DEVELOPMENT OF RESEARCH METHODICS OF CONTACT ZONES BETWEEN THREADS IN WOVEN FRAMES OF FIRE FIGHTING SLEEVES

Аннотация

n previous studies, the authors showed that the magnitude of the internal burst pressure
in fire pressure hoses is influenced, among other parameters, by parameters such as vertical buckling coefficients, coefficients characterizing the lengths of contact zones between the threads in fractions of the diameters of the warp and weft threads. Accounting for these parameters is necessary for a more accurate determination of the bursting internal hydraulic pressure in fire pressure hoses, which is one of the most important strength parameters of the latter. Fabrics reinforcing frames of fire pressure hoses are technical fabrics, working in very tense conditions. The method of experimental studies of the contact zones between the threads in woven reinforcing frames of fire pressure hoses using a JSM-6490LV scanning electron microscope and statistical methods on the base of which coefficients of vertical thread crushing, coefficient characterizing length of contact zones between the threads in fractions of the diameters of the warp and weft threads.