George T. Hahn (ScD, MIT, 1959) is Professor Emeritus of Mechanical Engineering and Materials Science at Vanderbilt University, Nashville, TN. Prior to that he was Manager of the Metal Science Section at Batelle Laboratories in Columbus, OH. He is a Fellow in the American Society of Metals and has published well over 150 papers in the fields of fracture mechanics, rolling contact, and riveted connections.Carol A. Rubin, PE (PhD, Kansas State University, 1966) is a Member, ASME, Applied Mechanics and Computers in Engineering Divisions. Dr. Rubin is Professor in the Department of Mechanical Engineering at Vanderbilt University. Her areas of expertise are finite element analysis and solid mechanics. She has published more than 80 papers in the areas of theoretical mechanics, numerical methods in applied mechanics, contact mechanics, and riveted connections.Kaushik A. Iyer (PhD, Vanderbilt University, 1997) is a Member, ASME, Design and Tribology Divisions. Dr Iyer is on the faculty of the Department of Mechanical Engineering at the University of Michigan. He works for the US Army Research Laboratory in Maryland. He has published nearly 20 papers on topics including riveted connections, contact fatigue, and quenching process modeling.