エポキシ樹脂の動的応力拡大係数に及ぼすき裂速度・加速度効果

概要

論文の詳細を見る
Dynamic crack propagation in epoxy specimens was studied using the method of caustics in combination with a Cranz Schardin high speed camera. Single-edge-cracked tensile speciments were fractured under pin-loading conditions so that cracks could undergo acceleration, deceleration and re acceleration stages in one fracture process. Dynamic stress intensity factor K_<ID>, crack velocity a and acceleration a were evaluated in the course of crack propagation to examine the effects of a and a on K_<ID>, Results showed that a and a strongly affected the values of K_<ID>, and for a constant a the decelerating crack had a larger value of K_<ID> than the accelerating or re-accelerating crack. Also, it was found that K_<ID> could be expressed as two parametric functions of a and a for epoxy specimens.
一般社団法人日本機械学会の論文
1997-01-25