للكاتبين Nafa Z.1,2, Chaplain M.1, Morlier P.1, Guenfoud M.2
1 LRBB, Université Bordeaux1, 69 route d’Arcachon 33612 Cestas Cedex, France
2 LGCH, Université 08 mai 45, BP 401, 24000 Guelma, Algérie
The aim of this paper is to study the behaviour and the lifetime of beams in glued-laminated (GL)
under cyclic torsion. Experimental programmes have been carried out: Periodic triangular
alternate torque with varying amplitude are applied to GL beams with rectangular cross section.
Experimental lifetime is presented by semi logarithmic SL-N curves (SL is torque stress level and
N is failure cycles number). From angular distortion records, we propose a method to obtain the
damage evolution versus time. Duration of load prediction of GL beams under cyclic torque is
approached by a damage theory.