Filtern
Erscheinungsjahr
Dokumenttyp
- Vortrag (45)
- Zeitschriftenartikel (43)
- Beitrag zu einem Tagungsband (23)
- Beitrag zu einem Sammelband (4)
- Forschungsbericht (4)
- Buchkapitel (2)
- Dissertation (1)
- Posterpräsentation (1)
- Forschungsdatensatz (1)
Sprache
- Englisch (68)
- Deutsch (54)
- Mehrsprachig (1)
- Serbisch (1)
Schlagworte
- Grain refinement (7)
- Neural networks (7)
- Welding simulation (7)
- Aluminium (6)
- Digitalisierung (6)
- Welding (6)
- Ökobilanzierung (6)
- Gründungsstrukturen (5)
- Laser beam welding (5)
- Leichtbau (5)
- Mechanical properties (5)
- Additive manufacturing (4)
- Automatisierte Fertigung (4)
- DED-Arc (4)
- Fatigue tests (4)
- Inverse heat conduction problem (4)
- Lichtbogensensorik (4)
- MSG-Schweißen (4)
- Offshore Windenergieanlagen (4)
- Tubular X-joints (4)
- Arc welding (3)
- Aufgelöste Tragstrukturen (3)
- Automated manufacturing (3)
- Friction stir welding (3)
- GMAW (3)
- GTA welding (3)
- Life Cycle Assessment (3)
- MSG-Engspaltschweißen (3)
- Notch stress approach (3)
- Offshore Windenergie (3)
- Prozesskette (3)
- Residual stress (3)
- Schweißverfahren (3)
- Temperature field generation (3)
- Umweltwirkungen (3)
- WAAM (3)
- Al Ti5B1 (2)
- Alloy 1050A (2)
- Alloy 5083 (2)
- Alloy 6082 (2)
- Arc Welding Automation (2)
- Arc-sensing (2)
- Automated welding (2)
- Automatisierte schweißtechnische Fertigung (2)
- Columnar to equiaxed transition (CET) (2)
- Digitalization (2)
- Energy efficiency (2)
- Ermüdungsfestigkeit (2)
- FEA (2)
- Fatigue (2)
- Festigkeit (2)
- Forschungsdatenmanagement (2)
- GMA-laser hybrid welding (2)
- GMAW control (2)
- Gas metal arc welding (2)
- Gas tungsten arc welding (GTAW) (2)
- Global optimisation (2)
- High power welding (2)
- High-strength low-alloy steel (2)
- Hochfeste Feinkornbaustähle (2)
- Hochleistungsschweißen (2)
- Inverse modelling (2)
- Jacket Support Structures (2)
- Künstliche neuronale Netze (2)
- Laser arc-hybrid welding (2)
- Laserstrahlschweißen (2)
- Life Cycle Assessment (LCA) (2)
- Life cycle assessment (2)
- Life cycle assessment (LCA) (2)
- Lightweight Design (2)
- MAG Prozesssteuerung (2)
- Magnetic stray field (2)
- Model prediction (2)
- Multiple experiments (2)
- Narrow gap GMAW (2)
- Neural Networks (2)
- Neutron diffraction (2)
- Offshore Wind (2)
- Offshore wind (2)
- Open science (2)
- Optimization (2)
- Profilvermessung (2)
- Resource efficiency (2)
- Rissbildung (2)
- Schweißen (2)
- Short calculation time (2)
- Stochastic search method (2)
- Structural stress approach (2)
- TIG-welding (2)
- Technical crack detection (2)
- Temperature (2)
- Tensile tests (2)
- Transformable steels (2)
- Verfahrensvergleich (2)
- Volume heat source (2)
- Werkstofffragen (2)
- Wire arc additive manufacturing (2)
- Acicular ferrite (1)
- Adaptive MSG-Lichtbogenprozesse (1)
- Adaptive MSG-Lichtbogenschweißprozesse (1)
- Adaptive control (1)
- Adative arc welding processes (1)
- Additive Manufacturing (1)
- Al-Mg-Si (1)
- Al-Mg-Si-Legierungen (1)
- AlMg0.7SiTiB filler wire (1)
- Aluminium 6082 (1)
- Aluminium/Aluminiumlegierungen (1)
- Analysis techniques (1)
- Analytical Solution (1)
- Arc sensor (1)
- Artificial neural networks (1)
- Automated arc welding (1)
- Automation (1)
- Automatisierte schweißtechniche Fertigung (1)
- Automatisierung (1)
- Axial force (1)
- Bionik (1)
- Carbon dioxide footprint (1)
- Charpy toughness (1)
- Control system design (1)
- Cooling rate (1)
- Crack formation (1)
- Datenmanagement (1)
- Design of experiments (1)
- Digitalisation (1)
- Digitization (1)
- Dissimilar welding (1)
- Duplex nucleation theory (1)
- Dynamic fracture tests (1)
- Economic wide technology replacement (1)
- Eigenspannungen (1)
- Einfluss auf Schweißeigenspannungen (1)
- Elektromagnetische Schmelzbadsicherung (1)
- Energy density distribution (1)
- Energy input (1)
- Environment (1)
- Environmental impact categories (1)
- Epitaxial nucleation (1)
- Equivalent stress concentration factors (1)
- Ermüdung (1)
- Experimental validation (1)
- Fair salary (1)
- Fatigue life (1)
- Fertigung (1)
- Filler wires (1)
- Fracture (1)
- Functional analysis (1)
- Functional-analytical solution (1)
- Fusion welding (1)
- GMA welding (1)
- GMR (1)
- GMR sensors (1)
- GTAW (1)
- Gleeble experiments (1)
- Gleeble testing (1)
- Global Optimisation (1)
- Grade S960QL steel (1)
- Grain size (1)
- Greenhouse gas mitigation (1)
- HSLA (1)
- Hardly separable problem (1)
- Heat conduction (1)
- Heat flow (1)
- Heat transfer (1)
- Heissrisse (1)
- Heißrisse (1)
- High strength AlMgSi aluminium alloys (1)
- High strength steel (1)
- High-stength aluminium alloys (1)
- High-strength steel (1)
- Hochfester Stahl (1)
- Hohlprofilknoten (1)
- Human health (1)
- Human health G. (1)
- Hybrid laser arc welding (1)
- Implementierung (1)
- In-situ monitoring (1)
- Jacket foundations (1)
- Jacket-Gründungsstrukturen (1)
- Kerbspannungskonzept (1)
- Künstliche Intelligenz (1)
- LBW (1)
- LCA (1)
- Laser beams (1)
- Laser-MSG-Hybridschweißen (1)
- Leichtbauprinzipien (1)
- Lichtbogenschweißen (1)
- Life Cycle Assessment (LCA) Fusion welding (1)
- Life Cycle Assessment (LCA) Impact categories (1)
- Life Cycle Assessment (LCA) Schweißprozesse (1)
- Life Cycle Assessment (LCA) Umweltwirkungen (1)
- Life-cycle assessment (1)
- Lifetime (1)
- Lightweight principles (1)
- Local fatigue approaches (1)
- Local fatigue spproaches (1)
- Low carbon steel (1)
- MAG welding (1)
- MIG welding (1)
- Martensite start temperature (1)
- Material flow (1)
- Material modeling (1)
- Material questions (1)
- Materialmodellierung (1)
- Measurement (1)
- Mechanisch technologische Kennwerte (1)
- Mehrlagenschweißen (1)
- Metallurgische Fragen (1)
- Microcracking (1)
- Microstructure (1)
- Mikrorisse (1)
- Model calibration (1)
- Model order reduction (1)
- Modifizierte Sprühlichtbogenprozesse (1)
- Modifizierter Sprühlichtbogen (1)
- Multi-attribute decision method (1)
- Multi-criteria decision support (1)
- Multi-regional inputeoutput data (1)
- Narrow gap welding (1)
- Narrow-gap welding (1)
- Neural network (1)
- Non-destructive testing (1)
- Normen (1)
- Numerical simulation (1)
- Numerical welding simulation (1)
- Numerische Simulation (1)
- Offshore Wind energy (1)
- Offshore wind turbines (1)
- Open data (1)
- Open source (1)
- OpenScience (1)
- Optimisation (1)
- Phase transformation (1)
- Porosität (1)
- Precipitation hardening (1)
- Precipitation hardening aluminum alloys (1)
- Prior austenite grain size (1)
- Process innovations (1)
- Profile measurement (1)
- Proper generalized decomposition (1)
- Prozessregelung (1)
- Prozesssteuerung (1)
- Prozessüberwachung (1)
- Quality assurance (1)
- Quality control (1)
- Reduction of calculation time (1)
- Research data management (1)
- Residual stress and distortion (1)
- Resistance spot welding (1)
- Schutzgasschweißen (1)
- Schweißnahtfehler (1)
- Schweißnahtgeometrie (1)
- Schweißprozesse (1)
- Schweißsimulation (1)
- Schweißstruktursimulation (1)
- Schweißtechnik (1)
- Sensor (1)
- Sensorik (1)
- SimCoLas (1)
- Simulating (1)
- Social Life Cycle Assessment (SLCA) (1)
- Social life cycle assessment (SLCA) (1)
- Standards (1)
- Steel (1)
- Strain-rate (1)
- Strength (1)
- Stress-strain behavior (1)
- Structural welding simulation (1)
- Super martensitic filler material (1)
- Support structures (1)
- Sustainability assessment (1)
- TRIP (1)
- TRIP - transformation induced plasticity (1)
- Tandem Gas Metal Arc Welding (1)
- Tandem gas metal arc welding (1)
- Tandem welding (1)
- Tear tests (1)
- Temperature Field (1)
- Temperature Field Generation (1)
- Thermal analysis (1)
- Thermal energy generation (1)
- Thermo physical simulation (1)
- Thick metal plate welding (1)
- Tool torque (1)
- Transformation induced plasticity (TRIP) (1)
- Traverse force (1)
- Tubular joints (1)
- Ultrasonic vibration (1)
- Umwandlungsplastischen Konstante K (1)
- Umweltschutz (1)
- Verzug (1)
- Viscoplasticity (1)
- Volumetric heat source (1)
- Weld defects (1)
- Weld metal (1)
- Weld seam geometry (1)
- Welding costs (1)
- Welding process selection (1)
- Welding residual stresses (1)
- Welding-induced residual stress (1)
- Weldx (1)
- Wärmenachbehandlung (1)
- digital image correlation (1)
- dual phase steel (1)
- resistance spot welding (1)
- sensitivity analysis (1)
- welding residual stresses (1)
- Äquivalente Spannungskonzentrationsfaktoren (1)
- Ökobilanz (1)
Organisationseinheit der BAM
- 9 Komponentensicherheit (50)
- 9.3 Schweißtechnische Fertigungsverfahren (50)
- 7 Bauwerkssicherheit (7)
- 7.2 Ingenieurbau (4)
- 8 Zerstörungsfreie Prüfung (3)
- 5 Werkstofftechnik (2)
- 5.2 Metallische Hochtemperaturwerkstoffe (2)
- 7.7 Modellierung und Simulation (2)
- 8.5 Röntgenbildgebung (2)
- 5.1 Mikrostruktur Design und Degradation (1)
Eingeladener Vortrag
- nein (45)
Um den Klimawandel wirksam zu bekämpfen, ist es entscheidend, fossile Brennstoffe durch erneuerbare Energiequellen wie Wind-, Solar- und Wasserkraft sowie alternative Energieträger, beispielsweise grünen Wasserstoff, zu ersetzen. Offshore-Windenergie spielt hierbei eine zentrale Rolle, da sie dank der Kombination aus globaler Verfügbarkeit, relativ geringen Betriebskosten und fortgeschrittenem technischen Entwicklungsstand besonders geeignet ist, zur regenerativen Stromerzeugung beizutragen. Sie ist zudem ein Schlüsselelement für die Umsetzung des Europäischen Green Deals, der das Ziel verfolgt, bis 2050 Klimaneutralität in der EU zu erreichen. Expertenschätzungen zufolge ist eine Steigerung der aktuellen Kapazität von 25 GW im Jahr 2020 auf etwa 450 GW notwendig, um diese ambitionierten Ziele zu erfüllen.
Bei der Entwicklung zukünftiger Offshore-Windparks, insbesondere in tieferen Gewässern, gewinnen Jacket-Gründungsstrukturen an Bedeutung. Diese Strukturen, die eine höhere Steifigkeit bei geringerem Materialeinsatz im Vergleich zu den bisher vorherrschenden Monopile-Gründungen bieten, basieren auf komplexen, räumlich aufgelösten Konstruktionen, die ähnlich den Öl- und Gasplattformen entwickelt werden. Die Herstellung der Jacketknoten, die bislang überwiegend manuell geschweißt wurden, birgt erhebliches Optimierungspotential. Durch Automatisierung und Digitalisierung der Fertigungsprozesse könnten nicht nur die Effizienz gesteigert, sondern auch die Qualität der Endprodukte durch präzise Überwachung und Kontrolle der Produktionsparameter verbessert werden. Diese technologischen Fortschritte sind für die Skalierung der Offshore-Windenergie und die Erreichung der Klimaziele von entscheidender Bedeutung.
This study examines the relationship between the magnetic mesostructure with the microstructure of low carbon steel tungsten inert gas welds. Optical microscopy revealed variation in the microstructure of the parent material, in the heat affected and fusion zones, correlating with distinctive changes in the local magnetic stray fields measured with high spatial resolution giant magneto resistance sensors. In the vicinity of the heat affected zone high residual stresses were found using neutron diffraction.
Notably, the gradients of von Mises stress and triaxial magnetic stray field modulus follow the same tendency transverse to the weld. In contrast, micro-X-ray fluorescence characterization indicated that local changes in element composition had no independent effect on magnetic stray fields.
Die transiente nichtlineare 3D-Wärmeleitungsgleichung wurde zur numerischen Lösung mittels der Finite-Elemente-Methode im Ort und mittels explizitem Eulerschema in der Zeit diskretisiert. Der resultierende Algorithmus wurde in ein Computerprogramm überführt wobei besonderer Wert auf paralleles Rechnen gelegt wurde. Das Programm wurde auf die numerische Berechnung eines schweißtypischen transienten Temperaturfelds angewandt. Die Rechenzeit und Skalierbarkeit des Computerprogramms bezüglich der Anzahl verwendeter CPU Kerne wurde untersucht und mit dem kommerziellen FEM Programm Abaqus 6.14 verglichen. Die Anwendung der expliziten Zeitintegration resultiert in verbesserter Skalierbarkeit bezüglich der Anzahl verwendeter CPU Kerne und Rechenzeitersparnis gegenüber der in Abaqus implementierten impliziten Zeitintegrationsmethode.
Numerical sensitivity analysis of TRIP-parameter K on weld residual stresses for steel S355J2+ N
(2016)
A combined experimental numerical approach is applied for sensitivity analysis of the transformation induced plasticity (TRIP)-parameter K on weld residual stresses for welding of structural steel of grade S355J2+N. K was determined experimentally using the Gleeble 3500 facility. A thermomechanical FE model of the real welding process was experimentally validated against temperature field and X-ray stress measurements. Within sensitivity analyses K was varied by several orders of magnitude and the influence on the calculated residual stresses is evaluated by performing corresponding FEA. The correct order of magnitude is sufficient to reproduce the residual stresses qualitatively and quantitatively.
Selecting a welding process for a given application is crucial with respect to the sustainability of part manufacturing. Unfortunately, since welding processes are evaluated by a number of criteria, preferences for one or the other process can be contradictory. However, the prevalent procedure of weight assignment for each criterion is subjective and does not provide information about the entire solution space. From the perspective of a decision maker it is important to be able to assess the entire set of possible weightings and answer the question which welding process is optimal for which set of weights. This issue is investigated by means of a weight space partitioning approach. Two welding processes are considered with respect to three criteria that reflect their economic and environmental performance. In order to find the most sustainable welding process the underlying weight space partition is evaluated.
Increasing performance and energy efficiency of Gas Metal Arc Welding by a high power tandem process
(2016)
Standard Gas Metal Arc Welding (Standard GMAW) and a high power Tandem GMAW (TGMAW) process are evaluated with respect to energy efficiency. Current, voltage and overall equipment power are measured and energy consumption is determined. The new key performance indicator Electrical Deposition Efficiency is introduced to reflect the energy efficiency of GMAW processes. Additionally, wallplug efficiency of the equipment is determined in order to identify the overall energy consumption. Results show that energy efficiency as well as economic process performance can be significantly increased by application of the TGMAW process. Furthermore findings indicate that wall-plug efficiency of the equipment is independent of power level and material transfer mode. A metal plate of 30 mm thick structural steel is joined by Standard GMAW and TGMAW to demonstrate the total energy savings for a real weld. Electricity consumption is reduced by more than 20 % using the high power TGMAW process.
Life Cycle Assessment (LCA) is applied in evaluating environmental impacts of state-of-the-art welding technologies. Manual Metal Arc Welding (MMAW), Laser Arc-Hybrid Welding (LAHW) and two Gas Metal Arc Welding (GMAW) variants are used to join a plate of 20 mm thick structural steel. The LCA results indicate that for 1 m weld seam, MMAW causes the highest environmental impacts in global warming potential (GWP), eutrophication potential (EP), acidification potential (AP), and photochemical ozone creation potential (POCP) among the selected processes, and the LAHW variant performances the least. Filler material and electricity consumptions generally dominate the impacts and reach shares of up to 80% and 61% in the respective impact categories. However, electrode coating consumption in MMAW remarkably contributes impacts on AP and EP, for instance 52% of AP and 76% of EP. Strategies for improvement of the applied welding technologies are discussed.