1. Ph.D. Student, São Carlos School of Engineering, Univ. of São Paulo, Ave. Trabalhador Saocarlense, 400, 13566-590 São Carlos, SP, Brazil.
2. Professor, São Carlos School of Engineering, Univ. of São Paulo, Ave. Trabalhador Saocarlense, 400, 13566-590 São Carlos, SP, Brazil.
3. Professor, São Carlos School of Engineering, Univ. of São Paulo, Ave. Trabalhador Saocarlense, 400, 13566-590 São Carlos, SP, Brazil (corresponding author).