Designing and Validating Parallel Wire Suspension Bridge Wire Strands for Neutron Diffraction Stress Mapping
| Autor: | Seung-Yub Lee, Adrian Brügger, Raimondo Betti, Ismail C. Noyan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Neutron diffraction 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Condensed Matter Physics Bridge (interpersonal) 020303 mechanical engineering & transports 0203 mechanical engineering Stress mapping Mechanics of Materials General Materials Science 0210 nano-technology Suspension (vehicle) business |
| Zdroj: | Materials Science Forum. 905:123-130 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.905.123 |
| Popis: | Suspension-bridge cables are constructed from strands of galvanized steel wire. They are failure-critical structural members, so a fundamental understanding of their mechanics is imminently important in quantifying suspension bridge safety. The load-carrying capabilities of such strands after local wire failures have been the subject of many theoretical studies utilizing analytical equations and finite-element analysis. Little experimental data, however, exists to validate these models.Over the past five years we have developed a methodology for measuring stress/strain transfer within parallel wire strands of suspension bridge cables using neutron diffraction [1,2]. In this paper we describe the design and verification of parallel cable strands used in our studies. We describe the neutron diffraction strain measurements performed on standard 7-wire and expanded 19-wire models in various configurations at both the Los Alamos National Laboratory Spectrometer for Materials Research at Temperature and Stress (LANL SMARTS) and at the Oak Ridge National Laboratory VULCAN Engineering Materials Diffractometer (ORNL VULCAN). Particular attention is placed on the challenges of aligning and measuring multibody systems with high strain gradients at body-to-body contact points. |
| Databáze: | OpenAIRE |
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