Analysis Of Durometer Hardness

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dimensions are 10 mm × 10 mm × 55 mm and V- notch made at angle of 45° with a depth of 2 mm then the experiment was done and values were tabulated.
3.3 SHORE DUROMETER HARDNESS STRENGTH
Hardness was defined as materials resisting property to prevent permanent indentation. Durometer is a measure of hardness in polymers, fibre and rubbers where it measures the indentation depth in the material. According to ASTM D2240 tests were conducted on specimen using Durometer in the room temperature [5]. The test is done on the surface by supplying load and measuring the indentation. The material under test must be a minimum of 6.4 mm thickness. It was carried out in different locations and the readings were tabulated. The indentation was measured and
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Impact characteristics of fabricated materials depends upon resisting factor. Impact strength of all the fabricated materials is indicated in the table 1. From figure 2 (b), we concluded that material E with 5% mica has great impact strength of 0.156 Kgm when compared with other fabricated materials this is due to the high level of silica content present in it which provides very good hardness property so these results in better absorption of energy when weight is allowed to strike the material and this prevents the crack formation. Impact strength decreases when no filler materials are added to it. In case of no filler materials it has low matrix continuity between matrix and fibre with low capacity of absorption, which results in micro crack initiation which leads to failure so value was less, Then material D with 2% silicon carbide and activated charcoal shows 0.110 Kgm because silicon carbide has high hardness and excellent thermal shock resistance, but activated charcoal reacted with that lead to decrease its impact strength and its value is less than material E. The Test results shows that by adding mica to the material we can get better impact strength. From this we came to a conclusion that we should not add silicon carbide and activated charcoal. By adding mica to the material we can increase the impact …show more content…
However, the term may also refer to stiffness or resistance. Hardness characteristics of fabricated materials are presented in the table 1. From these results it shows that fabricated materials C filled by 2% charcoal shows the highest hardness number of 72 IRHD when compared with other filled fabricated materials. The reason behind that is due to continuous deposition of activated charcoal powder over the fabricated material. It has a great bonding capacity between fibre and matrix. From figure 1 (c), we came to a solution that increases in addition of silicon carbide to the fabricated materials lead to increase in hardness number and hardness property [3]. This may be due to improved capacity of bonding between the fibre and reinforcement. When increasing the filler material loading in matrix surface which reduces the indentation so values are low. Mica filled material shows low hardness number due to bond strength. The Test result shows that by adding charcoal we can get better hardness

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