Лако-красочные материалы — производство

As exposed above, three experimental campaigns were performed, involving HJs and SFJs. Referring to the three campaigns the results are presented in the three sub Sections below. When dealing with HJs, the estimation of the coefficient of friction in dry press-fitted conditions is also reported. A comparison between the results of the three campaigns is […]

The experimentation was split into three campaigns. The first two ones involved HJs, with four different ERs. Two different interference levels were considered: in particular a higher level in the first campaign and a lower level in the second one. The third campaign involved SFJs with two different ERs (the extreme levels only were considered). […]

The fundamental design parameter of press-fitted and adhesively bonded couplings is the axial release force Ftot. Based on the principle of the superposition of the effects, Ftot can be computed as in Eq. (1), by combining the effects of interference (Fint) and of adhesion (Fad). The first term, Fint [N], depends on the axial static […]

The paper deals with the response of a high strength, single component adhesive that cures in absence of oxygen (anaerobic). Its commercial name is LOCTITE648®, a specifically developed product for cylindrical joints with or without interference. The typical product performances are reported in [16]. (c) Figure 1. Hub specimens, with ER=0.4 (a), ER=0.8 (b), ER=1.3 […]

Specimen Design As explained in the Introduction Section, the aim of the research was to study the effect of the ER on joint performance. Thus, the first step has consisted in the determination of the most suitable range of the ER to be investigated. The Standard ISO 10123 [13], specific for pin-collar specimens, suggests a […]

D. Croccolo * M. De Agostinis, G. Olmi and P. Mauri University of Bologna — DIN, Bologna, Italy Abstract Press fitted and adhesively bonded joints give several advantages: among others, they lead to smaller constructions for a given load capacity, or to stronger constructions for a given size. For that reason, the static and fatigue […]

The rolling test was employed to simulate the fatigue stress that the wheel undergoes during its operating life on vehicles. In this test the wheel is placed on a roller and it is subjected to rolling cycles. The machine is able to apply a radial load and a lateral load to simulate the use on […]

The wheel shear test provides precise information on the shear resistance of the wheel joint. In this test, the disk is pulled out from the rim that cannot be plastically deformed, because of constraints. Also the disk is not able to deform as the load acts on a disk shaped mold placed inside it. Thus, […]

The coupling load/displacement curves of the bonded wheels were collected during press-fitting. The mean curves of five samples for each case (A, B and C) are reported in figure 14. Figure 14. Comparison among the mean coupling curves of bonded wheels for the different fitting-force cases. All the samples were assembled by using the same […]

Nowadays steel wheels and aluminum alloy wheels own about 50 % of the market share. Often aluminum alloy wheels are preferred for their thin-spoke appearance, but in a field dominated by the constant request of weight and consumption reduction, the automakers more frequently opt for steel wheels to trim the weight of their products as […]