The experimental study and mathematical model of the effect of alumina particles reinforcement on mechanical properties of epoxy

Abstract EN

This article describes some mechanical properties of alumina-filled epoxy composites.

In this work, the epoxy matrix was reinforced with increasing amount of alumina particles in the range of 0-40 % by weight with different particle ≤s8i,z e 18(≤ dd ≤ 25, 33 ≤ d ≤ 45, 50 ≤ d ≤ 62)μm.

From the flexural test results, it was observed that the flexural modulus increases with increasing α-alumina content from 10 to 40 wt %.

At the same time, the results indicated that there are no much effect on the flexural modulus with change the particle size in the range of (d ≤ 8, 18 ≤ d ≤ 25)μm.

The highest value of flexural modulus was recorded with 40 wt % of α-alumina content and (d ≤ 8)μm particle size.

It was also found that the 40 wt % alumina content and (d ≤ 8)μm particle size recorded the highest value of fracture toughne ss (Gc), fracture toughness (Kc), hardness (HB), and wear resistance which were improved by (253 %, 282 %, 230 %, and 82 %), respectively.

Also, in this work a mathematical modeling is implemented and regression equations are obtained by using (SPSS) software to predict the properties of alumina filled epoxy composites.

Comparing the predicted and measured values gives high prediction accuracy.

The accuracy of prediction has been (90.13 %, 85.95 %, 90.28 %, 89.76 %, and 84.36 %) for flexural modulus, toughness, fracture toughness, hardness, and wear rate respectively.