粒子強化アルミニウム合金の損傷解析

抄録

The tensile deformation and damage behavior of 2024-T6 aluminum alloy reinforced by 2% and 10% SiC particles are studied. SEM (Scanning Electron Microscope) observation shows that the fracture occurs due to the dimple fracture of matrix, interfacial debonding of particle and matrix and particle cracking. These fracture processes are simulated numerically using Gurson's constitutive equation with large-deformation theory. It is shown that the nonuniform distributions of particles have a large effect on the microfracture process, and the effect of the initial debonding and particle cracking are discussed.