Project Details
Projekt
SFB 675: Creation of High Strength Metallic Structures and Joints by Setting up Scaled Local Material Properties
Subject Area
Mechanical and Industrial Engineering
Computer Science, Systems and Electrical Engineering
Materials Science and Engineering
Computer Science, Systems and Electrical Engineering
Materials Science and Engineering
Term
from 2006 to 2011
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 13227965
Metallic structures are widely used in mechanical engineering, manufacturing of chemical equipment, as well as in traffic engineering. They are subjected to very different application-specific loading profiles, which become increasingly complex. The demands of the material properties are increased since strains, which appear, are locally limited and inhomogeneous. Due to this development, an increasing number of high strength structures with a high degree of specialisation are needed.
With the current state of technology, the selection of materials is still based on the highest expected strain, even if this appears only in locally restricted areas. Therefore, the Collaborative Research Centre sets the ambitious aim to optimise material properties that will be able to resist high locally applied loads. Consequently, the fields of application of the available construction materials will be expanded and new application possibilities will be created. In order to use these materials for product developments in future, suitable technological descriptions and characterisation signs are needed. Material properties, which will be used for characterisation of dimension, are: strength of material, stiffness, wear resistance, thermal stability, chemical resistance, etc. By local adaptation of material properties, the conflicting demands concerning the design of structural elements, e.g. which appear in rods, knots or sheet elements, will be overcome. In this way, structural parts will be realisable which exhibit high local strength and hardness, however, in neighbouring areas, they do exhibit good ductility and only reduced strength in case of need.
Local optimisation of material properties will consequently have a pronounced influence on the design and manufacturing process of the components. The purpose of the Collaborative Research Centre is the complete investigation of the developing and manufacturing processes of high strength structures with locally engineered properties. This will include both basic research as well as development of new technologies and design of manufacturing processes. Furthermore, because of high manufacturing demands and high loading capacity of these components, questions of quality assurance as well as predictability of the components life-time have to be considered.
With the current state of technology, the selection of materials is still based on the highest expected strain, even if this appears only in locally restricted areas. Therefore, the Collaborative Research Centre sets the ambitious aim to optimise material properties that will be able to resist high locally applied loads. Consequently, the fields of application of the available construction materials will be expanded and new application possibilities will be created. In order to use these materials for product developments in future, suitable technological descriptions and characterisation signs are needed. Material properties, which will be used for characterisation of dimension, are: strength of material, stiffness, wear resistance, thermal stability, chemical resistance, etc. By local adaptation of material properties, the conflicting demands concerning the design of structural elements, e.g. which appear in rods, knots or sheet elements, will be overcome. In this way, structural parts will be realisable which exhibit high local strength and hardness, however, in neighbouring areas, they do exhibit good ductility and only reduced strength in case of need.
Local optimisation of material properties will consequently have a pronounced influence on the design and manufacturing process of the components. The purpose of the Collaborative Research Centre is the complete investigation of the developing and manufacturing processes of high strength structures with locally engineered properties. This will include both basic research as well as development of new technologies and design of manufacturing processes. Furthermore, because of high manufacturing demands and high loading capacity of these components, questions of quality assurance as well as predictability of the components life-time have to be considered.
DFG Programme
Collaborative Research Centres
Completed projects
- A01 - Local strain hardening of sheet metal components by martensite generation (Project Heads Behrens, Bernd-Arno ; Hübner, Sven )
- A02 - Use of ageing effect to change the locally properties of multiphase steels (Project Head Palkowski, Heinz )
- A03 - Production of customized high-strength hybrid sandwich Structures (Project Head Palkowski, Heinz )
- A04 - Foam-filled, roll-formed closed profiles (Project Heads Bach, Friedrich-Wilhelm ; Bormann, Dirk )
- B01 - Local Effects of Welding Seams with Laser-Based Joining Concepts for High-Strength Load-Transferring Structure Modules (Project Heads Kracht, Dietmar ; Wesling, Volker )
- B02 - Production of complex local strain hardened bulk metal components by means of superimposed hydrostatic pressure (Project Head Behrens, Bernd-Arno )
- B03 - Development of combined machining technologies for high strength structural components (Project Heads Breidenstein, Bernd ; Denkena, Berend )
- B05 - Material aligned process control for the welding technology of locally hardened materials to produce nodes and structures (Project Head Wesling, Volker )
- C01 - Three-Dimensional Optical Measurement with Locally Adapted Projection (Project Head Denkena, Berend )
- C02 - Fatigue Life Calculation Concepts for Structures with Inhomogeneous Strength Properties (Project Head Esderts, Alfons )
- C03 - Low Heat Joining - Manufacture and Fatigue of Soldered Locally Strengthened Structures (Project Heads Esderts, Alfons ; Masendorf, Rainer ; Schram, Antonia ; Wesling, Volker )
- C04 - Setting of gradient material properties and quality control of high tension 3D NVEBweld joints (Project Heads Bach, Friedrich-Wilhelm ; Reimche, Wilfried )
- C07 - Development of high tensile structures with variety of property by means of the finite element design (FED) (Project Heads Lohrengel, Armin ; Schram, Antonia ; Schäfer, Günter )
- T01 - Umformtechnische Strukturierung von Blechbauteilen zur lokalen Verstärkung (Project Heads Behrens, Bernd-Arno ; Hübner, Sven )
- Z - Coordination of the Collaborative Research Centre (Project Head Palkowski, Heinz )
Applicant Institution
Technische Universität Clausthal
Participating Institution
Laser Zentrum Hannover e.V. (LZH)
Participating University
Gottfried Wilhelm Leibniz Universität Hannover
Spokesperson
Professor Dr.-Ing. Heinz Palkowski
