{"title":"将改进的 CSF 模型和改进的 KGC 技术纳入 SPH,用于选择性激光熔化过程建模","authors":"","doi":"10.1016/j.enganabound.2024.105876","DOIUrl":null,"url":null,"abstract":"<div><p>Selective laser melting (SLM) is an advanced additive manufacturing technology related to the powder bed fusion (PBF) process. Numerical simulation is the key means of realizing the shape and property control of components for additive manufacturing. In this paper, an improved smoothed particle hydrodynamics (SPH) method is proposed for the numerical simulation of the SLM process, focusing on the melt pool flow. The accuracy of calculations at the free surface is significant for modeling the SLM process and there are kernel function truncation errors of the SPH method at the free surface. Therefore, an improved kernel gradient correction (KGC) technique and an improved continuous surface tension model are proposed to improve the accuracy of calculations at the free surface. The KGC technique can improve the accuracy of the kernel gradient in SPH approximation, however, the accuracy of KGC will decrease on the free surface. To improve the computational accuracy on the free surface, an improved KGC is developed. The surface tension model is significant for the numerical simulation of the SLM process, and an improved continuous surface tension (CSF) model is developed to enhance the stability and accuracy of surface tension modeling. In addition, a Gaussian heat source model and a latent heat model are introduced in the improved SPH model. The accuracy and effectiveness of the present SPH method for simulating the melting and melt pool flow of the SLM process are also verified by four numerical examples.</p></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An improved CSF model and an improved KGC technique incorporated in SPH for modeling selective laser melting process\",\"authors\":\"\",\"doi\":\"10.1016/j.enganabound.2024.105876\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Selective laser melting (SLM) is an advanced additive manufacturing technology related to the powder bed fusion (PBF) process. Numerical simulation is the key means of realizing the shape and property control of components for additive manufacturing. In this paper, an improved smoothed particle hydrodynamics (SPH) method is proposed for the numerical simulation of the SLM process, focusing on the melt pool flow. The accuracy of calculations at the free surface is significant for modeling the SLM process and there are kernel function truncation errors of the SPH method at the free surface. Therefore, an improved kernel gradient correction (KGC) technique and an improved continuous surface tension model are proposed to improve the accuracy of calculations at the free surface. The KGC technique can improve the accuracy of the kernel gradient in SPH approximation, however, the accuracy of KGC will decrease on the free surface. To improve the computational accuracy on the free surface, an improved KGC is developed. The surface tension model is significant for the numerical simulation of the SLM process, and an improved continuous surface tension (CSF) model is developed to enhance the stability and accuracy of surface tension modeling. In addition, a Gaussian heat source model and a latent heat model are introduced in the improved SPH model. The accuracy and effectiveness of the present SPH method for simulating the melting and melt pool flow of the SLM process are also verified by four numerical examples.</p></div>\",\"PeriodicalId\":51039,\"journal\":{\"name\":\"Engineering Analysis with Boundary Elements\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-07-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Engineering Analysis with Boundary Elements\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0955799724003515\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Analysis with Boundary Elements","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955799724003515","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
An improved CSF model and an improved KGC technique incorporated in SPH for modeling selective laser melting process
Selective laser melting (SLM) is an advanced additive manufacturing technology related to the powder bed fusion (PBF) process. Numerical simulation is the key means of realizing the shape and property control of components for additive manufacturing. In this paper, an improved smoothed particle hydrodynamics (SPH) method is proposed for the numerical simulation of the SLM process, focusing on the melt pool flow. The accuracy of calculations at the free surface is significant for modeling the SLM process and there are kernel function truncation errors of the SPH method at the free surface. Therefore, an improved kernel gradient correction (KGC) technique and an improved continuous surface tension model are proposed to improve the accuracy of calculations at the free surface. The KGC technique can improve the accuracy of the kernel gradient in SPH approximation, however, the accuracy of KGC will decrease on the free surface. To improve the computational accuracy on the free surface, an improved KGC is developed. The surface tension model is significant for the numerical simulation of the SLM process, and an improved continuous surface tension (CSF) model is developed to enhance the stability and accuracy of surface tension modeling. In addition, a Gaussian heat source model and a latent heat model are introduced in the improved SPH model. The accuracy and effectiveness of the present SPH method for simulating the melting and melt pool flow of the SLM process are also verified by four numerical examples.
期刊介绍:
This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods.
Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness.
The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields.
In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research.
The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods
Fields Covered:
• Boundary Element Methods (BEM)
• Mesh Reduction Methods (MRM)
• Meshless Methods
• Integral Equations
• Applications of BEM/MRM in Engineering
• Numerical Methods related to BEM/MRM
• Computational Techniques
• Combination of Different Methods
• Advanced Formulations.