Torsion mechanical parameters of optical fibers

Gilberto M. Camilo

doi:10.1117/12.424371

16 April 2001 Torsion mechanical parameters of optical fibers

Gilberto M. Camilo

Proceedings Volume 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing; (2001) https://doi.org/10.1117/12.424371
Event: Information Technologies 2000, 2000, Boston, MA, United States

Abstract

The strength measurements of optical fibers is performed usually in tensile and in two-point bending. In tensile the weak flaw that will fracture the fiber has its effective length perpendicular to the length of the fiber. In two-point bending the maximum stress in the fiber will fracture the worst flaw which effective length is perpendicular to the length of the fiber. But the optical fiber manufacture process occurs in the length line and most defects originated during the process is aligned in length, and is not fully tested using two-point bending or tensile. Another important practical aspect not investigated is related with the low torsion stress present during long time in installed cables, that can cause fracture by fatigue. In torsion the maximum tensile stress is on planes forty-five degrees oriented with respect to the length of the fiber and it can better detect those defects. In this study dynamic fatigue torsion tests were performed and compared with other mechanical tests. The results show a good agreement between fracture distributions for fibers under torsion and under two-point bending.

Citation Download Citation

Gilberto M. Camilo "Torsion mechanical parameters of optical fibers", Proc. SPIE 4215, Optical Fiber and Fiber Component Mechanical Reliability and Testing, (16 April 2001); https://doi.org/10.1117/12.424371

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