Method of analysis of multiple excitation dilaton zones stressed mechanically applied material samples to the assessment of the actual mechanical properties of unidirectional fiberglass with high static and dynamic loads. Dynamic properties of the samples are determined according to the scheme 3-point bending strain rate and 7,3.103-1. Tests subjected to glass fiber composites with epoxy-matrix and with variable weight content of filler. Interfacial adhesion characteristics of the samples molded for a single technological regime varied using four different types of coupling agents with functional groups. Test results indicate that the optimum parameters of the static and dynamic properties of fiberglass investigated in all cases virtually identical analysis and highly dependent on the type of the applied coupling agent.