Dynamic Fracture Analysis by Moire Interferometry.

摘要

Dynamic moire interferometry was used to measure separately the u- and v-displacement fields surrounding a rapidly propagating crack tip in Homalite-100 and 7075-T6 aluminum alloy plates. This transient crack tip displacement data was then used to compute the dynamic stress intensity factor and the remote stress component. J-integral values was also estimated using the static approximate procedure. This static analysis provided the correct J when the contour integral was taken within 3 mm of the crack tip. (jhd)