TY - CONF A1 - Pittner, Andreas A1 - Schürmann, Karsten T1 - Quantifizierung der Einflüsse aus Fertigungsautomatisierung und Innenschweißen auf die Ermüdungsfestigkeit von Hohl-profilknoten für Offshore-Windenergieanlagen N2 - In diesem Vortrag werden aktuellen Forschungsarbeiten bezüglich der Digitalisierung der schweißtechnischen Fertigungskette dargestellt. Anwendungsbeispiel ist das automatisierte Schweißen von Hohlprofilknoten, welche für die Fertigung von Jacket-Gründungsstrukturen für Offshore Windenergieanlagen eingesetzt werden. Besonderer Fokus liegt hierbei auf der Datenübergabe an nachgelagerter Prozessschritte bzw. externe Forschungspartner. Die Rückverfolgbarkeit des Fertigungsprozesses ermöglicht die zeitliche und räumliche Zuordnung von Prozessparametern (elektrische Signale) zu geometrischen Eigenschaften der Schweißnaht (Kerbgeometrie) bis hin zur numerisch berechneten Lebensdauer. T2 - Forschungsvereinigung Stahlanwendung e.V. - Sitzung des Projekt begleitenden Ausschuss - FOSTA P1178 "FatInWeld" CY - Europipe - Mühlheim a.d.R., Germany DA - 20.06.2018 KW - Digitalisierung KW - Adaptive MSG-Lichtbogenprozesse KW - Prozesskette KW - Offshore wind KW - Ermüdungsfestigkeit PY - 2018 AN - OPUS4-46639 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schaumann, P. A1 - Schürmann, K. A1 - Dänekas, C. A1 - Rethmeier, Michael A1 - Schippereit, Christian A1 - Pittner, Andreas T1 - Automatisierte Fertigung von Hohlprofilknoten für Jacket-Gründungsstrukturen T1 - Automated manufacturing of tubular joints for jacket support structures - Description of the welding process chain as well as integration of the process parameters within the fatigue design N2 - The development within the offshore wind energy sector towards more powerful turbines combined with increasing water depth for new wind parks is challenging both, the designer as well as the manufacturer of support structures. Besides XL-monopiles the jacket support structure is a reasonable alternative due to the high rigidity combined with low material consumption. However, the effort for manufacturing of the hollow section joints reduces the economic potential of jacket structures significantly. Therefore, a changeover from an individual towards a serial production based on automated manufactured tubular joints combined with standardized pipes must be achieved. Hence, this paper addresses the welding process chain of automated manufactured tubular joints including digitization of the relevant manufacturing parameters such as laser scanning of the weld seam geometry. Additionally, a methodology for the computation of the notch radius as well as the weld seam angle is presented based on the scanned profiles of three analysis points of an automated manufactured tubular X-joint. Subsequently, these parameters are considered within the notch stress approach based fatigue design and their impact is quantified by a comparison with the structural stress approach using equivalent stress concentration factors. KW - Hohlprofilknoten KW - Tubular joints KW - Automatisierte Fertigung KW - Digitalisierung KW - Schweißnahtgeometrie KW - Kerbspannungskonzept KW - Äquivalente Spannungskonzentrationsfaktoren KW - Automated manufacturing KW - Digitization KW - Weld seam geometry KW - Notch stress approach KW - Equivalent stress concentration factors PY - 2018 DO - https://doi.org/10.1002/stab.201810017 SN - 0038-9145 SN - 1437-1049 VL - 87 IS - 9 SP - 897 EP - 909 PB - Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG CY - Berlin AN - OPUS4-46633 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Deumer, J. A1 - Andresen, Elina A1 - Gollwitzer, C. A1 - Schürmann, R. A1 - Resch-Genger, Ute T1 - Adding More Shape to Nanoscale Reference Materials-LiYF4:Yb,Tm Bipyramids as Standards for Sizing Methods and Particle Number Concentration N2 - The increasing industrial use of nanomaterials calls for the reliable characterization of their physicochemical key properties like size, size distribution, shape, and surface chemistry, and test and reference materials (RMs) with sizes and shapes, closely matching real-world nonspheric nano-objects. An efficient strategy to minimize efforts in producing nanoscale RMs (nanoRMs) for establishing, validating, and standardizing methods for characterizing nanomaterials are multimethod nanoRMs. Ideal candidates are lanthanide-based, multicolor luminescent, and chemically inert nanoparticles (NPs) like upconversion nanoparticles (UCNPs), which can be prepared in different sizes, shapes, and chemical composition with various surface coatings. This makes UCNPs interesting candidates as standards not only for sizing methods, but also for element-analytical methods like laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS), quantitative bioimaging methods like X-ray fluorescence computed tomography (XFCT), and luminescence methods and correlative measurements. Here, we explore the potential of two monodisperse LiYF4:Yb,Tm bipyramids with peak-to-peak distances of (43 ± 2) nm and (29 ± 2) nm as size standards for small-angle X-ray scattering (SAXS) and tools for establishing and validating the sophisticated simulations required for the analysis of SAXS data derived from dispersions of nonspheric nano-objects. These SAXS studies are supplemented by two-dimensional (2D)-transmission electron microscopy measurements of the UCNP bipyramids. Additionally, the particle number concentration of cyclohexane dispersions of these UCNP bipyramids is determined by absolute SAXS measurements, complemented by gravimetry, thermogravimetric analysis (TGA), and inductively coupled plasma optical emission spectrometry (ICP-OES). This approach enables traceable particle number concentration measurements of ligand-capped nonspheric particles with unknown chemical composition. KW - Fluorescence KW - Upconversion nanoparticles KW - SAXS KW - Particle number concentration KW - Reference material KW - Traceability KW - Quality assurance KW - Quantum yield KW - Spectroscopy KW - Synthesis KW - Quantification KW - NanoRM KW - Nano KW - Particle KW - Bipyramid KW - Reference data KW - Simulation PY - 2024 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-617940 DO - https://doi.org/10.1021/acs.analchem.4c03641 SP - 1 EP - 8 PB - ACS Publications AN - OPUS4-61794 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Automatically Welded Tubular X-Joints - Welding Procedure and Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper ad-dresses the welding process of automated manufactured tubular X-joints. Additionally, fatigue tests of the automatically welded tubular joints are presented focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch con-sidering the structural stress approach as well as the notch stress ap-proach. T2 - 29th International Ocean and Polar Engineering Conference CY - Honolulu, Hawaii, USA DA - 16.06.2019 KW - Notch stress approach KW - Tubular X-joints KW - Automated manufacturing KW - Fatigue tests KW - Structural stress approach PY - 2019 SN - 978-1-880653-85-2 SP - 4098 EP - 4105 AN - OPUS4-51848 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Prediction of the Initial Fatigue Crack Location of Automatically Welded Tubular Joints for Jacket Support Structures N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints com-bined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatical-ly welded tubular X-joints focusing on the location of the technical fatigue crack. For this X-joint, the detect-ed location of the technical crack is then compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Additionally, the fatigue prone hot spot according to both approaches is compared for a typical offshore jacket double-K-joint to emphasize the significance of the presented outcomes for the existing offshore structures. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - 7th International Conference on Structural Engineering, Mechanics and Computation (SEMC) CY - Cape Town, SOUTH AFRICA DA - 02.09.2019 KW - Lightweight Design KW - Jacket Support Structures KW - Arc Welding Automation KW - Fatigue KW - Offshore Wind PY - 2019 SN - 978-1-138-38696-9 DO - https://doi.org/10.1201/9780429426506-100 VL - 2019 SP - 575 EP - 580 AN - OPUS4-51847 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Automatically Welded Tubular X Joints for Jacket Substructures – Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatically welded tubular X-joints focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - Nordic Steel 2019 CY - Copenhagen, Denmark DA - 18.09.2019 KW - Automated arc welding KW - Fatigue tests KW - Tubular X-joints KW - Technical crack detection KW - Local fatigue approaches PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-518490 DO - https://doi.org/10.1002/cepa.1140 VL - 3 IS - 3-4 SP - 823 EP - 828 PB - Wiley-VCH Verlag GmbH on behalf of Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG CY - Berlin AN - OPUS4-51849 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schürmann, K. T1 - Fatigue resistance of automatically welded tubular X-joints for jacket support structures N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints com-bined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatical-ly welded tubular X-joints focusing on the location of the technical fatigue crack. For this X-joint, the detect-ed location of the technical crack is then compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Additionally, the fatigue prone hot spot according to both approaches is compared for a typical offshore jacket double-K-joint to emphasize the significance of the presented outcomes for the existing offshore structures. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - 9th International Conference Offshore Foundations CY - Bremen, Germany DA - 09.07.2019 KW - Notch stress approach KW - Fatigue tests KW - Automated manufacturing KW - Tubular X-joints KW - Structural stress approach PY - 2019 AN - OPUS4-51874 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schürmann, K. T1 - Prediction of the Initial Fatigue Crack Location of Automatically Welded Tubular Joints for Jacket Support Structures N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints com-bined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatical-ly welded tubular X-joints focusing on the location of the technical fatigue crack. For this X-joint, the detect-ed location of the technical crack is then compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Additionally, the fatigue prone hot spot according to both approaches is compared for a typical offshore jacket double-K-joint to emphasize the significance of the presented outcomes for the existing offshore structures. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - 7th International Conference on Structural Engineering, Mechanics and Computation (SEMC) CY - Cape Town, SOUTH AFRICA DA - 02.09.2019 KW - Arc welding automation KW - Fatigue tests KW - Tubular X-joints KW - Technical crack detection KW - Local fatigue approaches PY - 2019 AN - OPUS4-51872 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schürmann, K. T1 - Automatically Welded Tubular X-Joints –Welding Procedure and Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper ad-dresses the welding process of automated manufactured tubular X-joints. Additionally, fatigue tests of the automatically welded tubular joints are presented focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. T2 - ISOPE-2019 Honolulu Conference The 29th International Ocean and Polar Engineering Conference CY - Honolulu, Hawaii, USA DA - 16.06.2019 KW - Notch stress approach KW - Tubular X-joints KW - Automated manufacturing KW - Fatigue tests KW - Structural stress approach PY - 2019 AN - OPUS4-51870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schürmann, K. T1 - Automatically Welded Tubular X-Joints for Jacket Substructures – Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatically welded tubular X-joints focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - Nordic Steel 2019 CY - Copenhagen, Denmark DA - 18.09.2019 KW - Arc welding automation KW - Tubular X-joints KW - Fatigue tests KW - Technical crack detection KW - Local fatigue approaches PY - 2019 AN - OPUS4-51871 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -