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The influence of joined elements thickness on the strength of a plastic glue joint

Ziółkowski Wojciech, Kotyk Maciej, Maćkowiak Paweł

Postępy w Inżynierii Mechanicznej

2019

nr 13(7)

73--81

W artykule przedstawiono wyniki autorskich badań wpływu grubości łączonych ze sobą blach na wytrzymałość złącza klejonego. Obiekt badań stanowiły łączone w sposób zakładkowy za pomocą kleju Plexus MA 300 płaskowniki wykonane ze stopu aluminium PA 9. Na podstawie przeprowadzonych badań stwierdzono, że grubość łączonych blach w badanym zakresie wpływa na wytrzymałość złącza, przy czym wytrzymałość rośnie wprost proporcjonalnie do grubości łączonych blach.

The article presents the results of the author's research on the impact of thicknesses of joined sheets on the strength of the glued joint. In the experiment sheets welded together, made of aluminum PA 9, were welded together. Based on the tests of weld strength made of Plexus MA 300 adhesive, it was found that the thickness of the joined sheets in the tested range affects the strength of the joint, while the strength increases in direct proportion to the thickness of joined sheets.

Exact thermomechanical analysis of functionally graded (FG) thick-walled spheres

Yildirim V.

Mechanics and Mechanical Engineering

2018

Vol. 22, nr 4

1197--1221

The present study aims to provide a deeper understanding for the thermo-mechanical analysis of spheres made of non-homogeneous isotropic materials. To this end, Navier equations are solved analytically based on the spherically-symmetric plain-strain assumptions and closed-form formulas are proposed for the elastic fields in a simple-power-law graded spheres subjected to steady-state thermal and internal/external pressure loads. A comprehensive parametric study is then performed with both functionally-graded hypothetical and physical materials. Two benchmark examples are reconsidered with hypothetically chosen inhomogeneity indexes. Effects of inhomogeneity indexes are reviewed in these examples. Differently from the literature, thickness effects are also examined under separate and combined loads together with the thermo-mechanical behavioral differences in spheres and cylinders. Finally three physical metal-ceramic pairs are studied originally with appropriate inhomogeneity indexes which are deffned as the inner surface is full ceramic and the outer surface is full metal. Results are presented in graphical and tabular forms.

Preparation and spectroscopic analysis of zinc oxide nanorod thin films of different thicknesses

Mia N. H., Rana S. M., Pervez F., Rahman M. R., Hossain K., Al Mortuza A., Basher M. K., Hoq M.

Materials Science Poland

2017

Vol. 35, No. 3

501--510

Zinc oxide thin films with different thicknesses were prepared on microscopic glass slides by sol-gel spin coating method, then hydrothermal process was applied to produce zinc oxide nanorod arrays. The nanorod thin films were characterized by various spectroscopic methods of analysis. From the images of field emission scanning electron microscope (FESEM), it was observed that for the film thickness up to 200 nm the formed nanorods with wurtzite hexagonal structure were uniformly distributed over the entire surface substrate. From X-ray diffraction analysis it was revealed that the thin films had good polycrystalline nature with highly preferred c-axis orientation along (0 0 2) plane. The optical characterization done by UV-Vis spectrometer showed that all the films had high transparency of 83 % to 96 % in the visible region and sharp cut off at ultraviolet region of electromagnetic spectrum. The band gap of the films decreased as their thickness increased. Energy dispersive X-ray spectroscopy (EDS) showed the presence of zinc and oxygen elements in the films and Fourier transform infrared spectroscopy (FT-IR) revealed the chemical composition of ZnO in the film.