Fatigue Crack Monitoring under High-cycle Fatigue Loading Using Large-area Soft Elastomeric Capacitive Sensor

dc.contributor.author Li, Jian
dc.contributor.author Laflamme, Simon
dc.contributor.author Kong, Xiangxiong
dc.contributor.author Collins, William
dc.contributor.author Bennett, Caroline
dc.contributor.author Laflamme, Simon
dc.date 2018-02-17T23:55:40.000
dc.date.accessioned 2020-06-30T06:54:12Z
dc.date.available 2020-06-30T06:54:12Z
dc.date.issued 2016-01-01
dc.description.abstract <p>Fatigue cracks under high-cycle fatigue loading due to normal traffic are one of the major damage modes of steel bridges. Monitoring these cracks is of great importance especially for fracture-critical bridges in order to ensure safe operation by preventing catastrophic failure due to excessive damage. A newly developed soft elastomeric capacitive (SEC) sensor [1] is able to monitor strain changes over a large area of structural surface and resist large deformation due to cracking without being damaged. To examine the feasibility of monitoring fatigue cracks under high-cycle fatigue loading using the SEC sensor, a compact tension specimen is tested under cyclic tension loads with varying load ranges (Fig. 1), which are designed to ensure realistic stress level, hence the size of crack opening, one would see in real bridges. The measured capacitance time history from the SEC sensor is converted into power spectral densities (PSD), such that the amplitude of the signal can be extracted at the dominant loading frequency. A crack damage indicator is proposed as the ratio between the amplitude of PSD and load range. Results show that the crack damage indicator offers consistent indication of crack growth (Fig. 2). A network of SEC sensors will be designed accordingly to monitor crack propagation in steel bridges based on the proposed crack damage indicator.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/2016/abstracts/32/
dc.identifier.articleid 5121
dc.identifier.contextkey 9295465
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/2016/abstracts/32
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/62083
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/2016/abstracts/32/335_Fatigue_Crack.pdf|||Fri Jan 14 23:34:07 UTC 2022
dc.subject.disciplines Electro-Mechanical Systems
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Mechanics of Materials
dc.title Fatigue Crack Monitoring under High-cycle Fatigue Loading Using Large-area Soft Elastomeric Capacitive Sensor
dc.type event
dc.type.genre event
dspace.entity.type Publication
relation.isAuthorOfPublication 84547f08-8710-4934-b91e-ba5f46ab9abe
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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