Abstract
In recent years, studies on reducing the diameter of microcapsules for practical application to self-healing fiber reinforced plastics (FRP) have been conducted. This study clarifies the effects of the diameter and strength of the filler grain and filler volume fraction on the inter-laminar fracture toughness of FRP. The material used for reinforcement in this experiment was carbon fiber. Acrylic particles were used as filler; the mechanical properties were similar to those of microcapsules of self-healing FRP. The filler volume fraction was confirmed to affect the inter-laminar fracture toughness. The smaller grain diameters of the hollow particles and the higher Young's modulus of the filler would lead to the increased inter-laminar fracture toughness. High rigidity and small-grain diameter of microcapsules are considered to be appropriate repair agents for self-healing of carbon fiber reinforced plastics.
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