形状記憶合金埋込み知的構造材におけるき裂閉鎖機能の評価 (<小特集>インテリジェント材料・流体システム)

概要

論文の詳細を見る
Crack closure in an epoxy resin plate with embedded shape memory (SMA) as an actuator in intelligent structure members is investigated as a function of the length of crack, duration of the supply of electric current to SMA and the volume fraction of SMA under tensile loads using photoelastic experiments. The effect of heat generation due to the SMA in the plate is also investigated. The crack closure is evaluated by the stress intensity factor obtained from photoelastic fringes generated near the crack tip. The results show that the closure strongly depends on the crack length and duration of the current supply. The closure is not found in the plate with a crack which doesn't pass through SMA. A complete cessation of the supply causes the disappearance of the closure with time. Continuous current supply results in change in quality of the epoxy matrix and separation between SMA and the matrix. The intermittent current supply prevents the separation and maintains the closure.
一般社団法人日本機械学会の論文
1997-11-25