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 specimens 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 KID, crack velocity a and acceleration a were evaluated in the course of crack propagation to examine the effects of a and a on KID. Results showed that a and a strongly affected the values of KID, and for a constant a the decelerating crack had a larger value of KID than the accelerating or re-accelerating crack. Also, it was found that KID could be expressed as two parametric functions of a and a for epoxy specimens.
|Number of pages||5|
|Journal||Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - 1997|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering