The aim of the MSc thesis is to experimentally determine the stresses and strains generated when a cooling block is mounted on a printed circuit board and to identify which mounting method is the most appropriate in terms of the magnitude of the main strains and stresses. Strain gauge rosettes were mounted on the selected PCB. The rosettes were connected to a measuring device which amplified the signal and converted it into digital form, and the measurements were then monitored using software on a PC. The tightening moment of the screws was determined and different ways of clamping the cooling block to the PCB were implemented. Three measurements were taken for each fixture. From the results, we conclude that the clamping using the spring retaining plate is the most advantageous, because it has the most favourable effect on the deformation and stress state in the selected PCB. In certain cases where the quality of the comparative analysis is limited due to the relatively large scatter of measurement results, it would be reasonable to perform more measurements in the future, under more controlled conditions.
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