Abstract
This study aimed to analyze the mechanical properties and damage characteristics in uniaxial tensile loading of two hybrid composite laminates consisting of an ortho-therephthalic polyester matrix reinforced by bidirectional jute fabrics and E-glass fibers, with different configurations and types of geometric discontinuities in the longitudinal section, characterized by the presence of a circular hole and semicircular notches. A semi-empirical study was conducted using the residual properties obtained in mechanical tests, as well as the Point Stress Criterion (PSC) and Average Stress Criterion (ASC) failure theories. This study is based on the calculation of distances (d0 and a0) in the neighborhood of both the hole and the notches, the area of failure stress. The results show the direct influence of geometric discontinuity and residual and modulus strengths in all the parameters studied. With respect to failure theories, only the PSC showed good agreement when the K equal to 2.36 or 2.58 values was used.
Highlights
An increasingly important area in the field of engineering is the development of new materials aimed at meeting a host of conditions, combining high-performance structural properties with low production and operational costs[1,2,3]
The polyester resin is of industrial use because it has good impregnation and mechanical properties when used in polymeric composites 1
It can be seen that both composite laminates have low densities, which is excellent for applications in lightweight structures
Summary
An increasingly important area in the field of engineering is the development of new materials aimed at meeting a host of conditions, combining high-performance structural properties (lightness, easy handling and high mechanical response) with low production and operational costs[1,2,3]. Natural fibers such as jute fiber composite materials are replacing the sinthetic fibers owing to their easy availability and cost. Jute is an important natural fibre occupying second place in the economic market after the cotton and mainly utilized for industrial application. The nonabrasive nature of jute, which permits higher fibre loading and low rate of damage to the mould is compared with the glass fibre composite quality[5]
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