Design Rules for Laser Beam Melted Particle Dampers

By means of additive manufacturing, especially laser powder bed fusion, particle dampers can be integrated locally into structural components and thus significantly reduce component vibrations. However, detailed design recommendations for additively manufactured particle dampers do not yet exist. The research question in this paper is: How can the effect of particle damping be described as a function of excitation force, cavity width and cavity length? For beams made of AlSi10Mg, it is shown that a powder-filled cavity of 2.5% to 5% is sufficient to increase the damping by more than x10

Density-Based Topology Optimization for a Defined External State of Stress in Individualized Endoprosthesis

Endoprosthesis are exposed to the risk of aseptic loosening. The design of the prosthesis shaft to achieve physiological force application is therefore of great importance. Additive manufacturing offers the potential to fabricate highly variable topologies, but challenges the designer with a large number of design variables. In this work, a method is developed to determine an optimized density topology that approximates a given mechanical stress state in the bone after implantation. For this purpose, a topology optimization of the density distribution of the implant is performed

Feasibility Evaluation of Milling Designs Using Multi-Agent Systems

During product development, many decisions have to be made that affect the entire product life cycle and often lead to errors that cause additional effort. To proactively support the engineer in evaluating his design in a CAD program, in this paper an approach to evaluate milling designs using a multi-agent system (MAS) is presented. The CommonKADS method is used and the MAS is validated against an application example of a gearbox housing that has been checked for design guidelines, standards, and tool or machine portfolios

Knowledge-Based Assistance System for Part Preparation in Additive Repair by Laser Powder Bed Fusion

For the economic use of repair in the spare parts business, additive repair by Laser Powder Bed Fusion (LPBF) is a promising technology. As material can only be applied to a flat surface in LPBF, prior machining is required. The selection of the section plane requires expert knowledge, though. To provide that knowledge and recommend a suitable section plane, an expert system can be used. In this paper, a concept for such an expert system is presented and its functionality is evaluated by an example

Knowledge Annotation within Research Data Management System for Oxygen-Free Production Technologies

The comprehensive implementation of digital technologies in product manufacturing leads to changes in engineering processes and requires new approaches to data management. An important role belongs to the processes of organizing the collection, storage and reuse of research data obtained and used in the process of product, system or technology development, taking into account the FAIR data principles. This article describes a Research Data Management System for the organization of documentation and measurement requests in the research and development of new oxygen-free production technologies

Thermische und strukturelle Analyse von Polymermaterialen in generativ gefertigten Optomechaniken für den Einsatz in der Laserentwicklung

Die traditionelle Laserentwicklung basiert auf einer Vielzahl von diskreten Bauteilen mit thermischer, struktureller oder optomechanischer Funktionalität. Durch die Kombination von innovativen Designkonzepten mit der additiven Fertigung wird die kostengünstige Herstellung hochkomplexer optischer Systeme in funktionsintegrierten Bauteilen erstmals möglich. Während generative Fertigungsverfahren, wie die sogenannte Fused Filament Fabrication (FFF), im Bereich der Strukturbauteile bereits weit verbreitet sind, ist deren Potenzial zum Multi-Materialdruck für die Funktionsintegration nahezu unerforscht. In diesem Beitrag werden verschiedene polymerbasierte Materialien und Materialkombinationen für den FFF 3D-Druck hinsichtlich ihrer thermischen und strukturellen Eigenschaften untersucht und ihre Eignung für die Anwendung in der Laserentwicklung evaluiert