Prediction of Random Crack Propagation Life of Thin Porous Plate with Multiple Site Damage

Based on the crack propagation rate test of LY12CZ aluminum alloy flat plate, the distribution characteristics of Paris formula parameters were characterized by the three-parameter logarithmic normal distribution, and a LY12CZ random crack propagation analysis method was established. By using the Monte-Carlo method to simulate the randomness of crack growth, a prediction model of the random crack propagation life of a thin porous plate with multiple site damage (MSD) was established and programmed. The model can accurately predict the crack growth life and failure probability of thin porous plates with MSD, which provides an effective engineering analysis method for the MSD evaluation of the thin plate structure with multiple holes.