Investigation of fibre orientation using SEM micrograph and prediction of mechanical properties through micromechanical modelling

Bulletin of Materials Science

关键词: Polypropylene;    sisal fibre;    fibre orientation distribution;    orientation tensor;    micromechanical modelling.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The present study concerns the fabrication of short sisal fibre-reinforced polypropylene (PP/SF) composites by melt mixing with different fibre length (3, 6 and 10 mm) comprising of 70% of matrix PP and 30% of SFs followed by injection moulding. The PP/MA-g-PP/SF composites were prepared with the ratio of 65:5:30 with the optimized fibre length of 6 mm at different mould temperatures (25, 45 and 65$^{\circ}$C) in a similar fashion. This work also further extended to study the effect of fibre orientation of the composites by numerical calculation of secondorder orientation tensor. To evaluate the fibre orientations PP/MA-g-PP/SF composites at different mould temperatures,scanning electron microscope micrographs were used to estimate the accurate principal directions and two-dimensional fibre orientation distributions through centre coordinates of the elliptical fibre images. Finally, a mathematical model of modified rule of mixture was adopted to compare the predicted tensile strength and modulus with the experimental findings.

【 授权许可】

CC BY