Disaster-Resilient and Self-Assessing Multifunctional Transportation Structures

This research designs and characterizes multifunctional materials, in particular inexpensive shape memory alloys, for transportation structures that possess excellent mechanical properties and self-sensing capabilities for strengthening and health monitoring. The properties are the iron-based shape memory alloys (Fe-SMAs) are sensitive to part size in that the grain size of the material, which can be grown to several inches, should exceed the smallest dimension of the part. In the current work, maximum part size of the large dimension Fe-SMA rods were determined through detailed microstructural investigations. Samples were subjected to abnormal grain growth heat treatments and found out that part size be increased up to 4.6 mm. Work to correlate computational and experimental work concerning the magnetic sensing of Fe-SMA transformation was conducted using via tensile loading of Fe-SMA wire. A model was developed to simulate a grain by grain transformation of a wire with large (4mm) grains along the wire, modeled as partitioned segments.

• Record URL:
  • https://digitalcommons.lsu.edu/transet_pubs/53/
• Dataset URL:
  • https://digitalcommons.lsu.edu/transet_data/52/
• Dataset URL:
  • https://rosap.ntl.bts.gov/view/dot/65539
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/62546
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program. Supporting datasets available at: https://digitalcommons.lsu.edu/transet_data/52/; https://rosap.ntl.bts.gov/view/dot/65539
• Corporate Authors:

  Texas A&M University

  ,    

  Transportation Consortium of South-Central States (Tran-SET)

  Louisiana State University
  Baton Rouge, LA  United States  70803

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Authors:
  • Karaman, Ibrahim
  • 0000-0001-6461-4958
  • Hartl, Darren
  • 0000-0001-9922-0481
• Publication Date: 2019-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References;
• Pagination: 41p

Subject/Index Terms

• TRT Terms: Alloys; Disaster resilience; Magnetic properties; Microstructure; Rods; Structural health monitoring; Tension; Wire
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 01719646
• Record Type: Publication
• Report/Paper Numbers: 18STTAM02
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Oct 22 2019 2:34PM