1. 797 Rhodes Hall, Box 210070, Center of Excellence in DYNA3D Analysis College of Engineering, Department of Aerospace Eng. & Eng. Mechanics, University of Cincinnati, Cincinnati, OH 45221-0070,
2. 797 Rhodes Hall, Box 210070, Center of Excellence in DYNA3D Analysis College of Engineering, Department of Aerospace Eng. & Eng. Mechanics, University of Cincinnati, Cincinnati, OH 45221-0070