Lb. Yuan et Lm. Zhou, SENSITIVITY COEFFICIENT EVALUATION OF AN EMBEDDED FIBEROPTIC STRAIN SENSOR, Sensors and actuators. A, Physical, 69(1), 1998, pp. 5-11
A simple model is developed for evaluating the interaction between the
surrounding matrix and a length of optical fiber embedded in it. The
analysis has been performed for nominal uniform pull-stress applied to
the matrix, in which a sensitivity coefficient K(L) is used to descri
be the percentage of strain applied to the composite actually transfer
red to the fiber. The theoretical results have shown that the sensitiv
ity coefficient of the fiber-optic strain sensor depends on the embedd
ed length of the optical fiber and the material properties of the fibe
r coating. The general trend of increasing the sensitivity coefficient
with increasing action length has been confirmed by the experimental
results. The distributions of interfacial shearing stress between matr
ix and coating and coating and glass fiber are given. Experiments have
been performed using a white-light fiber-optic interferometer. (C) 19
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