PUMA publications for /tag/ProcessTue Jul 02 11:28:25 CEST 2024jan2018 National Conference of the United States Association for Small Business and Entrepreneurship, USASBE 2018 ; Conference date: 10-01-2018 Through 14-01-2018The Learning Process in Technology Entrepreneurship Education – Insights from an Engineering Degree2018Entrepreneurship Entrepreneurship, Learning Process Technology education, Fri Feb 02 08:07:58 CET 2024Procedia CIRP216–221Tool condition monitoring in drilling processes using anomaly detection approaches based on control internal data1212024analysis anomaly condition detection learning machine machining manufacturing monitoring networks neural process series time tool Wed Jan 31 13:29:04 CET 202428. Stuttgarter KunststoffkolloquiumSept23151-157Validation of the Manufacturing Methodology of Prestressed Fiber-Reinforced Polymer Concrete by the Variation of Process Parameters162023born composite concrete itft manufacturing polymer process wegner Polymer concrete has proved to be advantageous in machine building for many years thanks to its excellent damping properties. Until now, its use was limited to machine beds due to its comparatively low tensile strength. Its use in moving structural components has not been possible until now. Recent research results have shown that this challenge can be met by integrating prestressed carbon fibers. Until now, the production of samples out of prestressed fiber-reinforced polymer concrete has been carried out according to fixed specifications. It is not yet clear whether these specifications are suitable to fully exploit the potential of the material. Samples manufactured to these specifications show at least a large scatter in bending stiffness. Within the scope of this paper, the existing manufacturing process is validated by the variation of process steps. Specifically, this involved the use of a shaker, variation of the dwell time in the mold, variation of the resin content, and the procedure for impregnating the fibers. The characterization of the samples showed that the scatter could only be reduced by increasing the dwell time. However, this leads to a decrease in bending stiffness and, thus, is not suitable for further improvement of the novel material.Wed Jan 10 14:09:31 CET 2024Applied Sciences2210989Tailored Lace : Moldless Fabrication of 3D Bio-Composite Structures through an Integrative Design and Fabrication Process1120212021 3D architecture baszynski bio-composite biomat craft dahy design digital fabrication integrative itke lace lehrecke moldless process structure tailored tucker This research demonstrates an integrative computational design and fabrication workflow for the production of surface-active fibre composites, which uses natural fibres, revitalises a traditional craft, and avoids the use of costly molds. Fibre-reinforced polymers (FRPs) are highly tunable building materials, which gain efficiency from fabrication techniques enabling controlled fibre direction and placement in tune with load-bearing requirements. These techniques have evolved closely with industrial textile processes. However, increased focus on automation within FRP fabrication processes have overlooked potential key benefits presented by some lesser-known traditional techniques of fibre arrangement. This research explores the process of traditional bobbin lace-making and applies it in a computer-aided design and fabrication process of a small-scale structural demonstrator in the form of a chair. The research exposes qualities that can expand the design space of FRPs, as well as speculates about the potential automation of the process. In addition, Natural Fibre-Reinforced Polymers (NFRP) are investigated as a sustainable and human-friendly alternative to more popular carbon and glass FRPs.Wed Jan 10 14:09:31 CET 2024Applied Sciences2210989Tailored Lace : Moldless Fabrication of 3D Bio-Composite Structures through an Integrative Design and Fabrication Process1120212021 3D architecture baszynski bio-composite biomat craft dahy design digital fabrication integrative itke lace lehrecke moldless process structure tailored tucker This research demonstrates an integrative computational design and fabrication workflow for the production of surface-active fibre composites, which uses natural fibres, revitalises a traditional craft, and avoids the use of costly molds. Fibre-reinforced polymers (FRPs) are highly tunable building materials, which gain efficiency from fabrication techniques enabling controlled fibre direction and placement in tune with load-bearing requirements. These techniques have evolved closely with industrial textile processes. However, increased focus on automation within FRP fabrication processes have overlooked potential key benefits presented by some lesser-known traditional techniques of fibre arrangement. This research explores the process of traditional bobbin lace-making and applies it in a computer-aided design and fabrication process of a small-scale structural demonstrator in the form of a chair. The research exposes qualities that can expand the design space of FRPs, as well as speculates about the potential automation of the process. In addition, Natural Fibre-Reinforced Polymers (NFRP) are investigated as a sustainable and human-friendly alternative to more popular carbon and glass FRPs.Tue Dec 19 09:29:56 CET 2023MIC Procedia (2023)november57-64Process Stability Monitoring - Potential of Internal Control Data for Drilling Processes in the Aerospace IndustryConference Paper2023control-data correlation data drilling monitoring myown process sensor-data Machining of complex parts for aerospace applications is still problematic. Multiple effects have an influence on the quality of the manufactured parts: Vibrations, tool wear and material properties such as the hardness of (e.g.) new high-temperature materials to name but a few. Especially the geometrical and material related properties of aerospace parts such as turbine blades suffer under these effects, which can result in out of tolerance geometrical dimensions and surface roughness that degrade the performance. Researchers in manufacturing make use of sensors with high sampling frequency to investigate and react to these influences. In contrast, the digitalization of machine control devices and their internal servo control cycles has the potential to substitute these sensors while still being financially more viable options. Additionally, they enable users to integrate the device vertically and horizontally into the factory environment, which enables in-line quality tracking and anomaly surveillance. However, lower sampling frequencies and distance from the process area are disadvantages of this approach. This paper investigates the substitution potential of internal control data for the machining process. The investigation focuses on drilling processes. Process-relevant sensor data such as forces, accelerations and acoustic emissions are measured in addition to NC servo control data. Through correlating internal and external data as well as surface and geometrical properties, the paper will give recommendations as to whether certain sensors can be successfully substituted by internal control data.Mon Nov 27 15:10:57 CET 2023Stuttgart3. {DAfStb}-{Jahrestagung} mit 56. {Forschungskolloquium}, 11.-12. {November} 2015, {Stuttgart}31--38Implantate für {Bauteile} aus {UHFFB}2015analysis automated chain, components, concrete functionally graded parameter process sobek Der materiellen Entwicklung des ultrahochfesten Betons (UHFB) folgend wurde am ILEK der Universität Stuttgart eine punktuelle Fügetechnik für dünnwandige Bauteile aus faserbewehrtem UHFB mittels Einbauateilen, sogenannten Implantaten, entwickelt. Den baupraktisch relevanten Vorteilen dieser punktuellen Fügetechnik steht ihr spezifischer Nachteil entgegen, das Auftreten von Spannungskonzentrationen im Bereich der Fügung. Der Fokus bei der Entwicklung der Implantate lag daher darauf, durch deren geometrische, materielle und konstruktive Ausbildung die resultierenden Spannungskonzentrationen im Bereich der Fügestelle so zu manipulieren, dass die materiellen Eigenschaften der zu fügenden UHFFB-Bauteile maximal ausgenutzt und damit hohe Lasten abgetragen werden können.Mon Nov 27 15:10:57 CET 2023Stuttgart3. {DAfStb}-{Jahrestagung} mit 56. {Forschungskolloquium}, 11.-12. {November} 2015, {Stuttgart}9--14Übersicht über die {Forschungen} am {ILEK} im {Bereich} {Leichtbau}2015analysis automated chain, components, concrete functionally graded parameter process sobek Dieser Beitrag gibt einen Überblick über die Forschungsbereiche und Tätigkeiten am Institut für Leichtbau Entwerfen und Konstruieren (ILEK) im Bereich Leichtbau. In nachfolgenden Beiträgen werden einige der diesbezüglichen Forschungsprojekte detaillierter dargestellt.Mon Nov 27 15:10:57 CET 2023Engineered {Transparency} 2016: {Glass} in {Architecture} and {Structural} {Engineering}, {September} 20-21, 2016, {Düsseldorf}213--222Prototype of an adaptive glass façade with vertically prestressed cables2016analysis automated chain, components, concrete functionally graded parameter process sobek This paper discusses a prototype of an adaptive glass façade. The load-bearing structure of the 4.9 m high façade consists of double cables. Horizontal deflections are reduced by placing active components in between two vertical cable lines. These components are acting in the direction perpendicular to the cable axis resulting in a decrease of required prestressing forces and thus reducing the amount of material in the structure. The paper focuses on the structure and the functions of the adaptive façade.Mon Nov 27 15:10:57 CET 2023Stuttgart3. {DAfStb}-{Jahrestagung} mit 56. {Forschungskolloquium}, 11.-12. {November} 2015, {Stuttgart}23--30Herstellung von {Freiform}-{Betonbauteilen} mittels einer gefrorenen {Schalung} aus {Wasser} und {Sand}2015analysis automated chain, components, concrete functionally graded parameter process sobek Die Herstellung von Freiform-Betonbauteilen erfordert meist eine große Menge nicht wiederverwendbarer Schalungsmaterialien. Im vorliegenden Aufsatz wird eine neu entwickelte Methode für die abfallfreie Produktion frei geformter Betonbauteile auf einer gefrorenen Schalung aus Wasser und Sand vorgestellt. Im festen, gefrorenen Zustand kann die Schalung unter Zuhilfenahme von CAM-Methoden gräzise in annähernd beliebige Schalungsgeometrien überführt werden. Nach dem Aushärten der Bauteile kann das Schalungsmaterial durch Auftauen vollständig zurückgewonnen und beliebig oft wiederverwendet werden. Zusätzlich zur Beschreibung der Methode werden exemplarischen Bauteile vorgestellt und deren Formtreue und Qualität diskutiert.Mon Nov 27 15:10:57 CET 2023Stuttgart3. {DAfStb}-{Jahrestagung} mit 56. {Forschungskolloquium}, 11.-12. {November} 2015, {Stuttgart}137--143Dichteanpassbare {Betongemische} für das {Trockenspritzen} von gradierten {Bauteilen}2015analysis automated chain, components, concrete functionally graded parameter process sobek Mon Nov 27 15:10:57 CET 2023Stuttgart3. {DAfStb}-{Jahrestagung} mit 56. {Forschungskolloquium}, 11.-12. {November} 2015, {Stuttgart}15--22Entwurf und automatisierte {Herstellung} von {Bauteilen} aus funktional gradiertem {Beton}2015analysis automated chain, components, concrete functionally graded parameter process sobek Durch eine funktionale Gradierung kann die innere Struktur von Bauteilen entsprechend den jeweils gegebenen statischen und /oder bauphysikalischen Anforderungen optimiert werden. Hierdurch entstehen Optimalstrukturen mit einem Minimum an Gewicht und folglich auch mit reduziertem Ressourcen- und Energieverbrauch. Die Definition der statischen Anforderungen im Bauteil wird mit Hilfe numerischer entwurfsmethoden bestimmt. Hieraus ergibt sich das sogenannte Gradientenlayout als digitaler Bauplan, der dem Applikationssystem übergeben werden kann. Die Entwicklung zweier Basismischungen mit stark unterschiedlichen Eigenschaften bildet die betontechnologische Grundlage zur automatisierten Herstellung von funktional gradierten Betonbauteilen. Mit der Gradietensprühtechnik kann das gesamte Eigenschaftsspektrum zwischen den beiden Basismischungen abgebildet werden. Eine automatisierte Prozesssteuerung und -regelung der Betontechnologie und die gezielte Materialapplikation mit einem Mahrachsmanipulator stellen die exakte Reproduzierbarkeit der Bauteile sicher.Mon Nov 27 15:10:57 CET 2023Engineered {Transparency} 2016: {Glass} in {Architecture} and {Structural} {Engineering}, {September} 20-21, 2016, {Düsseldorf}309--316Building {Doha} - {Qatars} iconic façade projects2016analysis automated chain, components, concrete functionally graded parameter process sobek Mon Nov 27 15:10:57 CET 2023Tall \& {Green}: {Typology} for a {Sustainable} {Urban} {Future}, 8th {CTBUH} {World} {Congress}, {March} 3-5, 2008, {Dubai}, {UAE}114--119Sustainable tall buildings - some introductory remarks2008analysis automated chain, components, concrete functionally graded parameter process sobek This paper considers the basic requirements neede to achieve truly sustainable buildings. It discusses possible ways of modifying the cooperation between all project partners responsible for the implementation of a green design. It further identifies the concept of triple zero as a new approach towards vital ecological issues. The paper also proposes a new certification procedure offering a comprehensive assessment and classification of sustainable tall buildings.Mon Nov 27 15:10:57 CET 2023Bochum1. {DAfStb}-{Jahrestagung} mit 54. {Forschungskolloquium}, 07.-08. {November} 2013, {Bochum}41--46Optimalstrukturen aus funktional gradiertem {Beton} - {Entwurf}, {Berechnung} und automatisierte {Herstellung}2013analysis automated chain, components, concrete functionally graded parameter process sobek Mon Nov 27 15:10:57 CET 2023Future {Visions}, {IASS} {Symposium}, {August} 17-20, 2015, {Amsterdam}, {The} {Netherlands}Paper 501665Automated spraying of functionally graded concrete components - {Analysis} of the process parameters2015analysis automated chain, components, concrete functionally graded parameter process sobek Graded concrete components exhibit the beneficial property of adaptive material characteristics and, therefore, can be customized for predominant load profile in terms of structure or building-physical requirements. Functionally grading the components interior through a continuously variable alteration of the porosity can be employed to minimise the mass and to attain multifunctional characteristics. A complete automation of the process chain from the design to the manufacturing of functionally graded concrete components is developed currently in an interdisciplinary cooperation by the Institutes for System Dynamics (ISYS), Construction Materials (IWB) and Lightweight Structures and Conceptual Design (ILEK) at the University of Stuttgart, see [1], [2]. The joint research project „Optimal structures made from functionally graded concrete” is part of the major German Research Foundation Programme 1542 „Lightweight construction with concrete“. The starting point in grading is the technological development of two concrete reference mixes with contrary characteristics. By employing dry spraying as manufacturing procedure the entire range of characteristics between the oppositional reference mixes can be obtained. Construction components can be produced in an automated manufacturing procedure combined with a suitable process control by applying the concrete with a multi-axis manipulator. However, the material technology, the application technique, and the overall machine concept for the spray concrete technique influence the manufacturing procedure of the functionally graded concrete construction components in a major way. Moreover, these factors have decisive effects on the quality of the sprayed concrete, its rebound behavior and the dust formation. In the following, a detailed analysis of the process determining parameters (i.e. the quantity of supplied air, the type of water supply or the nozzle position and movement) is presented, especially with regard to reproducible component production.Fri Jul 02 14:42:04 CEST 2021MM Science Journal34556-4562IN-PROCESS MEASUREMENT AND NUMERICAL DETERMINATION OF THE TEMPERATURE IN THE CONTACT ZONE DURING SINGLE LIP DEEP HOLE DRILLING2021ifw measurement myown process temperature Wed Sep 09 09:23:14 CEST 2020Comparative Study of a Biomechanical Model-based and Black-box Approach for Subject-Specific Movement PredictionPublication2020gaussian grk2198 isw process Mon Jun 15 15:02:15 CEST 2020Monitoring of the Drying Process of Power Transformers Using Dielectric Response Analysis2011Analysis Dielectric Drying Monitoring Power Process Response Transformers Using Mon Jun 15 14:23:04 CEST 2020Monitoring the water content in power transformers during oven drying process2011Monitoring content drying oven power process transformers water ProcessCommunity for tag(s) Process