A FINITE ELEMENT MODEL OF A SEMI-TRAILER LEAF SPRING INCLUDING FRICTION BETWEEN LEAVES. Authors: Jorge Rodriguez Matienzo Department of Applied Mechanics, CUJAE, Calle 127 s/n, Marianao, La Habana, Cuba. Tel + (537) 260-2267; fax + (537) 27-2964 e-mail matienzo@mecanica.cujae.edu.cu