Effective in situ material properties of micron-sized SiO2 particles in SiO2 particulate polymer composites

摘要: Abstract Several analytical models exist for determination of the Young’s modulus and coefficient thermal expansion (CTE) particulate composites. However, it is necessary to provide accurate material properties particles as input data such in order precisely predict composite’s properties, particularly at high particle loading fractions. In fact, constituent’s size scale often presents a technical challenge accurately measure particles’ or CTE. Moreover, situ may not be same corresponding bulk when are embedded polymer matrix. To have better understanding useful insight design guidelines composites, concept “effective constituent properties” an indirect method were employed this study. This approach allows particle’s by combining experimentally determined composite matrix finite element (FE) predicting then backing out effective properties. The proposed was demonstrated with micron-size SiO 2 reinforced epoxy composites over range fractions up 35 vol.% indirectly determining both CTE particles. best our knowledge, study first published report on micron Similar results measured from nano-indentation testing encouraging.