A New Method to Characterize the Mechanical Resistance to Perforation of Polymeric Films
The low thermal conductivity of PIV is provided by maintaining the silica core under vacuum with the barrier envelope.A defect on the surface,generated by the manufacture of VIP and its installation,may result in a loss of the vacuum and therefore thermal insulation of the VIP.The essential work of fracture (EWF) is an efficient way to characterize the fracture polymeric films.One can gain valuable information on the resistance to perforation and propagation of flaws.VIP ageing in severe conditions may degrade the morphology of the different layers of the envelope barrier.Various authors brought to light the relationship between physico-chemical properties (crystallinity,chain length) and mechanical properties from the EWF method.The latter however,requires the use of up to 5 samples.A new technique will be presented with which the same amount of information may be obtained with a single sample.It is useful to probe the heterogeneous behavior of the degradation of the envelope.
essential work of fracture (EWF) polymeric films photoelasticimetry birefringence
Florence Dubelley Emilie Planès Corine Bas Bernard Yrieix Lionel Flandin
Univ.Savoie, LEPMI, F-73000 Chambéry, France;CNRS, LEPMI, F-38000 Grenoble, France EDF R&D, Matériaux et Mécanique des Composants, Site des Renardières, 77818 Moret-sur-Loing Cedex, F
国际会议
The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)
南京
英文
276-279
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）