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Residual Ultimate Buckling Strength of Steel Stiffened Panels Subjected to Corrosion Damage

Fox, Elijah D.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1493987459107873

Abstract Details

2017, Master of Science in Engineering, University of Akron, Civil Engineering.
Corrosion is a naturally occurring electro-chemical process that causes damage in the form of surface material deterioration on metal structures. In many industries, particularly naval ships, it is common to assess the corrosion damage of structural components primarily based on visual inspection with limited or no structural stress analysis. Premature replacement of such components can prove expensive over time while delayed replacement of these components might be a safety concern. The overall goal in the assessment of remaining life is to relate thickness loss in the system to the performance of individual structural elements in order to better predict the remaining life of the structure. This methodology will be applied to some of the structural steel configurations that are of importance in naval applications. Corrosion damages on naval ships are mainly categorized as: uniform (general) corrosion, pitting corrosion, non-uniform, and grooving corrosion. This proposed study will investigate the effects of various intensities of uniform corrosion on the remaining ultimate buckling strength of stiffened panel under combined loading. While visual inspection of uniform (general) corrosion may be used industry wide, without qualitative research to support the quantitative data collected during visual inspection, this technique can prove un-reliable. This is due to the inability to accurately measure the thickness loss of the corroded surface. The objective of this study is to understand the relationship between increased levels of uniform corrosion and the decrease in remaining ultimate buckling strength of stiffened panel while being subjected to combined axial compression and lateral pressure. As a continuing effort to understand the various other forms of corrosion, we are tasked with developing a method to produce pitting and grooving corrosion in a laboratory setting. In order to achieve this objective, a series of finite element analysis (FEA) models are conducted for stiffened panels subjected to combined loading with and without uniform corrosion damage. The FEA software package called ABAQUS is used to conduct these analyses. ASTM A572 grade 50 structural steel is the material used for the experimental testing and FEA models. Accelerated corrosion was performed on fabricated stiffened panels using the B117 method outlined in American Society for Testing and Materials (ASTM). The non-corroded and corroded stiffened panel specimens are mechanically tested under axial compression and the result are compared with the FEA results and industry guidelines. The FEA results and the experimental panel test data will provide a basis for developing a preliminary method to predict the remaining ultimate buckling strength of stiffened panels exposed to uniform corrosion under combined loading conditions. Based on the correlation between increased corrosion damage and the load of ultimate strength, the goal of this researched is to also act as a precursor to future works and help aid in the development of a visual inspection rating tool supported by qualitative data and/or modify preexisting design codes to include corrosion damage.
Anil Patnaik, Dr. (Advisor)
Craig Menzemer, Dr. (Committee Chair)
Ping Yi, Dr. (Committee Chair)
163 p.
Civil Engineering; Engineering
A-572 steel, uniform corrosion, pitting corrosion, grooving corrosion, axial compression, lateral pressure, stiffened panel, FEA, combined loading,

Recommended Citations

Citations

  • Fox, E. D. (2017). Residual Ultimate Buckling Strength of Steel Stiffened Panels Subjected to Corrosion Damage [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1493987459107873

    APA Style (7th edition)

  • Fox, Elijah. Residual Ultimate Buckling Strength of Steel Stiffened Panels Subjected to Corrosion Damage. 2017. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1493987459107873.

    MLA Style (8th edition)

  • Fox, Elijah. "Residual Ultimate Buckling Strength of Steel Stiffened Panels Subjected to Corrosion Damage." Master's thesis, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1493987459107873

    Chicago Manual of Style (17th edition)

akron1493987459107873
411
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This open access ETD is published by University of Akron and OhioLINK.