Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Composites Theory and Practice

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Water absorption behavior and its effect on Charpy impact test of jute yarn reinforced polyester composites

Djeghader Djamel, Redjel Bachir

Composites Theory and Practice

2022

R. 22, nr 2

65--71

Plates of bidirectional jute/polyester composite material were manufactured by the contact molding method. These plates were cut to form notched test pieces 80x15x4 mm and immersed in water (1, 10, 30, 90, 180 and 270 days) in order to study the impact behavior of this material. The studied composite exhibited a water saturation limit after an immersion period of approximately 30 days, with Fickian diffusion of water within the material. Williams’ method based on linear elastic fracture mechanics was used to calculate impact toughness GIC, which is due to the intrinsic characteristics of the material.

Fatigue life prediction of glass reinforced composite materials using Weibull distribution

Djeghader Djamel, Redjel Bachir

Composites Theory and Practice

2019

R. 19, nr 3

100-106

Cyclic bending fatigue tests were conducted on randomly oriented short multidirectional glass fiber-reinforced polyester matrices. Standard test specimens were manufactured in rectangles with a volume fraction of 40% glass fibers. The experimental fatigue life results were fitted using S-N curves, which are based on power function equations. S-N curves, which are characterized by important and significant scatter over the lifetime, were correlated using the two-parameter Weibull distribution function to determine the probability of failure and to plot the S-N curves at different reliability levels. These curves are of considerable design value in practical applications of composite materials and predict the sample response at the time of service depending on the degree of reliability.