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Optimization Design and Analysis of Irregular Cross-Sectional Structure in Water Conducting Fibers
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Optimization Design and Analysis of Irregular Cross-Sectional Structure in Water Conducting Fibers
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Journal Article
Optimization Design and Analysis of Irregular Cross-Sectional Structure in Water Conducting Fibers
2024
Overview
Active moisture control of wicking geotextiles is an effective way to prevent roadbed frost heave diseases. The performance of water conducting fibers determines the drainage function of the wicking geotextile. This study proposes a design method of the cross-sectional structure that synergistically consider drainage and mechanical properties in fibers. The circular or elliptical fiber profile and semicircular groove shape are first determined based on the maximization of the fiber cross-sectional specific surface area. Then, numerical simulation orthogonal experiments are conducted using COMSOL Multiphysics software to investigate the water conductivity and uniaxial tension of irregular fibers. The CRITIC weighted indicator of water conductivity to fiber volume ratio, tensile stress peak and fracture elongation is used as the analysis objects. The influence weights of fiber contour morphology, fiber size, groove number and groove area ratio on the weighted indicators are analyzed, and their optimal values are determined. The optimal “M”-shaped fiber is obtained, and the effectiveness of optimization design is verified through scanning electron microscopy and uniaxial tensile test. The “M”-shaped fiber is woven into the wicking geotextile, and geotextiles water conversion corporation test and drainage test of silty clay soil column is carried out. The test find that mass moisture content of the soil sample decreased by 4.73% within 8 days, which is 2.24% more than that of the staple fibers needling geotextile. This proves the effectiveness of “M”-shaped fibers and wicking geotextiles woven into them.
Publisher
Springer Nature B.V
Subject
/ Clay
/ Design
/ Drainage
/ Fibers
/ Grooves
/ Scanning electron microscopy
/ Shape
/ Structure-function relationships
/ Water
