炭素繊維強化窒化ケイ素複合材料の破損過程での破壊表面積及び実破壊エネルギーの変化

概要

論文の詳細を見る
The change in total surface area, namely fracture surface area, of a carbon fiber-reinforced silicon nitride composite (unnotched specimens) was measured by the BET adsorption technique during loading/unloading tests in three-point bending. The actual fracture energy of unnotched specimens, which had been defined as the ratio of the work done during one cycle of loading/unloading to the fracture surface area, was compared with that of notched specimens reported previously. Changes in fracture surface area and actual fracture energy corresponded to the transition of fracture mechanism during failure, and obviously reflected the difference in the damage process of the specimens with and without notch. The actual fracture energy had a physical meanings close to the effective fracture energy ordinary reported when the main fracture mechanism was the macroscopic crack extension. It was considered that the evaluation of fracture surface area and actual fracture energy was an effective method to investigate fracture behavior of fiber-reinforced ceramic composites.
社団法人日本セラミックス協会の論文
1993-07-01