Multiaxial Fatigue of Notched Steel Plates and Investigation of CFRP Retrofits for Crack Initiation Prevention
Date of Graduation
Bachelor of Science in Civil Engineering
Committee Member/Second Reader
Fatigue cracks are cracks that result from repeated loading over time, often following millions of loading cycles. Fatigue cracks occur even if the applied load is not large enough to cause material yield. Once a fatigue crack initiates, resulting stress concentrations at the crack tip often make it difficult to arrest the growth of the crack. In order to prevent growth and propagation of fatigue cracks within structural components, it is necessary to alter the stress condition at the crack tip. Fatigue cracks in steel structures resulting from multiaxial loading and or geometry conditions that result in complex states of stress  can be particularly challenging to address, as many existing crack mitigation approaches (which aim to alter the crack-tip stress) often target uniaxial stress conditions. The objective of this research project is to observe how cracks initiate and develop in notched steel plates under different multi-axial stress states, and to assess the effectiveness of carbon fiber reinforced polymer (CFRP) orientations as a retrofit strategy to delay fatigue crack growth.
Fujii, A. (2020). Multiaxial Fatigue of Notched Steel Plates and Investigation of CFRP Retrofits for Crack Initiation Prevention. Civil Engineering Undergraduate Honors Theses Retrieved from https://scholarworks.uark.edu/cveguht/61