Stress analysis and optimization of Nd:YAG pulsed laser processing of notches for fracture splitting of a C70S6 connecting rod

Although polymer-based nanocomposites have great application potential in many fields, compared with the application of ferroelectric nanocomposites in functional microscale structures and devices, especially in the field of photonics microdevices fabricated by laser processing, the development of polymer-based nanocomposites is relatively lagging behind. In this study, the polyvinylidene fluoride ferroelectric composite material was taken as the research object, and the preparation method of polymer nanocomposite material suitable for laser microstructure processing was solved by exploring the material functionalization method. The control of the optical properties of polyvinylidene fluoride ferroelectric composites was achieved through material design, control of the size of nanoparticles in the prepared polymer nanocomposites, and characterization of their structures and properties. Two-dimensional and three-dimensional structures of polymer nanocomposites were prepared by laser microstructure processing technology, and the optical properties of the microstructures were evaluated. When the applied stress field was zero, the macroscopic coercive field was larger, and the hystereswas loop was wider, while the butterfly curve changed rapidly near the coercive field, and the strain was negative. From the test results of the scanning electron microscope, it can be concluded that the lowest average power to find ablation traces was 0.06 mw, and the affected area was very small, and there was no damage to the surrounding nanotubes. Therefore, this paper believes that the damage threshold of carbon nanotubes was slightly less than 0.06 mw. This study contributes to the development of nanocomposite preparation methods for laser micromachining.

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“…ε m represents the dielectric constant of the polymer matrix, and f c refers to the percolation threshold [14].…”

Section: Application Of Laser Processingmentioning

confidence: 99%

Progress of Laser Processing Technology in Ferroelectric Nanocomposites

Ding

Fan

Dong

et al. 2022

Advances in Materials Science and Engineering

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“…During the operation of high-speed machine tools, spindle bearings rotate at high speeds with the electric spindle, and various friction factors generate resistance torque, intensifying internal frictional heat generation in the bearings [1][2][3][4][5][6][7]. If the bearing friction torque is too large, the temperature of the bearing will increase significantly, the lubrication performance of non-circulating grease will be greatly reduced, relative thermal displacement will occur inside the bearing components, and it is easy to cause surface burns on internal components, leading to bearing failure, damage, or even premature scrapping [8][9][10][11][12][13]. The temperature of the bearing has a significant impact on its service life and flexibility, and the deformation of components caused by friction factors also seriously affects the accuracy and stability of machined parts [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Temperature Field Analysis of High-Speed Bearings Considering Frictional Heat and Interactive Effects

Zheng¹

2023

IJHT

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The temperature of bearings has a significant impact on their service life and flexibility, so it becomes more important to analyze the temperature field of bearings in high-speed electric spindle machining applications. Scholars at home and abroad have completed the thermal characteristics analysis of high-speed bearings from multiple perspectives such as frictional heat generation, heat transfer, and thermal analysis, but there is less consideration of the effects of spin, rotation speed, and external loads on the temperature field, and the complex motion between various components inside the bearing is also ignored. There are even fewer transient thermal analyses of high-speed bearings using the ANSYS finite element analysis method. Therefore, this paper carries out a temperature field analysis of high-speed bearings considering the interactive effects of frictional heat generation. Firstly, the motion laws of bearings and the mechanism of friction generation are analyzed, and a high-speed bearing frictional heat generation calculation analysis model that conforms to actual working conditions is established. Based on the ANSYS finite element analysis software, the temperature field of high-speed bearings is analyzed, and the internal temperature field distribution law is obtained by exploring the effects of spin, rotation speed, and external loads on their temperature field. Finally, the paper presents experimental analysis results, which verify the effectiveness of the proposed calculation method and the established model.

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Detection and application of breaking of automobile mechanical transmission rod based on ant colony algorithm

Zha

2018

Concurrency and Computation

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SummaryThe automobile transmission is the core component of the automobile transmission system. Extracting effective fault feature information from a complex mechanical device like a car transmission is the key to fault diagnosis. In this paper, the vibration signals of the normal transmission and different faulty transmissions are collected through experiments, and the weak fault feature extraction of automobile transmission gears is based on the combination of Teager energy operator demodulation method and empirical mode decomposition method. Finally, the theory of SVM and its application in fault diagnosis are introduced. Based on the cross‐validation method, the grid search method and particle swarm optimization algorithm are used to search and optimize the important parameters in the SVM model to improve the performance of the SVM classifier.

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Stress analysis and optimization of Nd:YAG pulsed laser processing of notches for fracture splitting of a C70S6 connecting rod

Cited by 4 publications

References 7 publications

Progress of Laser Processing Technology in Ferroelectric Nanocomposites

Progress of Laser Processing Technology in Ferroelectric Nanocomposites

Temperature Field Analysis of High-Speed Bearings Considering Frictional Heat and Interactive Effects

Detection and application of breaking of automobile mechanical transmission rod based on ant colony algorithm

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