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The aim of this work includes the springback optimisation of bending processes using the concept of experimental design and response surface methodology (RSM). The optimisation method includes two phases. The first involves the objective function prediction using design of experiments and response surface method, while the second is an optimisation process using a FORTRAN gradient algorithm. Springback...
Une opale noble CT de l'Etat de Jalisco (Mexique) presente une structure bidisperse, formee de lepispheres framboides de silice, de deux tailles. Cette structure a pu etre determinee a partir de l'observation au MEB d'un echantillon fracture selon une section proche des plans denses d'empilement. L'etude des marches regulieres a permis de decrire le feuillet elementaire, les positions des deux ensembles...
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