Abstract
The mechanical properties of Sheet Moulding Composite (SMC) have been analyzed by means of static and fatigue tests in tension. SMCs show a substantial in-plane anisotropy either in terms of stiffness or strength. Fatigue data were modeled adopting a fatigue model with two parameters, represented by the cyclic number and the mean stress. The statistical implementation of such model was based on the hypothesis that the monotonic tensile strength follows a twoparameter Weibull distribution. The model has the potential to be predictive indicating that the fatigue characterization of a given laminate can be achieved with a minimum number of experimental tests. The reliability of such procedure and its applicability limits are discussed in the light of the model parameters obtained for different glass fiber reinforced composites.
Highlights
Sheet Moulding Composite (SMC) represents a mixture of the subsequent components: polymer resin, fiber reinforcement, inert fillers, pigments, catalysts, release agents, stabilizers, and thickeners exactly as other thermosets
SMC is a composite material that is being used in several industrial applications; thanks to its aesthetic and mechanical properties it can be employed in the manufacturing of many components in a wide range of industrial fields: building constructions, electrical/ electronics, transportation, aerospace, chemical engineering, and the marine industry
The chopped glass fibers, that compose SMC, have a length ranging from 25 to 50 mm put in a thermosetting resin matrix system
Summary
SMC represents a mixture of the subsequent components: polymer resin, fiber reinforcement, inert fillers, pigments, catalysts, release agents, stabilizers, and thickeners exactly as other thermosets. The static strength data are modeled on the basis of a two parameters Weibull distribution while for the fatigue data a model widely used in literature for glass fiber reinforced composite was adopted [9-12, 14].
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