SciELO - Scientific Electronic Library Online

vol.21 issue3Polystyrene cellulose fiber composites: effect of the processing conditions on mechanical and dynamic mechanical properties author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Matéria (Rio de Janeiro)

On-line version ISSN 1517-7076


RABAHI, Ricardo Fouad  and  LEVY NETO, Flaminio. Analysis of the strength of synthetic marble beams through the statistical distribution of Weibull. Matéria (Rio J.) [online]. 2016, vol.21, n.3, pp.542-551. ISSN 1517-7076.

In the present study, the Weibull statistical analysis was adopted for evaluating the flexural strength, as well as its repeatability, of cultured marbles, both pure and reinforced with fiberglass. The objective of this study was to observe the behavior of the Weibull modulus and mechanical strength, as chopped fiberglass was incorporated in the composition of cultured marble. For this purpose, four different compositions with different amounts of glass fiber, by weight, were evaluated, to establish a standard curve of the mechanical behavior of the composite fiber. The Weibull approach enables this analysis since, in addition to the dimensional thickness resemblance of test samples with the products made of synthetic marble, it quantifies the occurrence of imperfections due to the manufacturing process. The results showed that the glass fiber insertion into a mass of 3 kg of synthetic marble, in proportions of 12.5 to 100 grams, caused a variation in the intrinsic resistance, depending on the amount of fiber inserted, which initially fell (0 to25 g) and then increased to a maximum of 100 grams. Another important result was the time of demolding, which strongly influenced the dispersion of the results that, when reduced by 2h to 24h, caused a decrease in Weibull modulus (i.e. increase in the variation of the rupture stress), up to 60%.

Keywords : Synthetic Marble; Fiberglass; Weibull statistics.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )