Лако-красочные материалы — производство

Interference fitted and adhesively bonded joints, also known as hybrid joints (HJs), are an effective means to emphasize the transferable load while reducing both the weight and the stress level of the joined components [1]. Hybrid joints usually involve two axisymmetric members and a high strength, single component, anaerobic adhesive like LOCTITE648. Many researches evaluated the strength of HJs in dependence of several variables, such as the assembly pressure level [2,3], the type of materials in contact [4-6], the curing methodology [7], the operating temperature [8,9] and the loading type [10­12]. Interference level can be produced by different joining techniques: by driving the shaft into the hub with a standing press at R. T., by heating the hub then driving the shaft (kept at R. T.) into the hub, and finally by cooling the shaft then driving it into the hub (kept at R. T.). The first technique is called ‘press fit’, the other two are known as ‘shrink fit’ and ‘cryogenic fit’, respectively. To the authors’ best knowledge, no experimentation has still been done to assess the static shear strength of HJs in dependence of the method by which interference is obtained. This research aims at filling the gap, by making comparisons between the shear strength of hybrid joints realized by the above mentioned assembly techniques.