Joining materials using glue, spreading stress evenly across the joint.

• A. Soldering
• B. Welding
• C. Risk assessment
• D. Adhesive bonding

Answer: (D)

The method being tested distributes load across a wide interface rather than at a single point. Adhesive bonding creates a continuous bond over the entire joint area, so stresses from a load are spread out across the whole adhesive layer. This helps reduce sharp stress concentrations at the joint edges and can improve fatigue resistance, especially when joining different materials or surfaces with irregularities. It also allows some tolerance for slight misalignment and can seal and dampen vibrations.

In contrast, soldering and welding fuse materials by melting filler metal at a joint, which concentrates stress along the weld or solder line and can create heat-affected zones. This often leads to localized weaknesses under load. Risk assessment isn’t a joining method at all, so it doesn’t address how to join materials.

So, adhesive bonding is the approach that best spreads stress evenly across the joint.