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Powder mixing is a significant step in the manufacturing process of many industrial products such as pharmaceuticals, foodstuffs, plastics, fertilizers, and ceramics. Especially in recent years, with the development of material technology, the importance of powder mixers has increased. But dynamic characteristics of powder mixer is very complex problem. In this paper, a Turbula type mixer has been modeled with the Solidworks® and its nonlinear transient response was investigated by the Finite Element Method (FEM). Finite element analysis (FEA) was used to determine the transient response of the vessel and stirrups under different load conditions. The transient analysis is carried out for different rotation speeds (30, 45, and 60 rev/min) of powder mixer and equivalent stresses on vessel and stirrup were obtained. In addition, 1, 3 and 5 kg mass added to the vessel homogeneously in order to obtain the influence of added mass (represent the powder mass). Results revealed that with increasing rotation speed and added mass, the equivalent stress in the vessel and stirrups increased. Maximum stress occurred in the joint of stirrup and vessel. Commercial software ANSYS Workbench (version 19.2) and nonlinear ANSYS® Mechanical APDL solver have utilized for transient response of powder mixer. [ABSTRACT FROM AUTHOR]

In this work, elasto-plastic stress analysis of single lap joints with and without protrusion in adhesive bondline subjected to tension and bending was carried out using 2D non-linear finite element analysis and confirmed experimentally. AA 2024-T3 aluminum adherends were bonded with SBT 9244 film adhesive. The protrusion was obtained by extending the adhesive film by 2 mm from the overlap length at both overlap ends. Three different adher-end thicknesses and overlap lengths for each loading and bondline type were used. The joints with and without protrusion, for comparison, were loaded with the same load for each adherend thickness and overlap length. Finally, it was observed that the protrusion reduces the strength in the joint under tension, while the protrusion increases the strength in the joint under bending. [ABSTRACT FROM AUTHOR]

In this study, stress analysis of double-strap joints used to fasten parts, particularly in aircraft and automotive industries and in the repair of damaged parts, was done using the finite element method. In classical double-strap adhesive joints, patch parts are bonded to the outer surface and these parts resist air flow. To decrease this effect and for constructive and aesthetic requirements, patch parts were embedded into the adherends. The effects of embedded patch parts on failure loads and stress distributions were investigated experimentally and numerically. For this purpose, AA 2024-T3 aluminum adherends with four different thicknesses (4.8, 5.6, 6.4 and 7.2 mm) were bonded as double patches with 0.4, 0.8 and 1.2 mm spring steel patch thicknesses and 20, 40 and 60 mm overlap lengths. The stress analyses were done under plain strain assumption. To verify the finite element model, experiments were carried out. The results show that adherends and patch thicknesses as well as overlap length all have considerable influence on failure loads and stress distributions. [ABSTRACT FROM AUTHOR]

This paper presents an approach to predicting the failure and strength of joints bonded with a film-type adhesive (FM 73) using non-linear finite element method. First, lap-shear tests on Single-Lap Joints (SLJs) with different adherend thicknesses and overlap lengths were carried out and fracture surfaces of the SLJs were examined by scanning electron microscopy (SEM). Then, the stress analyses in the SLJs using a non-linear finite element method were performed by considering both the geometrical non-linearity and non-linear material behaviors of both adhesive and adherend (AA2024-T3), and Finite Element Analysis (FEA) results were compared with experimental results. Two different failure loci were seen when the failure surfaces of the SLJs were examined and both the stress analyses and experimental results showed that a catastrophic failure occured around the central zone of the overlap due to the effect of shear stresses, while the failure at the free edges of the adhesive layer originated from the peel stress in tension. [ABSTRACT FROM AUTHOR]

Abstract: The stresses and deformations in the shrink-fitted hub–shaft joint for various fit forms have been analysed using finite element method. First, the results of finite element method (FEM) were compared with the results of Lame’s equations along central radial line of one shrink fit type for accuracy of model and it was proved by these results. Then, the most appropriate fit type was investigated. It was observed that the most effective parameter to determine appropriate fit type is to be stepped or not for shaft and the geometries of hub of which edges were wasted have been found as more appropriate to reduce the stresses and deformations. Finally, it was also observed that the each point of the shaft or the hub at the moment of the first meeting to its partner during fit can enter the plastic region, and this situation must be taken into consideration as design parameter. [Copyright &y& Elsevier]

In this work, elasto-plastic stress analysis of a Single Lap Joint (SLJ) subjected to bending moment was investigated using 2D non-linear Finite Element Analysis (FEA). The SLJs, consisting of hardened steel as the adherend bonded by two adhesives, one stiff and one flexible, with very different mechanical behaviors were analyzed. In order to determine the effect of geometrical parameters on the performance of the SLJs, four different adherend thicknesses and overlap lengths for each adhesive were used. For verification of the analysis, the FEA results were compared with experimental results. It was observed that there was a significant effect of adherend thickness on the strength of the joint with both adhesives. However, the load carried by the SLJ with the flexible adhesive increased with increasing overlap length. [ABSTRACT FROM AUTHOR]

Abstract: In the present study, it is aimed to compare mechanical behaviors of T-joint types with embedded and non-embedded supports subjected to bending moment. For this purpose, after experimental studies on the two different T-joint types were conducted, stress analyses in the T-joints were performed with a three-dimensional finite element method by considering the geometrical non-linearity and the material non-linearities of the adhesive (DP460) and adherend (AA2024-T3). Finally, stress analyses and experimental results show that the variation of the geometry of the bonding zone, e.g., embedding the supports, would change the stress distributions and strength of the joint. Additionally, it is seen that T-joints with embedded supports carry 30% more load than T-joints with non-embedded supports although their bending stiffnesses decrease. [Copyright &y& Elsevier]