Portland State University. Department of Civil Engineering
Wendelin H. Mueller
Date of Award
Master of Science (M.S.) in Applied Science
1 online resource (129 p.)
Steel tubes, Stress concentration
Using data for the longitudinal residual stress distribution in welded steel tubes, curves describing these distributions are selected for study. Each of these curves are checked for static balance across the tube cross section. The curves that exhibit an imbalance are adjusted by a combination of a simplified model for each and the use of a computer program that is developed to calculate the resulting forces and moments on the cross section. The residual stress in the area of the tube wall opposite the longitudinal weld is found to be the most important in the adjustment to obtain exact equilibrium. The method of adjustment is rational and based on maintaining a smooth curve shape that matches the raw data the closest and producing a curve that is balanced within the accuracy limits required.
Barrett, Steven L., "The effect of residual stress distribution on the ultimate strength of tubular beam-columns" (1980). Dissertations and Theses. Paper 3050.