Which statement describes a reason composites do not fail catastrophically when some fibers fail?

• A. When fibers fail, the matrix takes the load
• B. The composite always fails catastrophically if any fiber fails
• C. All fibers fail at the same time
• D. The matrix cannot bear any load after fiber failure

Answer: (A)

In composites, load is shared between the strong fibers and the surrounding ductile matrix. When some fibers fail, the load they were carrying is redistributed to neighboring intact fibers and to the matrix, which can take on additional load and transfer stress to remaining fibers. This redistribution prevents an immediate global collapse, giving the material a chance to carry load and continue to perform rather than fail catastrophically. That’s why the statement that the matrix takes the load after fiber failure best describes the reason composites don’t fail all at once. The other ideas imply instantaneous, all-at-once failure, or that the matrix has no load-bearing role, which isn’t how typical fiber-reinforced composites behave.