Thank you . I have kept the percentage really less starting from 0.15% of cement. I have generated the results also, I used UD Random Composite, it gave the results, but to study the effect of orientation I wanted to model in Chopped Fiber Composite, but there it is showing some memory issue. I have a 8GB Ram laptop, it says it needs 4GB, but still it is not working.nIt is asking to increase the virtual memory, I tried that also. But still it is having memory problem.nAlso I performed the compression on the cuboid of size 150mm, as I increase the % of CNT the total deformation and equivalent stress is decreasing but the normal stress is increasing, what can be the mistake?n