Composite Materials Practice Test

What is the purpose of adhesives in composites?

To hold objects or materials together To provide electrical conduction To increase the laminate weight To dissolve the resin

Correct Answer:

To hold objects or materials together

Explanation:

Adhesives in composites act as the bonding medium that holds layers and components together so the structure behaves as a single unit. By gluing the plies or parts, the adhesive transfers loads between layers, helps resist delamination, and allows joining different materials without fasteners that can create weak points. The adhesive must be compatible with the materials and environment to maintain strength and stiffness, distributing shear and peel stresses across the joint during bending, impact, and temperature changes. This bonding function is why the primary purpose is to hold materials together. It isn’t primarily about conducting electricity, increasing weight, or dissolving resin.

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