1. Associate Professor, Dept. of Continuum Mechanics and Structural Analysis, Univ. Carlos III of Madrid, Avda. de la Universidad, 30, 28911 Leganés, Madrid, Spain (corresponding author). E-mail: jloya@ing.uc3m.es
2. Assistant Professor, Dept. of Continuum Mechanics and Structural Analysis, Univ. Carlos III of Madrid, Avda. de la Universidad, 30, 28911 Leganés, Madrid, Spain.
3. Full Professor, Dept. of Continuum Mechanics and Structural Analysis, Univ. Carlos III of Madrid, Avda. de la Universidad, 30, 28911 Leganés, Madrid, Spain.