror and the mirror surface shape were analyzed. It's found that adhesive shrinkage has a significant effect on the mirror surface shape. Finally, the inserts structure of mirror assembly was optimized. In contrast to the non-optimum structure, the average stress of adhesive surface caused by adhesive curing shrinkage reduced from 0.28MPa to 0.18MPa, and the mirror surface shape (Root Mean Square, RMS) reduced from 0.029λ to 0.017λ. Finite element analysis results of the mirror assembly were given at last, surface shape accuracy (RMS) of mirror is 0.012λ under a load case of 1g gravity, and the first-order natural frequency of the component is 216 Hz. The obtained results showed that a suitable optimized support structure can effectively relieve adhesive curing stress, and also satisfy the design requirements for both the static and dynamic stiffness. © 2019 SPIE. |
作者部门 | 光谱成像技术研究室 |
DOI | 10.1117/12.2505710 |
收录类别 | EI |
ISBN号 | 9781510623163 |
语种 | 英语 |
ISSN号 | 0277786X;1996756X |
EI入藏号 | 20190506432459 |
引用统计 | |
文献类型 | 会议论文 |
条目标识符 | http://ir.opt.ac.cn/handle/181661/31225 |
专题 | 光谱成像技术研究室 |
作者单位 | Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China |
推荐引用方式 GB/T 7714 | Sun, Li-Jun,Li, Li-Bo,Li, Si-Yuan,et al. Curing shrinkage stress and deformation analysis of adhesive bonding large aperture mirror[C]:SPIE,2019. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Curing shrinkage str(1097KB) | 会议论文 | 限制开放 | CC BY-NC-SA | 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论