{"title":"Modelling of TMF Crack Growth in Polycrystalline Gas Turbine Alloys : Accounting for Crack Closure Effects","authors":"Jordi Loureiro-Homs","doi":"10.3384/lic.diva-170275","DOIUrl":"https://doi.org/10.3384/lic.diva-170275","url":null,"abstract":"","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116625458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As marine vessels are becoming increasingly autonomous, having accurate simulation models available is turning into an absolute necessity. This holds both for facilitation of development and for ac ...
随着船舶变得越来越自动化，拥有精确的仿真模型变得绝对必要。这既适用于促进发展，也适用于……
{"title":"Estimation of Nonlinear Greybox Models for Marine Applications","authors":"Fredrik Ljungberg","doi":"10.3384/lic.diva-165828","DOIUrl":"https://doi.org/10.3384/lic.diva-165828","url":null,"abstract":"As marine vessels are becoming increasingly autonomous, having accurate simulation models available is turning into an absolute necessity. This holds both for facilitation of development and for ac ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116192349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A timing approach to network-based anomaly detection for SCADA systems","authors":"Chih-Yuan Lin","doi":"10.3384/lic.diva-165155","DOIUrl":"https://doi.org/10.3384/lic.diva-165155","url":null,"abstract":"","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"285 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120988433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Additive Manufacturing (AM) is gaining popularity in aerospace and automotive industries. This is a versatile manufacturing process, where highly complex structures are fabricated and together with ...
{"title":"Topology Optimization for Additive Manufacturing Involving High-Cycle Fatigue","authors":"Shyam Suresh","doi":"10.3384/lic.diva-165503","DOIUrl":"https://doi.org/10.3384/lic.diva-165503","url":null,"abstract":"Additive Manufacturing (AM) is gaining popularity in aerospace and automotive industries. This is a versatile manufacturing process, where highly complex structures are fabricated and together with ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141202515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the context of what is commonly referred to as consumer-centric digital economy, personal data has become the new currency which is utilized by consumers to be granted access to seemingly “free ...
在通常被称为以消费者为中心的数字经济的背景下，个人数据已经成为消费者用来获得看似“免费……
{"title":"Mind Your Own Business : Understanding and characterizing valuecreated by consumers in a digital economy","authors":"M. D. Mileros","doi":"10.3384/lic.diva-164307","DOIUrl":"https://doi.org/10.3384/lic.diva-164307","url":null,"abstract":"In the context of what is commonly referred to as consumer-centric digital economy, personal data has become the new currency which is utilized by consumers to be granted access to seemingly “free ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121537777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Additive manufacturing (AM) of parts using a layer by layer approach has seen a rapid increase in application for production of net shape or near-net shape complex parts, especially in the field of ...
使用逐层方法的零件增材制造(AM)在生产净形状或近净形状复杂零件方面的应用迅速增加，特别是在…
{"title":"Residual Stress Distributions in Additively Manufactured Parts : Effect of Build Orientation","authors":"Prabhat Pant","doi":"10.3384/lic.diva-164108","DOIUrl":"https://doi.org/10.3384/lic.diva-164108","url":null,"abstract":"Additive manufacturing (AM) of parts using a layer by layer approach has seen a rapid increase in application for production of net shape or near-net shape complex parts, especially in the field of ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126716393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this thesis, the use of low-rank approximations in connection with problems in system identification is explored. Firstly, the motivation of using low-rank approximations in system identificatio ...
本文探讨了低秩近似在系统辨识问题中的应用。首先，分析了在系统辨识中使用低秩近似的动机。
{"title":"Low-rank optimization in system identification","authors":"Måns Klingspor","doi":"10.3384/lic.diva-161286","DOIUrl":"https://doi.org/10.3384/lic.diva-161286","url":null,"abstract":"In this thesis, the use of low-rank approximations in connection with problems in system identification is explored. Firstly, the motivation of using low-rank approximations in system identificatio ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128400258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cellular network operators have witnessed significant growth in data traffic in the past few decades. This growth occurs due to the increases in the number of connected mobile devices, and furt ...
{"title":"Power Control for Multi-Cell Massive MIMO","authors":"Amin Ghazanfari","doi":"10.3384/lic.diva-160782","DOIUrl":"https://doi.org/10.3384/lic.diva-160782","url":null,"abstract":"The cellular network operators have witnessed significant growth in data traffic in the past few decades. This growth occurs due to the increases in the number of connected mobile devices, and furt ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127673315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The work presented in this thesis focuses on how to utilize epitaxially grown graphene on SiC as a basis for ultra-sensitive gas sensor. Several approaches have been tested and evaluated to increas ...
{"title":"Towards a versatile gas sensing platform with epitaxial graphene","authors":"M. Rodner","doi":"10.3384/lic.diva-160482","DOIUrl":"https://doi.org/10.3384/lic.diva-160482","url":null,"abstract":"The work presented in this thesis focuses on how to utilize epitaxially grown graphene on SiC as a basis for ultra-sensitive gas sensor. Several approaches have been tested and evaluated to increas ...","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131163245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent decades, the development of computer-controlled manufacturing by adding material layer by layer, called Additive Manufacturing (AM), has developed at a rapid pace. The technology adds possibilities to the manufacturing of geometries that are not possible, or at least not economically feasible, to manufacture by more conventional manufacturing methods. AM comes with the idea that complexity is free, meaning that complex geometries are as expensive to manufacture as simple geometries. This is partly true, but there remain several design rules that needs to be considered before manufacturing. The research field Design for Additive Manufacturing (DfAM) consists of research that aims to take advantage of the possibilities of AM while considering the limitations of the technique. Computer Aided technologies (CAx) is the name of the usage of methods and software that aim to support a digital product development process. CAx includes software and methods for design, the evaluation of designs, manufacturing support, and other things. The common goal with all CAx disciplines is to achieve better products at a lower cost and with a shorter development time. The work presented in this thesis bridges DfAM with CAx with the aim of achieving design automation for AM. The work reviews the current DfAM process and proposes a new integrated DfAM process that considers the functionality and manufacturing of components. Selected parts of the proposed process are implemented in a case study in order to evaluate the proposed process. In addition, a tool that supports part of the design process is developed. The proposed design process implements Multidisciplinary Design Optimization (MDO) with a parametric CAD model that is evaluated from functional and manufacturing perspectives. In the implementation, a structural component is designed using the MDO framework, which includes Computer Aided Engineering (CAE) models for structural evaluation, the calculation of weight, and how much support material that needs to be added during manufacturing. The component is optimized for the reduction of weight and minimization of support material, while the stress levels in the component are constrained. The developed tool uses methods for high level Parametric CAD modelling to simplify the creation of parametric CAD models based on Topology Optimization (TO) results. The work concludes that the implementation of CAx technologies in the DfAM process enables a more automated design process with less manual design iterations than traditional DfAM processes. It also discusses and presents directions for further research to achieve a fully automated design process for Additive Manufacturing.
{"title":"Towards Design Automation for Additive Manufacturing : A Multidisciplinary Optimization approach","authors":"A. Wiberg","doi":"10.3384/lic.diva-160888","DOIUrl":"https://doi.org/10.3384/lic.diva-160888","url":null,"abstract":"In recent decades, the development of computer-controlled manufacturing by adding material layer by layer, called Additive Manufacturing (AM), has developed at a rapid pace. The technology adds possibilities to the manufacturing of geometries that are not possible, or at least not economically feasible, to manufacture by more conventional manufacturing methods. AM comes with the idea that complexity is free, meaning that complex geometries are as expensive to manufacture as simple geometries. This is partly true, but there remain several design rules that needs to be considered before manufacturing. The research field Design for Additive Manufacturing (DfAM) consists of research that aims to take advantage of the possibilities of AM while considering the limitations of the technique. Computer Aided technologies (CAx) is the name of the usage of methods and software that aim to support a digital product development process. CAx includes software and methods for design, the evaluation of designs, manufacturing support, and other things. The common goal with all CAx disciplines is to achieve better products at a lower cost and with a shorter development time. The work presented in this thesis bridges DfAM with CAx with the aim of achieving design automation for AM. The work reviews the current DfAM process and proposes a new integrated DfAM process that considers the functionality and manufacturing of components. Selected parts of the proposed process are implemented in a case study in order to evaluate the proposed process. In addition, a tool that supports part of the design process is developed. The proposed design process implements Multidisciplinary Design Optimization (MDO) with a parametric CAD model that is evaluated from functional and manufacturing perspectives. In the implementation, a structural component is designed using the MDO framework, which includes Computer Aided Engineering (CAE) models for structural evaluation, the calculation of weight, and how much support material that needs to be added during manufacturing. The component is optimized for the reduction of weight and minimization of support material, while the stress levels in the component are constrained. The developed tool uses methods for high level Parametric CAD modelling to simplify the creation of parametric CAD models based on Topology Optimization (TO) results. The work concludes that the implementation of CAx technologies in the DfAM process enables a more automated design process with less manual design iterations than traditional DfAM processes. It also discusses and presents directions for further research to achieve a fully automated design process for Additive Manufacturing.","PeriodicalId":303036,"journal":{"name":"Linköping Studies in Science and Technology. Licentiate Thesis","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116432166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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