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Multiscale Modeling of Thermomechanical Loads in the Broaching of Direct Aged Inconel 718
The broaching process remains an essential machining process when manufacturing fir tree slots in turbine disks for aircraft engines. The cost- and time-intensive experiment-based approach restricts the application of alternative cutting tool materials when broaching nickel-based alloys. Given the accuracy and computation time, the developed model-based multiscale approach presents great advantages in prediction of the broaching process and thus can accelerate the development process.
Web Information Systems Engineering – WISE 2017
The two-volume set LNCS 10569 and LNCS 10570 constitutes the proceedings of the 18th International Conference on Web Information Systems Engineering, WISE 2017, held in Puschino, Russia, in October 2017. The 49 full papers and 24 short papers presented were carefully reviewed and selected from 195 submissions. The papers cover a wide range of topics such as microblog data analysis, social network data analysis, data mining, pattern mining, event detection, cloud computing, query processing, spatial and temporal data, graph theory, crowdsourcing and crowdsensing, web data model, language processing and web protocols, web-based applications, data storage and generator, security and privacy, sentiment analysis, and recommender systems.
Database Systems for Advanced Applications
This two-volume set LNCS 10827 and LNCS 10828 constitutes the refereed proceedings of the 23rd International Conference on Database Systems for Advanced Applications, DASFAA 2018, held in Gold Coast, QLD, Australia, in May 2018. The 83 full papers, 21 short papers, 6 industry papers, and 8 demo papers were carefully selected from a total of 360 submissions. The papers are organized around the following topics: network embedding; recommendation; graph and network processing; social network analytics; sequence and temporal data processing; trajectory and streaming data; RDF and knowledge graphs; text and data mining; medical data mining; security and privacy; search and information retrieval; query processing and optimizations; data quality and crowdsourcing; learning models; multimedia data processing; and distributed computing.
Modeling the Material Behavior under Metal Cutting Conditions
The scientific goal of the present work was to model the workpiece material behavior of steels in the metal cutting process depending on the occurring thermo-mechanical loads. The results of this work shall make a significant contribution to the predictive process design of the cutting process by means of Finite Element (FE) simulations for the virtual representation of the reality in the sense of the digital twin. To achieve the objective, extensive empirical examinations were conducted in a first step, which included conventional material scientific and orthogonal cutting tests. This enabled the establishment of a database of the workpiece response with increasing thermo-mechanical loads. ...
Surface Anomalies in Turning of Difficult-to-Cut Materials with High-Pressure Coolant Supply
This thesis presents the underlying mechanisms for the occurrence of surface anomalies in turning of difficult-to-cut materials with high-pressure coolant supply. Based on empirical and analytical investigations of each type of surface anomaly, the cause-and-effect relationships between the relevant process parameters and the surface quality were identified, translated into an explanation model and validated in a case study. Finally, an overview of different possibilities for anomaly-free machining with high-pressure coolant supply were discussed.
Prädiktive Werkzeug- und Prozessauslegung für das Räumen von Nickelbasislegierungen
Die Fertigung komplexer Profilnutgeometrien in Triebwerksscheiben erfolgt in der Serienfertigung nahezu ausschließlich durch das Fertigungsverfahren Räumen. Allerdings sind die anwendbaren Schnittgeschwindigkeiten und Spanungsdicken und damit die Produktivität aufgrund der relativ geringen Warmhärte des Schneidstoffes Schnellarbeitsstahl eingeschränkt. Eine Alternative zur Erhöhung der Produktivität und zur Kostenreduzierung birgt die Verwendung Hartmetallen. Allerdings verfügen diese über nur über eine geringe Zähigkeit, was eine angepasste Werkzeugkonstruktion erfordert.
Proceedings of the 26th International Symposium on Advancement of Construction Management and Real Estate
This book of CRIOCM 2021 (26th International Conference on Advancement of Construction Management and Real Estate) presents the latest developments in real estate and construction management around the globe. The conference was organized by the Chinese Research Institute of Construction Management (CRIOCM) working in close collaboration with Tsinghua University. Written by international academics and professionals, the book discusses the latest achievements, research findings and advances in frontier disciplines in the field of construction management and real estate. Covering a wide range of topics, including building information modeling, big data, geographic information systems, housing policies, management of infrastructure projects, intelligent construction and smart city, real estate finance and economics and urban planning and sustainability, the discussions provide valuable insights into the implementation of advanced construction project management and real estate market in China and abroad. The book offers an outstanding resource for academics and professionals.
