夏兆辉
267

个人信息Personal Information

副教授   博士生导师   硕士生导师  

性别:男

所在单位:机械科学与工程学院

学历:研究生(博士)毕业

学位:工学博士学位

毕业院校:华中科技大学

学科:机械设计及理论
机械制造及其自动化

论文成果

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A New Finite Element Model with Manufactured Error for Additive Manufacturing

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论文类型:期刊论文

发表刊物:CMES-Computer Modeling in Engineering & Sciences

收录刊物:SCI

学科门类:工学

一级学科:机械工程

关键字:Additive manufacturing; manufacturing error; finite element analysis; overhangs; 3D printing

DOI码:10.32604/cmes.2020.010368

摘要:Additive manufacturing (AM), adding materials layer by layer, can be used to produce objects of almost any shape or geometry. However, AM techniques cannot accurately build parts with large overhangs, especially for the large features close to horizontal, hanging over the void. The overhangs will make the manufactured model deviate from the design model, which will result in the performance of the manufactured model that cannot satisfy the design requirements. In this paper, we will propose a new finite element (FE) analysis model that includes the manufacturing errors by mimicking the AM layer by layer construction process. In such FE model, an overhang coefficient is introduced to each FE, which is defined by the support elements in the lower layer. By mimicking the AM process from the bottom layer to the top layer, all the FE properties are updated based on their overhang coefficients, which makes the computational model be able to predict the manufactured model with manufacturing errors. The proposed model can be used to predict the performance of the AM objects in the design stage, which will help the designers to improve their design by the simulation results.

发布期刊链接:https://www.techscience.com/CMES/v124n2/39546