Study on properties of microencapsulated self-healing carbon fiber reinforced composites
In order to analyze the mechanical properties of carbon fiber reinforced plastics(CFRP)embedded with epoxy resin microcapsules,experimental study on mechanical properties of materials under quasi-static loading was carried out.The static mechanical properties of carbon fiber reinforced composites with and without microcapsules were compared.The effects of the mass fraction of microcapsules on the mechanical properties and self-healing properties of carbon fiber composites were investigated in detail.The tensile properties,elastic modulus,elongation at break and self-healing properties of the materials were analyzed.Under the same impact energy,the impact test of laminates with different microcapsule content was carried out by using drop weight method to study the dynamic mechanical response of laminates under impact load.The results show that the microcapsules have toughening effect and self-healing ability.With the increase of microcapsule mass fraction,the tensile strength of self-healing carbon fiber reinforced composite decreases,the elastic modulus increases slightly at first and then decreases,and the fracture elongation decreases first and then increases,but the overall change is little.Under the same impact energy,the larger the microcapsule content,the smaller the maximum impact force,the smaller the impact-displacement curve slope,the worse the impact resistance.The research results can provide reference for the practical engineering application and theoretical research of self-healing CFRP materials.
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