水環境下におけるガラス繊維分散強化プラスチックの AE 法による破壊じん性に関する研究(<小特集>強化プラスチックス小特集)

概要

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The present paper is concerned with the fracture toughness of a chopped strand reinforced polyester in water environment. Fracture toughness tests were performed by using compact tension specimens of the composite in distilled water. Acoustic emission signals were detected during the fracture toughness tests. The acoustic emission activity for the specimen in water was extremely lower than that in room condition. After the test the scanning electron microscope observation was made to explain the difference between the fracture behavior in water and that in room condition. When the fracture toughness K_<p,AE> was defind as the critical stress intensity factor corresponding to the onset of the abrupt increase of acoustic emission energy, it was found that the fracture toughness decreased with immersion time and the rate of increase became almost zero at about 60 days of immersion time.
社団法人日本材料学会の論文
1986-05-15