Measurement of Strength and Fracture Load of Weathered Samples of Polymer Composite Materials

The aging of a series of aviation fiberglass and carbon fiber reinforced plastics based on epoxy binders after three years of exposure in different climatic zones was studied in terms of changes in compressive and bending strength limits. It has been shown that the destruction of the surface layer of exposed samples reduces the accuracy of measuring their thickness and significantly increases the scatter of the measured parameters. The variation coefficients of strength indicators and fracture loads are compared for the studied materials.