Crack branching in epoxy (Araldite D) was studied by the method of caustics in combination with high-speed photography. Conditions for crack branching were examined using values such as crack velocity ab and crack extension resistance R∗b at the onset of crack branching. No characteristic critical values could be defined for R∗b or ab alone. Instead, it is found that the product R∗b.ab, i. e., dissipated energy per unit crack front and unit time, becomes constant when the crack branching occurs, and that the faster the crack, the larger the number of successful branches.
|Number of pages||5|
|Journal||Transactions of the Japan Society of Mechanical Engineers Series A|
|Publication status||Published - Jan 1 1988|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering