Elasto-plastic bond mechanics of embedded fiber optic sensors in concrete under uniaxial tension with strain localization

Li, Qingbin; Li, Guang; Guanglun, Wang

doi:10.1088/0964-1726/12/6/001

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…According to the literature, many stress transfer models have been established to describe the interaction between the embedded optical fiber and the surrounding medium, together with a few numerical analyses studies (e.g. [24][25][26][27][28][29][30][31][32][33]). However, these interface models cannot take into account the effects of confining pressure, which is a crucial factor for soil inclusions [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on pullout performance of sensing optical fibers in compacted sand

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Experimental study on pullout performance of sensing optical fibers in compacted sand

et al. 2015

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“…A similar approach was reported by Li et al [20] in their model tests. On the other hand, much research has been carried out to characterize the interfacial behavior between OFSs and manmade materials, or the strain transfer efficiency from host materials to fiber cores [21]- [26]. On theoretical grounds, a few interaction theories have been proposed [27]- [31], but these models can hardly be extended to interpret the fiber/soil interaction as they do not explicitly account for normal pressure.…”

mentioning

confidence: 99%

Quantitative Evaluation of Optical Fiber/Soil Interfacial Behavior and Its Implications for Sensing Fiber Selection

et al. 2015

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An adequate understanding of the interface between optical fibers and geomaterials is a prerequisite for applying distributed optical fiber sensor systems to strain monitoring in geoengineering. This contribution reports a quantitative investigation of the fiber/soil interfacial behavior regarding the influence of fiber types and normal pressures. A simplified model describing the progressive failure of a fiber/soil interface was briefly illustrated. Results of a series of pullout tests on three different soil-embedded optical fibers under various normal pressures were interpreted by this model, through which the fiber/soil interfacial behaviors were quantified. The results showed that the mechanical properties of the three fiber/soil interfaces were similar. Optical microscopic images indicated that the soil particles and the fibers were merely loosely contacted. This led to the formation of a fiber/soil interface susceptible to the normal pressure: 1) the interfacial bond was tightened and 2) the deformation measurement range was widened under high normal pressures. Moreover, the criterion for selecting a strain sensing fiber for geoengineering applications was discussed in terms of interfacial bond, deformation measurement range, ratio of peak to residual interfacial shear strength, Young's modulus of fiber, and so forth. An assessment of the three fibers reveals that, for ground deformation measurement, each fiber has its own advantages as well as limitations. In field or laboratory applications, a combination of different types of fibers may obtain the best measurement results.

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“…In [9], the concept of thermal stability in optical fibers was clarified, and in [10], the coating thermal stability and mechanical strength at elevated temperatures of optical fibers were evaluated on different samples. The physical properties of the coating were also evaluated in [11], where the elasto-plastic bond mechanics of the fiber coating were evaluated, while in [12], a fatigue test was carried out assessing the performance stability of DOFS over two million load cycles.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Optical Fiber Strain Sensing Cables under γ-Ray Irradiation and Large Strain Influence

Piccolo

Delépine-Lesoille

Friedrich³

et al. 2020

Sensors

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Optical fiber strain sensing cables are widely used in structural health monitoring; however, the impact of a harsh environment on them is not assessed despite the huge importance of the stable performances of the monitoring systems. This paper analyzes (i) the impact of the different constituent layers on the behavior of a strain sensing cable whose constitutive materials are metal and polyamide, (ii) the radiation influence on the optical fiber strain sensing cable response (500 kGy of γ -rays), and (iii) the behavior of the cable under high axial strain (up to 1%, 10,000 μ ε ). Radiation impact on strain sensitivity is negligible for practical application, i.e., the coefficient changes by 4% at the max. The influence of the composition of the cable is also assessed: the sensitivity differences remain under 15%, a standard variation range when different cable compositions and structures are considered. The elasto-plastic behavior is at the end evaluated, highlighting the residual strain (about 1600 μ ε after imposing 10,000 μ ε ) of the cable (especially for metallic parts).

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Elasto-plastic bond mechanics of embedded fiber optic sensors in concrete under uniaxial tension with strain localization

Cited by 9 publications

References 12 publications

Experimental study on pullout performance of sensing optical fibers in compacted sand

Experimental study on pullout performance of sensing optical fibers in compacted sand

Quantitative Evaluation of Optical Fiber/Soil Interfacial Behavior and Its Implications for Sensing Fiber Selection

Mechanical Properties of Optical Fiber Strain Sensing Cables under γ-Ray Irradiation and Large Strain Influence

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