device for the control of cracks in hochtemperatursystemen

摘要

An apparatus for monitoring the growth of surface cracks in materials includes a servo-hydraulic test machine which applies a load to a specimen according to a predetermined loading regime designed to induce crack growth in the specimen, a UV laser for illuminating the specimen with a light having a frequency greater than the frequency of incandescent light, a UV video camera and a two dimensional image computer. Optionally, the two dimensional imagine computer can be used to control the servo-hydraulic test machine. IMAGE