Abstract

We evaluate the effect of the nonlinear stress-strain relationship on the maximum curvature and maximum stress in silica fibers subjected to two-point bending. The analysis uses an assumption that this relationship, obtained experimentally for the case of uniaxial tension is also valid in the case of compression and is applicable to bending deformations as well. We show that the shift in the neutral axis due to the nonlinear stress-strain relationship has an appreciable effect on the maximum stress, while its effect on the maximum curvature is small and need not be considered. We show also that this relationship, obtained for strains not exceeding 5% cannot be applied for very large strains. Therefore we conclude that the future experimental work should include the evaluation of the nonlinear behavior of the material, both in tension and compression, for higher strains and for high strength fibers. The obtained results can be helpful in the analysis of optical silica fibers experiencing two-point bending.

© 1993 Optical Society of America

Elastic stability, free vibrations, and bending of optical glass fibers: effect of the nonlinear stress–strain relationship

E. Suhir
Appl. Opt. 31(24) 5080-5085 (1992)

Predicted stresses and strains in fused biconical taper couplers subjected to tension

E. Suhir
Appl. Opt. 32(18) 3237-3240 (1993)

Analytical modeling of the interfacial shearing stress in dual-coated optical fiber specimens subjected to tension

E. Suhir
Appl. Opt. 32(16) 3024-3034 (1993)

Theory and measurement of Young’s modulus radial profiles of bent single-mode optical fibers with the multiple-beam interference technique

Fouad El-Diasty
J. Opt. Soc. Am. A 18(5) 1171-1175 (2001)

Stress homogenization effect in multicore fiber optic bending sensors

G. Capilla-Gonzalez, D. A. May-Arrioja, D. Lopez-Cortes, and J. R. Guzman-Sepulveda
Appl. Opt. 56(8) 2273-2279 (2017)