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Double-lap joint: (a) geometry, dimensions and material parameters; (b) internal forces in investigated joint and direction of x-axis.
Source publication
The use of composite overlays to increase the fatigue life of notched steel samples is discussed in this paper. For such purposes, in the first set of studies, static and fatigue tests as well as the detailed analytical and numerical analyses for samples with double-lap joints were performed. Based on such studies, the shapes of the composite overl...
Contexts in source publication
Context 1
... geometry of the double-lap joint is presented in Figure 6. It is assumed that the joint can be made of different adherend materials determined by thicknesses g i , Young moduli E i and Poisson's ratios ν i , where i = 1 is valid for inner adherend and i = 2 refers to outer adherend (overlays). ...
Context 2
... width of both adherends and adhesive joint is equal to b, which is also the width of the tested samples. The distribution of shear stress in the adhesive layer can be calculated along the x-axis ( Figure 6) from the formula ...
Context 3
... general, the FEM analysis can be performed with different levels of approximation, starting from the analysis of the full 3D model of the double-lap joint, which is the most general approach. In the case of the investigated sample, a full 3D model gives the full set of results, including the deformation and stress distributions not only along the horizontal ('x' direction, see Figure 6) but also in the remaining orthogonal directions. In order to obtain valuable results, relatively dense element mesh should be applied, particularly in the area of the bonded joint and its vicinity. ...
Citations
This paper focuses on the technical and practical aspects arising during the process of window production. One of the phases in the window manufacturing process is welding PVC corners. Therefore, the main subject is the flexural strength of PVC welds in the context of the required quality. In the first part of the paper, the authors highlighted the factors and conditions of the welding process and their influence on the final properties. In the next part of the study, attention is mainly paid to temperature control, which is often the cause of quality problems with welding corners. The welding process was conducted with the use of three types of welding machines, i.e. single-, double and four-head units. In each case, the welding temperature was set in the controller of the machine; at the same time, the contact temperature measurement was taken. The next step was verification of the influence of temperature on the welded PVC corners by measuring the bending force according to PN-EN 514:2002. Additionally, the authors present the DIC (Digital Image Correlation) method used to assess displacements and strains for a selected case in the process of bending PVC corners. The study provides a basis for discussion and remarks about practical advice and identification problems associated with the durability of PVC welding in industrial processes.
