Fatigue Characterization on a Cast Aluminum Beam of a High-Speed Train Through Numerical Simulation and Experiments

Dou, Weiyuan; Zhang, Lele; Chang, Haifeng; Hai-feng, Zhang; Liu, Changqing

doi:10.1186/s10033-021-00628-6

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…Corrosion pits, scratches and dents, ranging from micrometers to millimeters, are commonly for components like railway axles after long-term service [7,17,18]. These defects will lead to local stress concentration, which can be more significant and detrimental if there are secondary notches and/or microcracks on the defect surface [19][20][21][22]. Given these defects are in different shapes, it is hard and time-consuming to model their influence one by one precisely.…”

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confidence: 99%

Damage tolerance assessment of heavy-duty freight railway axles with artificial defects

Zhao

Liao

Gao

et al. 2023

Preprint

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Heavy-duty freight railway axles are no less important than that of passenger ones, due to the potentially catastrophic results caused by the derailment of trains carrying hazardous substances. Intrinsic and extrinsic imperfections challenge classical design theories built based on the safe life concept, and damage tolerance assessment becomes vital for the safety and reliability of long-term serviced railway axles, as pits and scratches are common defects for heavy-duty railway axles. In this work, four-point rotating bending fatigue tests of the AAR-CM railway axle steel specimens with semi-circular and circumferential groove notches were conducted. The fatigue limit of the semi-circular notched specimen was evaluated based on the fracture mechanics theory, in which non-conservative results were obtained by the Haddad model; and the 𝑺–𝑵curves of circumferential groove notched specimens were correlated by the theory of critical distance (TCD).

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mentioning

confidence: 99%

Damage tolerance assessment of heavy-duty freight railway axles with artificial defects

Zhao

Liao

Gao

et al. 2023

Preprint

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Bioinspired Design for Lightweighting and Vibration Behavior Optimization in Large-Scale Aeronautical Tooling: A Comparative Study

Laraudogoitia Blanc,

Hamm,

García de Cortázar

et al. 2023

Machines

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A comparative study is presented, focusing on three different bioinspired design methodologies applied to a large-scale aeronautical tooling use case. The study aims to optimize the structure in terms of the first vibration mode, minimizing mass, and supporting operational loads. The development of lightweight metallic components is of great importance for industries such as aerospace, automotive, and energy harvesting, where weight reduction can lead to significant improvements in performance, efficiency, and sustainability. Bioinspired design offers a promising approach to achieving these goals. The study begins with an introduction to natural selection and various bioinspired concepts. It proceeds with a thorough review of the selected bioinspired design methodologies and tools, which are then applied to the chosen use case. The outcomes for each methodology were explored with respect to the design requirements. Subsequently, the most suitable design was selected according to the success criteria defined and its validation is explained. The manufacturing of this design was carried out using an advanced and novel approach specifically tailored to accommodate the large dimensions and complexity of the structure. Finally, modal testing was performed to validate the entire process, and the results obtained demonstrate the potential effectiveness of bioinspired design methodologies in achieving lightweighting and optimizing vibration modes for large-scale aeronautical tooling.

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End-to-End Bioinspired Lightweight Structure Manufacturing-Oriented Design, Validation, and Manufacturing with Advanced Methods

Blanc,

de Cortazar,

Girot Mata

2023

10th Manufacturing Engineering Society International Conference (MESIC 2023)

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It is known that natural designs are more efficient and functionality-aimed than human designs. Historically, human beings have tried to mimic the way nature designs or the natural designs themselves. However, it turned out that it was usually too complex for the technology of the time. Today there exists the opportunity to mimic most natural designs due to advances in computational power and improvements in manufacturing methods. This can lead to a major weight reduction in the metallic components used, which is a key aspect in many engineering areas such as the aerospace, automotive or energetic industries. This study shows how these bioinspired designs can improve designer experience-based designs in several ways i.e.: mechanical behavior, part number reduction, weight reduction, etc. The components analyzed here will be metallic based on aluminum. It will be also shown the significance of the manufacturing-oriented design so the iteration times are reduced between the CAD and the CAM or the reduction of prototype manufacturing itself. Of course, these designs need to be validated mechanically via CAE and the CAM will also be used to avoid uncertainty during advanced manufacturing processes. Finally, the results of the real manufacturing process are going to be shown so the end-to-end cycle is complete.

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Fatigue Characterization on a Cast Aluminum Beam of a High-Speed Train Through Numerical Simulation and Experiments

Cited by 3 publications

References 25 publications

Damage tolerance assessment of heavy-duty freight railway axles with artificial defects

Damage tolerance assessment of heavy-duty freight railway axles with artificial defects

Bioinspired Design for Lightweighting and Vibration Behavior Optimization in Large-Scale Aeronautical Tooling: A Comparative Study

End-to-End Bioinspired Lightweight Structure Manufacturing-Oriented Design, Validation, and Manufacturing with Advanced Methods

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