Fatigue Crack Control in Waterway Lock Gate Pintle Locations Subjected to Multi-Modal Fracture

The proposed research project will address multi-mode fatigue cracking within critical lock gate pintle locations. The lock gate pintle is a ball-and-socket joint that is crucial for proper gate operation, but is subject to frequent fatigue cracking. Fatigue crack repair within pintle locations is particularly challenging due to the complex multi-axial loading conditions (combined axial and torsional loads) that occur during gate opening and closing. The project proposed herein will analytically investigate multi-axial stress demands within common pintle geometries during operation, and develop bonded fiber reinforced polymer (FRP) retrofits capable of controlling multi-mode fractures (fractures that originate from both tensile and shear stresses). The project contains two integrated research components: 1) a detailed analytical crack investigation to develop FRP retrofit strategies; and 2) a multi-axial experimental fatigue investigation exploring FRP retrofit effects on multi-mode fatigue fractures. Outcomes of the proposed project include an implementable pintle fatigue retrofit strategy for US Army Corps of Engineers stakeholders, ultimately improving waterway infrastructure reliability. Additionally, novel multi-mode fatigue data for composite materials will be generated and advanced research training will be provided for an engineering graduate student (providing knowledge transfer to industry upon completion).

    Project

    • Status: Active
    • Funding: $176347
    • Contract Numbers:

      69A3551747130

    • Sponsor Organizations:

      Department of Transportation

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590
    • Managing Organizations:

      Maritime Transportation Research and Education Center

      4190 Bell Engineering Center
      Fayetteville, Arkansas  United States 
    • Performing Organizations:

      University of Arkansas, Fayetteville

      4190 Bell Engineering
      Civil Engineering
      Fayetteville, Arkansas  United States  72701
    • Principal Investigators:

      Prinz, Gary S

    • Start Date: 20180813
    • Expected Completion Date: 20200814
    • Actual Completion Date: 0
    • USDOT Program: University Transportation Centers

    Subject/Index Terms

    Filing Info

    • Accession Number: 01681646
    • Record Type: Research project
    • Source Agency: Maritime Transportation Research and Education Center
    • Contract Numbers: 69A3551747130
    • Files: UTC, RiP
    • Created Date: Sep 21 2018 1:36PM