DIAGNOSTICS OF THE FIBERGLASS COMPOSITE USED TO MANUFACTURE THE BODY OF A GEOPHYSICAL INSTRUMENT BY INELASTICITY

ALGZIK

Abstract

Increasing the accuracy of the data obtained, the stability of well exploration results, improving the strength properties of the radio-transparent body, and as a result, increasing the service life of the geophysical instrument is impossible without diagnosing the properties of the body material and assessing load levels that can lead to the loss of the material’s load-bearing capacity. The influence of different cyclic loading schemes on the shape and dimensions of the inelastic loop was studied when testing ring-shaped fiberglass samples(0º-90º) made by obliquely longitudinally winding glass fiber based on aluminoborosilicate and magnesium aluminoborosilicate glass. As a result of studying the influence of loading schemes, a change in the shape and loop of inelasticity and a transition from the relaxation type of inelasticity to the hysteresis type of inelasticity due to the accumulation of residual deformations when changing the loading angle from 30º to 45º and increasing the load amplitude were shown. The results of sample destruction under loading schemes are similar to the loading conditions in operation and can be used to evaluate the destruction process.