In recent years, quadruple and multi-pane insulating glazing units have been the subject of extensive research, as they offer great potential for reducing building energy losses and improving occupant comfort. Their wider adoption is primarily limited by the question of the long-term durability of the primary polyisobutylene (PIB) sealant, which is exposed throughout its service life to a combination of thermal, pressure, and tensile loads. In this master thesis, we first identified the key loading mechanisms and then incorporated them into a numerical model. Using Abaqus, we successfully developed a numerical model of multi-pane glazing that enables efficient simulation of the sealant’s multi-year loading. The results show that PIB is locally subjected to pronounced deformations, confirming its critical influence on the long-term reliability of multi-pane insulating glazing units.
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