The method of caustics in combination with a Cranz-Schardin high-speed camera was utilized to study dynamic crack propagation in epoxy specimens. Single-edge-cracked tensile specimens were fractured under pin-loading conditions so that cracks could undergo acceleration and deceleration stages in one fracture process. Dynamic stress intensity factor Kid and crack velocity a were evaluated in the course of crack propagation. Caustic patterns at the loading points were also recorded to estimate the dynamic load P applied to the specimen. Unloading rate i. e. the time derivative of P, was determined as a function of time t, and its correlations with A'id and a were examined.
|Number of pages||5|
|Journal||Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - 1998|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering