Mechanical property distribution of CFRP filament wound composites

摘要

The extending use of composite materials and the simultaneous need for reliability-based design of structural component has introduced the stochastic modeling of material properties, as implied by several design codes and standards. Therefore, for using such materials in advanced applications, the stochastic character of their properties need sot be taken into account. In this work the statistical aspects of strength and elastic properties of carbon/epoxy (C/Ep) filament wound composites are determined through a series of static tensile and compressive test. Six candidate statistical distributions were used in order to mode the strength and elastic properties of the composite, but none of them was sported to be a better fit to the experimental results, as revealed by the Komogorov-Smironv test. Thereof, anyone of them can be used equally well to model mechanical property distributions. Although not expected, the experimental investigation revealed considerable scattering on the elasticity, besides strength, indicating that the variation of the elastic properties should be implemented in an adequate reliability analysis.