In situ measurement of reinforcement stress in an aluminum-alumina metal matrix composite under compressive loading

摘要: Abstract The phenomena of stress partitioning between the matrix and reinforcements in a loaded metal composite dominate mechanical behavior these materials. Numerical models for estimating reinforcement under load are well developed. However, direct experimental measurements (e.g. measurement stress) more difficult have not been widely undertaken at present. objective present work was to measure situ hydrostatic ceramic continuously reinforced transverse compression (i.e. loading perpendicular fiber axis). A single crystal sapphire AA6061 model (reinforcement volume fraction ∼10%) used measurements, which were applied strains 5, 10 20%. utilized piezo-spectroscopic property Cr 3+ ions as impurities reinforcements. compressive deformation simulated using an isotropic, plane strain finite element model. estimates from isotropic FEM suitably modified incorporate effects anisotropy properties crystal. mean values matched with numerical estimates.