LOEMS

Force, deflection (bending) & crack opening measurement or experimental determination of the intensity of stress, KID and KIC-factor. With ultra high speed (8 channels at 2.5 MHz, one channel 20 MHz) ADC board for data acquisition. Including software package for research purposes.

Patented Laser Opto-Electronic Measuring System

The determination of the factor of intensity of distortion KIC or KID in dynamics requires the measurement of the crack opening displacement (COD) according to the applied force. While the measurement of these two parameters, force and particularly COD, poses no problems under normal test conditions, (ambient T° and slow distortion), it is not the case when the conditions become extreme, as in the case of a shock test with an impact pendulum where the use of a precision extensometer is not possible. In order to measure the distortion during a shock test, an optical method without contact is required, permitting measurement of distortion directly on the specimen during the rupture (test time about 300 ms) not only in the direction of application of the force (deflection) but also in the transversal sense (COD). A high-speed acquisition card (20 MHz, 8 channels) ensures a very precise sampling range.