Method and device for the study dynamic as a function of the temperature of the viscoelasticity of a composite material comprising a sheet of flexible armature synthetic

摘要

P process and device for the measurement of the viscoelasticity of a material in the form of sheets comprising a reinforcing organic and / or inorganic, synthetic resin impregnated with a flexible. The present invention is characterized in that it is subjected to a sample of the sheet to a cycle of a rise in temperature and that, during this cycle, the sample is maintained stretched between two of its areas spaced apart and it imparts to the one of said areas a reciprocating movement maintained constant amplitude, in a direction which is coplanar with the plane of said sample and transverse to the direction of the voltage that - latter, then it is observed, the amplitude variations of the alternating movement transmitted to the other of said zones with the rise in temperature. / p & & p & the manufacture of composite pieces by hot assembly and, under pressure, a plurality of sheets impregnated with resin. / p