 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13205 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8140
|
| In English (Mech. Solids): | | 5065 |
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| Xu Zhang, Shuaiqiang Zhang, Yan Fang, and Wei Li, "Study on the Bending Properties and Failure Behaviors of Scarf-Repaired Honeycomb Sandwich Structures Considering the Optimal Design of an Additional Layer," Mech. Solids. 60 (2), 1368-1386 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
2 |
Pages |
1368-1386 |
| DOI |
10.1134/S002565442460692X |
| Title |
Study on the Bending Properties and Failure Behaviors of Scarf-Repaired Honeycomb Sandwich Structures Considering the Optimal Design of an Additional Layer |
| Author(s) |
Xu Zhang (School of Aeronautics and Astronautics, Tiangong University, Tianjin, 300387 China, zhangxu@tiangong.edu.cn)
Shuaiqiang Zhang (School of Mechanical Engineering, Tiangong University, Tianjin, 300387 China)
Yan Fang (School of Mechanical Engineering, Tiangong University, Tianjin, 300387 China)
Wei Li (School of Energy and Safety Engineering, Tianjin Chengjian University, Tianjin, 300384 China) |
| Abstract |
The stress concentration occurs at the junction of the patch and original structure when the
scarf-repaired honeycomb sandwich structure is subjected to the secondary impact, thus causing the
local delamination and debonding in Carbon Fiber Reinforced Polymer (CFRP) panels. The introduction of an additional layer improves the strength and stiffness of scarf-repaired structures, but poor
surface smoothness and larger uneven stress distribution occur after the dimensions of the additional
layer increase to a certain extent. Hence, the optimal design of an additional layer is considered in the scarf-repaired structure to improve the load-bearing performance. The finite element models of scarfrepaired structures with and without an additional layer are established based on the 3D Hashin failure
criterion, and the bending performance analysis is performed to obtain the maximum bearing load.
An optimization model with the side length, thickness, and carbon fiber ply angle of the additional
layer as design variables and the maximum bearing load as the design objective is built, and then is
solved by the Response Surface Method (RSM). Three-point bending tests are conducted on the
scarf-repaired carbon fiber composite-aramid paper honeycomb sandwich structures with and without an optimized additional layer. The results indicate that the optimized additional layer has made the
load-bearing performance and deformation capacity of the scarf-repaired honeycomb sandwich structure significantly improve, that is, has effectively alleviate the stress concentration in the connection
area between the patch and original structure. |
| Keywords |
honeycomb sandwich structure, additional layer optimization, scarf repair |
| Received |
09 December 2024 | Revised |
20 March 2025 | Accepted |
25 March 2025 |
| Link to Fulltext |
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