Celem pracy było wyznaczenie zależności analitycznej określającej naprężenia w spoinach klejowych, spowodowane zmianą temperatury złącza oraz weryfikacja tej zależności przy wykorzystaniu dostępnych wyników badań numerycznych [4,5].
EN
The aim of the work was to assign analytical dependence which is describing tension in adhesive joins due to change in connection temperature and verification of this dependance using numerical methods [4,5].
2
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The article provides a comparative analysis of the failure force of bonded and soldered joints of steel E335. This material is used as an application in aerospace. There were examined the bonded joints with glue WK-3 and the soldered joints with brass solder. This article describes the use of two surface treatment methods of the tested sheets: the etching and abrasive blasting with specific characteristics. During those tests the failure force was compared, and the strength of bonded and soldered joints was determined. During the tests carried out on samples of joining by soldering, there was observed the destruction of joining material. In this case, the strength of the soldered joint was greater than the strength of a joining material. Due to slight differences in the values of failure forces and the strength of sheet steel E335 it can be noticed that, in the case of kinds of joints, the analysed variants of the surface treatment do not cause any significant differences in the strength of joints.
3
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Zaproponowano metodę eksperymentalnego wyznaczania wartości modułu Younga kleju. Przedstawiono również metodę wyznaczania krzywej naprężenie-odkształcenie kleju, niezbędnej do definiowania właściwości mechanicznych kleju podczas obliczeń numerycznych połączeń klejowych w zakresie nieliniowym.
EN
The work proposes a experimental method for determining Young's modulus of adhesive. The paper proposes a method for determining mechanical properties of adhesive layers (necessary for numerical calculations) by the means of samples from glue cast subjected to compression.
4
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In the work results of FEM (finite element method) analysis of influence of surface geometrical structure on stresses state in adhesive joint are described. Surfaces with triangular profile and spherical roughness profile are analyzed. FEM calculations show that surface roughness are stresses micro-concentrators, which have influence on stresses state in adhesive joint. Deciding influence on stresses concentration have two parameters, which are: maximum peak height roughness Rz and the mean spacing between profile peaks RSm. Geometrical structure has the biggest influence on normal stresses state in direction of X-axis (tensile stress - S11) and on normal stresses in direction of Y-axis (tear off stresses - S22).
5
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