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The statistical strength distribution functions of glass monofilaments of various composition are considered. On the basis of the experimental data it is shown that the fiber strength distributions can be described by a three-parameter function of the Weibull type.

The debonding of wound glass-reinforced plastics is examined from the statistical standpoint. The statistical stress intensity distribution function characterizing the fracture toughness is obtained. The effect of defect size on the critical nominal stresses is discussed.

The effect of strain rate on the interval from 8.3·10−4 to 8.3·10−6 sec−1 on the fracture-toughness characteristics of 27–63S unidirectional glass laminate is considered. It is shown that the strain-rate effect can be described in the same way as the time dependence of the strength.