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162 results on '"Xie, Chenyang"'

32. A novel post‐forming method for fully cured thermosetting composite parts: Prediction and investigation.

Author

Sun, Lishuai, Xie, Chenyang, Liu, Chuang, and Wang, Junbiao

Abstract

Highlights The objective of this work is to devise a post‐forming technique capable of accurately and significantly altering the shape of fully cured thermosetting composite parts. To accomplish this goal, the viscoelastic behavior and resulting deformation of fully cured parts at elevated temperatures were predicted and examined using viscoelastic mechanics, finite element analysis (FEA), surrogate modeling, and the particle swarm optimization (PSO) method. Firstly, the mechanism of fully cured parts' shape adjustment based on viscoelastic mechanics was introduced, and a method was established for the inverse identification of the stress relaxation ratio in the different directions of material. Secondly, an FEA model for predicting post‐forming was developed based on the standard linear‐solid viscoelastic model. A dataset was then compiled using parameterized FEA to train a rapid prediction model for post‐forming. The influence of various forming and structural parameters on the post‐forming process was examined. The results indicate that layup has the most significant impact, followed by displacement and temperature. The radial basis function was selected to construct the precise surrogate model after comparing it with the Kriging model and the Response Surface Methodology (RSM) model. Ultimately, to achieve the desired shape after post‐forming, the PSO method can be employed to determine the ideal combination of forming parameters. The post‐forming method could adjust the shape of fully cured composites. The mechanism of post‐forming is based on viscoelastic behavior. An accurate FEA based on the standard linear‐solid model was established. The radial basis function was developed for quick and precise prediction. The particle swarm optimization could obtain the ideal forming parameters. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Digital workflow of labial guides for alveolar ridge reduction during implant‐supported full‐arch rehabilitation.

Author

Fang, Tinglu, Gao, Jing, Wu, Qin, Xie, Chenyang, Zhang, Yuqiang, Lu, Jiayi, and Yu, Haiyang

Subjects
COMPLETE dentures, ALVEOLAR process, MINIMALLY invasive procedures, WORKFLOW, DENTURES, REHABILITATION
Abstract

This article presents a technique for fabricating two‐piece labial guides using resin and cobalt‐chromium for guided alveoloplasty, implant placement, and immediate full‐arch implant‐supported fixed complete denture placement. This technique reduces tissue damage and overcomes the negative effect of the anatomical position of the palatal neuropore and mobility of the tissue flap on the positioning and stability of the guide. The use of labial retention metal guides with improved mechanical properties of cobalt‐chromium and fixation plugs allows the unilateral placement of the guide. Thus, minimally invasive implant surgery can be performed owing to the absence of large palatal flap elevation and obstruction. Such a design provides better stability of the guides and clear visual access during surgery. [ABSTRACT FROM AUTHOR]

Published
2024
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