Multiaxial high-cycle fatigue constraints in structural optimization |
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| Affiliation: | 1. Cracow University of Technology, Institute of Rail Vehicles, Al.Jana Pawla II 37, 31-155 Krakow, Poland;2. Cracow University of Technology, Institute of Machine Design, Poland;1. US Naval Research Laboratory, Materials Science and Technology Division, Washington, DC, USA;2. Air Force Institute of Technology, Wright-Patterson AFB, OH, USA;3. Materials Research Centre, University of Wales Swansea, UK;1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China;2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016,China;1. Laboratory of Bio-inspired & Graphene Nanomechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy;2. Center for Materials and Microsystems, Fondazione Bruno Kessler, Via Sommarive 18, 38123 Povo, TN, Italy;3. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK;1. State Key Laboratory for Mechanical Behavior of Materials, Xi׳an Jiaotong University, Xi׳an 710049, China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi׳an Jiaotong University, Xi׳an 710049, China;3. Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188, Japan |
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| Abstract: | The paper deals with parametric optimization of structures subjected to multiaxial high-cycle fatigue. A large number of load cycles corresponding to infinite fatigue life was taken into account in the analysis and optimization. The authors use simplified form of Dang Van’s criterion for fatigue damage estimation. For needs of optimization, a certain transformation pattern of the load time history was assumed, which allowed to considerably accelerate the fatigue analysis process. The proposed methodology has been illustrated by an example of optimization of a car suspension arm. As observed in the computational example, the proposed methodology of optimization allowed effectively to reduce the mass of the studied structure while maintaining its fatigue durability on an established level. |
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