EVOLUTION MECHANISM ON EDGE CRACK OF ROLLED AZ31B MAGNESIUM ALLOY PLATE

摘要

According to the cockcraft and Latham injury model, the damage value about rolled magnesium plate's edge cracks is calculated. In this study, the cockcraft and Latham injury model is designed as ∫_0~ε_f((σ_p)/σ)dε = C. Three physical parameters needed to be confirmed. Namely: strain ε_f, it is the strain when Mg plate's edge crack occurred. Peak stress σ_p, it is measured by Gleeble-1500D thermal simulation test machine. Equivalent stress σ is the stress which changed with the time. After this the physical parameters were confirmed, the mathematical model to explore stress on the Mg plate's edge region is established.