ガラス繊維強化プラスチック (GFRP) の種々の破壊挙動におよぼすマトリックス特性の影響

概要

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Three kinds of unsaturated polyester resins having different toughness were used as the matrix of GFRP and their influences on the interlaminar fracture toughness, behaviour of penetrating impact and stress corrosion cracking of GFRP were studied. The results obtained were as follows : (1) The fracture toughness of matrix resin influenced the interlaminar fracture toughness of GFRP. (2) In the penetrating impact test, the energy absorbed from the beginning to the maximum load was strongly dependent on the fracture toughness of matrix resin, while the total penetrating energy absorbed was related little to the properties of resin. This is considered as a result of widening of the damage area which compensated the insufficiency of the fracture toughness of matrix resin. (3) From the stress corrosion cracking test, a linear relation was found between the stress intensity factor K_I and the crack growth rate or the time to failure. This indicates that these parameters have close relation to the fracture toughness of matrix resin.
社団法人日本材料学会の論文
1992-11-15