Development of similarity-based scaling criteria for creep age forming of large/extra-large panels

摘要: A scaling method is developed for the creep age forming (CAF) process to downscale manufacturing of large/extra-large panels lab-scale experimental trials industrial application. Similarity theory applied identify both geometrical and physical (non-geometrical) similarities between large-size prototypes scaled-down models in all stages CAF, including loading, stress-relaxation unloading (springback). constitutive model incorporated into order similarity highly non-linear behaviour aluminium alloy plates during obtain effective criteria CAFed after springback. The was demonstrated by down CAF singly curved doubly large under proportional non-proportional conditions. analytical results numerical obtained FE modelling were found be good agreement. Scaling diagrams linking key deformation (springback) structural (flexural rigidity) variables ratios conditions generated, have been validated corresponding experiments. this study provides guidance on design will used practical panels.