All of us grew up with metal parts that flex politely when they are stressed, and then bend back into perfect shape when the stress is relieved.
Carbon is a whole different animal. Look at the wreck of the Titan submersible diving the Titanic wreck side. Cumulative stress on the carbon fiber hull from multiple prior dives snapped individual fibers a few at a time until the entire hull imploded catastrophically at depth.
The damage was microscopic. I don't know any way to check how much strength is left in a carbon fiber part. One thing you can do to keep carbon fiber parts in good shape is to properly torque your bolts.