Aviation Structural Mechanic Second Class (AM2) Advancement Practice Exam

Delamination in composite materials occurs when there is a separation of layers within the material, which compromises its structural integrity. This phenomenon is most commonly caused by moisture infiltration or mechanical impact.

Moisture infiltration can lead to the weakening of the bonds between the layers of composite materials. When water penetrates the composite, it can act as a catalyst for chemical reactions that degrade the adhesive bonds or the resin itself. Additionally, mechanical impacts can impose stresses that exceed the adhesive strength of the layers in the composite, leading to separation.

While the other factors listed can influence composite materials, they do not typically lead to delamination in the same immediate way as moisture infiltration or mechanical impact. High temperatures during manufacturing may affect the curing process but are not a direct cause of delamination. Incorrect resin curing can lead to a variety of manufacturing issues, but moisture and impacts remain the primary causes for delamination. Excessive weight on the material can lead to deformation or failure in structural applications, but delamination specifically refers to the separation of layers rather than overall material failure due to excessive load.

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