Soft structural textiles,or softgoods,are used within the space industry for inflatable habitats,parachutes and decelerator systems.Evaluating the safety and structural integrity of these systems occurs through struct...Soft structural textiles,or softgoods,are used within the space industry for inflatable habitats,parachutes and decelerator systems.Evaluating the safety and structural integrity of these systems occurs through structural health monitoring systems(SHM),which integrate non-invasive/non-destructive testing methods to detect,diagnose,and locate damage.Strain/load monitoring of these systems is limited while utilizing traditional strain gauges as these gauges are typically stiff,operate at low temperatures,and fail when subjected to high strain that is a result of high loading classifying them as unsuitable for SHM of soft structural textiles.For this work,a capacitance based strain gauge(CSG)was fabricated via aerosol jet printing(AJP)using silver nanoparticle ink on a flexible polymer substrate.Printed strain gauges were then compared to a commercially available high elongation resistance-based strain gauge(HE-RSG)for their ability to monitor strained Kevlar straps having a 26.7 kN(6 klbf)load.Dynamic,static and cyclic loads were used to characterize both types of strain monitoring devices.Printed CSGs demonstrated superior performance for high elongation strain measurements when compared to commonly used HE-RSGs,and were observed to operate with a gauge factor of 5.2 when the electrode arrangement was perpendicular to the direction of strain.展开更多
基金This material is based upon work supported under an Integrated University Program Graduate Fellowship,and was supported in part by Department of Energy In-Pile Instrumentation program under DOE Idaho Operations Office Contract DE-AC07-05ID14517 and by the National Aeronautics Space Administration under award#80NSSC18M0088The views and opinions of authors expressed herein do not necessarily state or reflect those of the U.S.Government or any agency thereof.D.E.also acknowledges career development support by Institutional Development Awards(IDeA)from the National Institute of General Medical Sciences of the National Institutes of Health under Grants#P20GM103408 and P20GM109095.
文摘Soft structural textiles,or softgoods,are used within the space industry for inflatable habitats,parachutes and decelerator systems.Evaluating the safety and structural integrity of these systems occurs through structural health monitoring systems(SHM),which integrate non-invasive/non-destructive testing methods to detect,diagnose,and locate damage.Strain/load monitoring of these systems is limited while utilizing traditional strain gauges as these gauges are typically stiff,operate at low temperatures,and fail when subjected to high strain that is a result of high loading classifying them as unsuitable for SHM of soft structural textiles.For this work,a capacitance based strain gauge(CSG)was fabricated via aerosol jet printing(AJP)using silver nanoparticle ink on a flexible polymer substrate.Printed strain gauges were then compared to a commercially available high elongation resistance-based strain gauge(HE-RSG)for their ability to monitor strained Kevlar straps having a 26.7 kN(6 klbf)load.Dynamic,static and cyclic loads were used to characterize both types of strain monitoring devices.Printed CSGs demonstrated superior performance for high elongation strain measurements when compared to commonly used HE-RSGs,and were observed to operate with a gauge factor of 5.2 when the electrode arrangement was perpendicular to the direction of strain.
