The Impact of Test Number on the Mechanical Properties of <i>Dracaena Draco</i> Cellulose Fibers for Composite Structures: Weibull Statistic

The production of natural fiber-based composites benefits various industries, including sports equipment, wind turbine blades, building materials, packaging, and medical devices, by enabling more environmentally friendly applications. Using a variety of statistical laws, the mechanical properties of newly generated fibers from the Dracaena draco fiber (DDF) plant are being examined in order to determine how the tests’ number (N) affects the tensile behavior of the fibers. The purpose of this study is to evaluate the quasi-static stress performance of DDF fibers with a gauge length of 40 mm. In order to ascertain the effect of N on the tensile resistance, rupture deformation, and Young’s modulus of 200 DDF fibers, the fibers were tensile tested in seven groups: 30, 60, 90, 120, 150, 180, and 200. The mechanical properties data were statistically analyzed using Weibull and log-normal distributions, as well as their variability was examined and estimated via maximum likelihood and least-squares prediction model with a 95% confidence level.