Key aspects

Scientific Society for Joining Technology e.V. in DVS
- Member status
- Key aspects

Key aspects

Lifetime

Windkraftpark

high fatigue stress in infrastructure structures (e.g. bridges, wind turbines, etc.)
critical details are often welding seams
Loss of strength due to exposure to heat

Goals

Increase in operating loads
Extension of the service life
Reduction of the construction weight
Reduction of the transport weights

Problems

Brücke

deterioration of properties due to heat influence no suitable filler materials available (missing quenching sensitivity, insufficient strength)
Increase of notch sensitivity
Increased residual stress effect

Follow

lack of regulatory acceptance
insufficient utilization of material resources
lack of knowledge of residual stress generation and effects

Development and validation of new joining techniques for hybrid structures

Erarbeitung und Absicherung neuer Fügetechniken für hybride Strukturen

Hybrid joining

Development and validation of new joining techniques for hybrid structures

Production of purely glued structures

Technology assurance
Interpretation
Optimized manufacturing processes

New hybrid processes

Process optimization
Auslegungsmethodik

Allaminatepackage

Internal and external contacting of energy sources

Joining of dissimilar materials
Electrodes of AL and Cu

problem:

thermal loads of maximum 80°C are permitted in the edge area of the joining zone
Transition resistances through oxide layers
Limited installation space, possibly detachable connection
Research into surface treatments and alternative joining processes