Analysis and Optimization of Impact Resistance Performance of Variable Gradient Corrugated Sandwich Structure
College of Aeronautics and Astronautics, Nanchang Hangkong University, Nanchang 330063, China
| Abstract: | Corrugated sandwich structures, known for their exceptional specific stiffness, specific strength, lightweight characteristics, and superior energy absorption capabilities, are extensively used in the structural design of aerospace equipment. Given that aerospace equipment structures are prone to external impact loads during use, and considering the high demands for ensuring the safety of equipment and personnel, as well as the reliability of structural components, it is imperative to enhance the impact resistance of equipment structures. This paper introduces a novel biomimetic variable gradient corrugated sandwich structure based on biomimetic principles and constructs finite element models of five different gradient distributions of corrugated sandwich structures under impact loads using numerical simulation technology. The study systematically analyzes the influence of gradient distribution on the impact resistance of corrugated sandwich structures. The research reveals that the biomimetic corrugated sandwich structure with a 3-6-3 variable gradient distribution exhibits excellent impact resistance, offering a new design approach for more efficient anti-impact equipment structures. The study further investigates the impact of sandwich structural parameters on the impact resistance of corrugated sandwich structures and employs genetic algorithms for structural parameter optimization. The results indicate that the optimized corrugated sandwich structure panels not only achieve a significant enhancement in impact resistance but also realize structural lightweighting. |
| Keywords: | Variable Gradient Corrugated Sandwich Structures; Impact Resistance; Bionic; Optimization |
| DOI: | 10.57237/j.mse.2024.03.002 |
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Received: 19 November 2024
Accepted: 24 December 2024
Published Online: 9 January 2025
Funding
| 1. | National Natural Science Foundation of China (12362026) |
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