1. Professor, Dept. of Materials Science and Engineering, Univ. of Cantabria, E.T.S.I. Caminos, Canales y Puertos, Avda. de los Castros s/n, 39005 Santander, Spain.
2. Dipl.-Ing., Dept. of Structural and Mechanical Engineering, Univ. of Cantabria, E.T.S.I. Caminos, Canales y Puertos, Avda. de los Castros s/n, 39005 Santander, Spain.