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Bending Strength of Fibers - Hydroquinone Resin Composites | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 21, Issue 5, 2010, Pages 14-19 | ||
| Author | ||
| Bending Strength of Fibers - Hydroquinone Resin Composites | ||
| Abstract | ||
| Bending strength for phenolic resin type (hydroquinone resin) reinforced E-glass and carbon fiber have been studied, in terms of mechanical properties, which are subject to changes in fiber volume fraction. The specimens candidates for this study were pure matrix hydroquinone, carbon fibers hydroquinone composites, and E-glass fibers hydroquinone composites with (20, 40, 60, and 70) Vol. % . Hot press technique was used to prepare the composites as well as hydroquinone specimens using flash mold at standard conditions. The bending testing machine type Instron was used in 3- points bending strength mode to calculate the yield point, Young modulus, and flexural strength according to standard ASTM D 790. Bending strength results show that the strength values were increased progressively by succession of volume fraction of fibers in general. For E- glass mat composites, flexural strength results showed a linear dependence with the fibers volume fraction. These linear relationships are strongly influenced with the reinforced condition and they are attributed to the response of the composites to the bending test conditions. Such responses were appeared as plastic deformation associated with the damage observed. The experimental observation of the failure specimens are in good agreement with fracture mechanism, which concerned with pull out mechanism. Hardness and densities values coupled with optical microscopy were evidenced to the results | ||
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