Specialty Optical Fibers Handbook

There are two techniques for measuring dynamic fatigue: tension and two-point

bending. In the tensile test, a fiber is gripped at each end and pulled in tension until

it breaks. In the two-point bending test, fibers are bent between two faceplates that

move toward each other at a controlled rate until the fibers break [29–32].

Gulati [33] published one of the earliest papers that discussed test methods for

measuring the tensile and bending strengths of optical fibers. He also calculated

the required proof stress level to ensure fiber durability of at least 20 years when

subjected to a known value of service stress.

Michalske and Bunker [34–38] published a number of studies on the fracture

mechanics of glass and glass fibers. Helfinstine [39] published ...