Effect of Normal Strain on Liquid Adhesive Bonding in Car Manufacturing Process
Due to the rise of multi-material design in car manufacturing adhesive bonding is becoming more important.For structural applications (τ Β >15MPa ) one-component epoxy adhesives (1C-EP) are used because of their adequate mechanical behavior.In contrast to mechanical joining technologies,such as riveting,adherends are fixed only after the curing process of the adhesive.Before the curing process in the electro-coat paint oven,air can penetrate into the layer of the liquid adhesive from the side,if the adhesive is subjected to an elongation.A stretching of the liquid adhesive during the manufacturing process can be caused by relative motion of adherends triggered by concussion or thermal loads and lead to the evolving finger-shaped patterns in the bonding,also called viscous fingering.They are the result of a variant of the Saffman-Taylor instability and can cause waviness in the outside sheet,decrease of aging stability during the car life-cycle and reduction of bonding strength.
adhesive technology viscous fingering
YANG Kai Mi DILGER Klaus STAMMEN Elisabeth WIETHOP Philipp FRAUENHOFER Michael
Institute for Joining and Welding, Technical University of Braunschweig,38106 Braunschweig, Germany AUDI AG, Technology Development Production, Ettinger Straβe, 85057 Ingolstadt, Germany
国际会议
成都
英文
576-580
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）