Fatigue life of thermoset composite materials

Abstract

This article deals with the lifetime of laminated materials produced by different production technologies (hand lamination technology, vacuum bagging technology and prepreg technology with curing in the oven) during cyclic repeated bending stress. Like tested materials composite systems were chosen composite systems with epoxy matrix and carbon reinforcement (Kordcarbon CC200T, epoxy resin with trade name L285) and second composite epoxy system with glass reinforcement (Quadra-axial glass fabric, named Saertex Q-E-820, epoxy resin Biresin CR 82 and third prepreg systems (unidirectional prepreg, trade name Deltapreg VV430U-DT860W-39% and prepreg system with glass fabric VV320P_DT806R-37%). Fatigue tests were performed by cyclic bending loads during a three-point arrangement on a universal servo-hydraulic testing machine INSTRON 8871. Experimentally the number of cycles fracture of the material was determined at 90 % and 80 % of the maximum breaking load.

Comparative FEM Analysis of Vacuum and Perlite Insulation Techniques on the Structural Integrity of Independent Type C Liquefied Natural Gas Tank

“…They concluded that during the high-load application, the damage tends to be dominated by fiber properties, while during low-applied load, the damage is dominated by matrix properties. Another test of glass-reinforced thermoset was carried out by Zaludek et al [26], in which the thermoset was subjected to a bending load corresponding to 80% of its tensile strength. Studies have shown that glass-reinforced plastic can withstand a considerable number of cycles, namely more than 30,000 cycles, even at such a high load.…”

The Advantages and Challenges of Carbon Fiber Reinforced Polymers for Tidal Current Turbine Systems - An Overview

“…Figure 5. Comparison of the fatigue behavior of composites (left)[44] and failure diagram of carbon fiber-epoxy with regard to water content (right)[45] …”