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Materiale Plastice
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Materiale Plastice (Mater. Plast.), Year 2009, Volume 46, Issue 2,





Dumitru Bolcu, Marius Marinel Stănescu, Ion Ciuca, Octavian Trante, BAYER MIHAI New Relations for the Calculus of Elastical and Mechanical Characteristics of Polyester Composites Reinforced with Randomly Dispersed Fibers


Abstract:
Using the linearity of the term we will deduce a new formula for the calculus of the fracture strength for composites with randomly dispersed fibres. This formula will depend on the reinforcement volume fraction. Using the mean values for longitudinal and/or transversal modulus, with respect to the rotated reference system, we will obtain an original relation for the calculation of the elasticity modulus for composite plates with a randomly dispersed reinforcement. We preferred to write this relation in a similar manner to the one used for the failure strength, using the linearity related to . Experimental determinations were made for three sets of samples obtained from composite plates with various mass fractions of reinforcement, confirming thus the theoretical results obtained by the authors. Keywords: composite materials, fracture strength, longitudinal/transverse modulus



Issue: 2009 Volume 46, Issue 2
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