APPARATUS FOR DETERMINING MECHANICAL STRESS IN STRUCTURAL MATERIALS Russian patent published in 2012 - IPC G01N29/04 

FIELD: physics.

SUBSTANCE: apparatus for determining mechanical stress in structural materials has a housing filled with an immersion liquid, an acoustic focusing device in form of a lens which interacts with an ultrasonic transducer, and an information receiving unit with recording sensors, wherein inside the housing, on the side opposite the information receiving unit, there is a fastening element in form of a press for the analysed sample with possibility of generating mechanical stress therein, and an ultrasonic transducer is placed at the butt-end of the analysed sample with possibility of transmitting ultrasonic vibrations along the analysed sample on which a spherical element is mounted, in the direction of the focusing device. On top of the housing there is a removable cover on the inside of which there are adjustable acoustic concave lenses, wherein the information receiving unit is provided with a cone which is mounted on the cover of the housing with possibility of movement and adjusting the distance between the recording sensors.

EFFECT: possibility of determining mechanical stress with higher accuracy, simple design.

4 cl, 4 dwg