Life Expectancy of Aerial Fiber Optic Cable

I don't know of any, but sharing why you are interested in knowing this may give more directed answers.

It depends on the type of cable (OPGW, ADSS, etc.). Although several IEEE Transactions papers have been published, the best source of information is probably the manufacturers. Phillips-Fitel is a major manufacturer of several types ). I also recall a presentation by Sangib Dutta from that company during a recent IEEE TP&C conference. Another major manufacturer is AFLtelecommunications (afltele.com).

Design test reports, including life test data, are usually available either directly from the manufacturers' website or they can be requested.