On the phase transition characteristic of static sealing interface based on lattice leakage model

Sealing mechanism and its transition are not well understood due to the complexity of sealing interface in the micro-scale. A lattice based static sealing predicting model is presented by discretizing and approximating the sealing interface in order to reveal the sealing mechanism. The method of building lattice leakage model is given, the phase transition in sealing interface is researched by carrying out large numbers of numerical experiments based on this model, and meanwhile the mathematical model is obtained by curve fitting the cumulated distributed function. The results show probability of leaking takes on the steep transition around system-related threshold, and the phase transition of the sealing interface is influenced by the size of model and orientation of surface texture. At last the generality of the presented model is discussed by combining with percolation theory and experimental data.