The synergistic effects of material aging and surface texture on the performance and reliability of marine sealing systems

Abstract

This study examines the synergistic effects of surface texture and material aging on the sealing reliability of marine sealing systems. By analyzing the structural characteristics of the seals, it explores how surface texture enhances sealing reliability. Accelerated thermal aging tests were performed to assess changes in sealing performance and reliability under various aging conditions of PTFE (Polytetrafluoroethylene) materials. The results show that long-term aging significantly deteriorates sealing performance, with notable reductions in contact pressure and Von Mises stress, ultimately affecting system reliability. To mitigate this degradation, the study proposes optimizing contact pressure distribution on the sealing surface by incorporating surface textures, thereby improving long-term stability. Finite element simulations indicate that surface texture not only enhances sealing performance in unaged seals but also slows down degradation under aging conditions, improving reliability. Additionally, the study identifies the relationship between surface texture parameters and sealing performance. Finally, it provides a comprehensive assessment of sealing performance under different pre-tightening force conditions and extreme pre-tightening scenarios, offering valuable theoretical insights for the design and optimization of marine sealing systems.