Structural Bonding
What is Structural Bonding?
Structural bonding is a load-bearing adhesive connection that transfers mechanical loads between parts and is used as an equivalent replacement for conventional joining techniques such as welding, soldering, or screwing. These connections are an integral part of the load-bearing structure.
Properties of Structural Bonds
- High mechanical strength under static and dynamic loads
- Uniform stress distribution over the entire bonding surface
- Rigid or flexible connections depending on requirements
- Long-term aging resistance under operating conditions
- Bonding of different materials possible
- Weight reduction compared to mechanical connections
Adhesive Systems for Structural Bonding
- Epoxy resins: Highest strengths and temperature resistance
- Polyurethanes: Flexible structural connections
- High Temperature Adhesives: For thermally stressed structures
- Acrylates: Fast curing with high strengths
Applications
- Automotive: Body bonding and lightweight construction
- Aerospace: Structural connections in aircraft fuselages
- Mechanical engineering: Load-bearing connections in systems
- PEEK Bonding: High-performance plastics in structural applications
Design Criteria
- Shear strength: Main load type in structural bonding
- Peel strength: Resistance to detachment at bond line ends
- Bond line geometry: Optimal load introduction
- Dynamic strength: Fatigue strength under alternating loads
Processing Requirements
- Pot life: Sufficient time for positioning
- Open time: Controlled time window for adjustment
- Dual cartridges: Precise mixing of 2K systems
- Dispensing valves: Automated application in series
Quality Assurance
- Destructive testing: Tensile shear tests and peel tests
- Non-destructive testing: Ultrasound and thermography
- Aging tests: Climate change and corrosion tests
- Statistical process control for reproducible quality
Advantages Over Conventional Connections
- No weakening of base material through drilling
- Uniform force distribution without stress peaks
- Sealing of connection against corrosion
- Bonding of different materials possible
DELO Adhesive Solutions
- High-strength structural adhesives for various materials
- Automotive-qualified systems according to OEM standards
- Comprehensive design consulting for structural applications
Looking for adhesives for structural bonding?
