Fig. 4

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Vues du dispositif instrumental. (a) Deux capteurs extensométriques avant leur assemblage ; (b) Un capteur installé dans un centreur et assemblé avec deux tronçons de barre au moyen de manchons (diamètre 28 mm). Photos Soldata.
View of experimental device. (a) Two extensometric sensors before their assembly; (b) A sensor put in a spacer and piled up with two pieces of bar by means of couplers.
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