Local Buckling of Steel Pipelines with Multiple Internal Corrosion Defects A thesis submitted to the Faculty of Graduate and Postdoctoral Affairs in partial fulfillment of the requirements for the degree of Master of Applied Science by Perry Natchieppan B.E. Aeronautical Engineering Anna University, India Department of Civil and Environmental Engineering Carleton University Ottawa, Ontario Ottawa-Carleton Institute of Civil and Environmental Engineering January, 2017 ©2017, Perry Natchieppan