Deformation and failure of different-scale cylindrical glass-reinforced plastic shells in internal pulsed loading

Criterion for Selecting Composite Materials for Explosion Containment Structures (Review)

“…Thus, experiments with cylindrical fiberglass shells subjected to internal explosive loading both in water [31] and air [34] with a simulation scale of 1 : 9.3 did not reveal considerable scale effects of an energetic nature. As in [31], this can be explained by the constancy of the dimensions of the load-bearing unit (fiberglass diameter) in shells of different diameters, which provides for constancy of the elastic energy taken from the fiberglass volume for fiber failure, irrespective of the shell dimensions and the macromechanism of shell failure.…”

“…The maximum relative deviations of the radius from the average value did not exceed 0.16 (I) and 0.05% (II), and for the thickness, these values were 9 and 1.5%, respectively. From the experimental results of [34] the following conclusions were drawn.…”

“…In the case of a brittle transverse crack moving at a constant rate, the length of this segment is proportional to d; therefore, from (2) substituting L = nd, where n = const and d = const, we obtain σ = const. (1) and maximum rates of wall displacement (2) for shells of various scales versus the relative mass of the explosive charge: points , , , and refer to samples of type I and points •, , •, and to samples of type II; light symbols indicate that the samples that did not fail and dark symbols indicate that the samples that failed (through cracks formed) [34].…”

“…The deformation and failure of geometrically similar free (not filled with water) cylindrical fiberglass cloth shells under single internal explosive loading were studied in [34]. The length of the shells was equal to the four inner radii R, and the wall thickness ratio was δ/R = 6%.…”