The fracture in small dimensions, of thin film structures lying on a creeping underlayer was studied. It was discovered that under cyclic temperatures, cracks could grow in brittle films driven by ratcheting plastic deformation in a metal underlayer. Initially, the film was in a uniform biaxial tensile stress which drove pre-existing flaws to grow into channel cracks in the film. It was found that when the crack tip moved rapidly, the crack wake had a short time to relax, and the stress intensity around the crack tip decreased.
|Original language||English (US)|
|Number of pages||2|
|Journal||American Society of Mechanical Engineers, Materials Division (Publication) MD|
|State||Published - Jan 1 2003|
|Event||2003 ASME International Mechanical Engineering Congress - Washington, DC., United States|
Duration: Nov 15 2003 → Nov 21 2003
All Science Journal Classification (ASJC) codes