“…4. A crack with the length of 1 mm was prefabricated using DK-decreasing method [19,20]. Then the crack propagated under the constant stress (S m = 120 MPa), which was recorded using a digital camera system.…”
“…4. A crack with the length of 1 mm was prefabricated using DK-decreasing method [19,20]. Then the crack propagated under the constant stress (S m = 120 MPa), which was recorded using a digital camera system.…”
“…Most of the research on silica/epoxy composites has concentrated on studying the effects of particle size and volume fraction, mostly high particle loadings (i.e., V F > 10%), on the mechanical properties [6,19,25]. Not a lot of attention has been paid to studying the mechanical response of silica/epoxy composites in the limit of a low volume fraction of silica fillers.…”
“…On the other hand, epoxy resin is rather brittle and has poor fracture toughness. For this reason, the addition of fibres/ particles into thermoset polymer can be used to enhance strength and toughness for several structural applications [4]. Silica, alumina, and glass particles have been used as filler to reinforce polymeric composites.…”
Thermoset polymers, especially epoxy resin, have been applied in several industrial applications in which high stiffness and adhesive strength are demanded. On the other hand, epoxy resin is rather brittle and has poor fracture toughness. For this reason, the addition of fibres/particles into thermoset polymer can be used to enhance strength and toughness for several structural applications. This work investigated the addition of silica microparticles and maleic anhydride (as a coupling agent between the phases) into epoxy resin, which will be used as the matrix phase of hybrid biocomposites. A full factorial design was conducted to evaluate the effect of silica microparticles and chemical additive into the epoxy matrix under compressive loadings. Apparent density was also evaluated. Experimental factors such as weight fraction of silica microparticles (0, 20, and 33.3 wt%) and weight fraction of maleic anhydride (0 and 2 wt%) were investigated. The statistical analysis revealed that the main factors 'chemical additive' and 'silica addition' significantly affected the compressive modulus of the composites.
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