Topology Optimization Design and Experimental Research of a 3D-Printed Metal Aerospace Bracket Considering Fatigue Performance
Open Access
- 21 July 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (15), 6671
- https://doi.org/10.3390/app11156671
Abstract
In the aerospace industry, spacecraft often serve in harsh operating environments, so the design of ultra-lightweight and high-performance structures is a major requirement in aerospace structure design. In this article, a lightweight aerospace bracket considering fatigue performance was designed by topology optimization and manufactured by 3D-printing. Considering the requirements of assembly with a fixture for fatigue testing and avoiding stress concentration, a reconstructed model was presented by CAD software before manufacturing. To improve the fatigue performance of the structure, this article proposes the design idea of abstracting the practiced working condition of the bracket subjected to cycle loads in the vertical direction via a multiple load-case topology optimization problem by minimizing compliance under a variety of asymmetric extreme loading conditions. Parameter sweeping was used to improve the computational efficiency. The mass of the new bracket was reduced by 37% compared to the original structure. Both numerical simulation and the fatigue test were implemented to support the validity of the new bracket. This work indicates that the integration of the proposed topology optimization design method and additive manufacturing can be a powerful tool for the design of lightweight structures considering fatigue performance.Keywords
Funding Information
- the Foundation for Excellent Young Scholars of Jilin Province, China (20190103015JH)
This publication has 22 references indexed in Scilit:
- Fatigue performance evaluation of selective laser melted Ti–6Al–4VMaterials Science and Engineering: A, 2014
- Fatigue constrained topology optimizationStructural and Multidisciplinary Optimization, 2014
- Topological Design for Minimum Dynamic Compliance of Structures under Forced VibrationPublished by Springer Nature ,2014
- Topology optimization approachesStructural and Multidisciplinary Optimization, 2013
- Laser additive manufacturing of metallic components: materials, processes and mechanismsInternational Materials Reviews, 2012
- Topology optimization in damage governed low cycle fatigueComptes Rendus Mecanique, 2008
- A critical review of established methods of structural topology optimizationStructural and Multidisciplinary Optimization, 2008
- Topology optimization of continuum structures: A review*Applied Mechanics Reviews, 2001
- Design sensitivity analysis: Overview and reviewInverse Problems in Engineering, 1994
- The method of moving asymptotes—a new method for structural optimizationInternational Journal for Numerical Methods in Engineering, 1987