Suhir E
Appl Opt. 1992 Aug 20;31(24):5080-5. doi: 10.1364/AO.31.005080.
We evaluate the effect of the nonlinear stress-strain relationship on elastic stability, free vibrations, and bending of optical glass fibers. The analysis is carried out under an assumption that this relationship, obtained for the case of uniaxial tension is also valid in the case of compression, and is applicable to bending deformations as well. We examine low-temperature microbending of infinitely long dual-coated fibers, elastic stability of short bare fibers, free vibrations of long fused portions of light-wave couplers that are subjected to uniaxial tension, and bending deformations of optical fibers that experience large deflections. We conclude that the nonlinear stress-strain relationship in silica materials can have a significant effect on the mechanical behavior of optical fibers and that, since the experimental data were obtained for tensile strains not exceeding 5%, future experimental research should include evaluation of the nonlinear stress-strain relationship, both in tension and compression, for higher strains and for high-strength fibers (such as, for instance, fibers protected by metallic coatings).
我们评估了非线性应力-应变关系对光学玻璃纤维的弹性稳定性、自由振动和弯曲的影响。分析是在这样一个假设下进行的：对于单轴拉伸情况得到的这种关系在压缩情况下同样有效，并且也适用于弯曲变形。我们研究了无限长双涂层光纤的低温微弯曲、短裸光纤的弹性稳定性、承受单轴拉伸的光波耦合器长熔接部分的自由振动以及经历大挠度的光纤的弯曲变形。我们得出结论，二氧化硅材料中的非线性应力-应变关系会对光纤的力学行为产生显著影响，而且由于实验数据是在拉伸应变不超过5%的情况下获得的，未来的实验研究应包括评估在更高应变下以及对于高强度光纤（例如金属涂层保护的光纤）在拉伸和压缩时的非线性应力-应变关系。
