Recycled jute fabric cloth as inner and glass fabric cloth as outer skin layers and the jute mat as a thick core were used as hybrid fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the fabrics in vacuum. The effect of the fiber weight contents (30, 50, 58 wt%) on the tensile and bending properties were investigated and were compared with those of jute mat composites with and without outer skin jute cloth fabrics and the notch sensitivity of these composites was also investigated. These comparisons showed that adding the jute cloth and glass cloth as skin layers has improved the tensile and bending properties with respect to those of jute mat composites. While the notch sensitivity increased by adding jute cloth with respect to the jute mat composites and decreased by adding glass cloth as inner skin layers compared to the jute mat composites with jute cloth as outer skin layers.

In this research, Recycled jute fabric cloth as inner and glass fabric cloth as outer skin layers and the jute mat as a thick core were used as hybrid fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the fabrics in vacuum. The effect of the fiber weight contents (30, 50, 58 wt%) on the tensile and bending properties were investigated and were compared with those of jute mat composites with and without outer skin jute cloth fabrics and the notch sensitivity of these composites was also investigated. These comparisons showed that adding the jute cloth and glass cloth as skin layers has improved the tensile and bending properties with respect to those of jute mat composites. While the notch sensitivity increased by adding jute cloth with respect to the jute mat composites and decreased by adding glass cloth as inner skin layers compared to the jute mat composites with jute cloth as outer skin layers.

In this research, Recycled jute fabric cloth as inner and glass fabric cloth as outer skin layers and the jute mat as a thick core were used as hybrid fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the fabrics in vacuum. The effect of the fiber weight contents (30, 50, 58 wt%) on the tensile and bending properties were investigated and were compared with those of jute mat composites with and without outer skin jute cloth fabrics and the notch sensitivity of these composites was also investigated. These comparisons showed that adding the jute cloth and glass cloth as skin layers has improved the tensile and bending properties with respect to those of jute mat composites. While the notch sensitivity increased by adding jute cloth with respect to the jute mat composites and decreased by adding glass cloth as inner skin layers compared to the jute mat composites with jute cloth as outer skin layers.

Jute fiber mat reinforced unsaturated polyester matrix composites having different fiber weight contents (11, 22, 32 wt%) were fabricated by modifying the hand lay-up technique with resin pre-impregnation into the jute mats in the vacuum. Tension and three-point bending tests were carried out to evaluate the effect of fiber contents on these mechanical properties of above-mentioned composites. The results showed that as the fiber weight content increases, tensile strength and modulus increase and the improvement had occurred at 22 wt% of fiber weight content with respect to that of neat resin. As the fiber weight content increases, flexural strength and modulus increase and the improvement had occurred at 11 and 32 wt% fiber contents for the flexural modulus and strength respectively compared to those of neat resin. Fiber pull out mechanism is the failure mode revealed at the fracture surfaces under tensile loading as well as at tension side of composites under bending loading.

Jute fiber mat reinforced unsaturated polyester matrix composites having different fiber weight contents (11, 22, 32 wt%) were fabricated by modifying the hand lay-up technique with resin pre-impregnation into the jute mats in the vacuum. Tension and three-point bending tests were carried out to evaluate the effect of fiber contents on these mechanical properties of above-mentioned composites. The results showed that as the fiber weight content increases, tensile strength and modulus increase and the improvement had occurred at 22 wt% of fiber weight content with respect to that of neat resin. As the fiber weight content increases, flexural strength and modulus increase and the improvement had occurred at 11 and 32 wt% fiber contents for the flexural modulus and strength respectively compared to those of neat resin. Fiber pull out mechanism is the failure mode revealed at the fracture surfaces under tensile loading as well as at tension side of composites under bending loading.

Recycled jute fabric cloths as skin layers and jute mat as a thick core were used as natural fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the jute in vacuum. The effect of skin jute fabric on the tensile and bending properties of jute mat composites was investigated for different fiber weight contents. Moreover, the notch sensitivity of these composites was also investigated. The results showed that the tensile and flexural properties increased by increasing the fiber weight contents. As well as adding the jute fabric as skins for the jute mat composites has improved the tensile and bending properties with respect to those of jute mat reinforced unsaturated polyester matrix composites, whereas the notch sensitivity of the jute mat composites is lower than that of jute fabric/mat composites. Moreover, the fracture behavior of above-mentioned composites was clarified by SEM analysis.

Recycled jute fabric cloths as skin layers and jute mat as a thick core were used as natural fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the jute in vacuum. The effect of skin jute fabric on the tensile and bending properties of jute mat composites was investigated for different fiber weight contents. Moreover, the notch sensitivity of these composites was also investigated. The results showed that the tensile and flexural properties increased by increasing the fiber weight contents. As well as adding the jute fabric as skins for the jute mat composites has improved the tensile and bending properties with respect to those of jute mat reinforced unsaturated polyester matrix composites, whereas the notch sensitivity of the jute mat composites is lower than that of jute fabric/mat composites. Moreover, the fracture behavior of above-mentioned composites was clarified by SEM analysis.

Recycled jute fabric cloths as skin layers and jute mat as a thick core were used as natural fiber reinforcements for unsaturated polyester matrix composites via modifying the hand lay-up technique with resin pre-impregnation into the jute in vacuum. The effect of skin jute fabric and the fiber weight content on the impact properties and fracture behavior of above-mentioned composites were investigated. The results showed that Izod impact strength increases by increasing the fiber weight content. The total impact energy was increased to about five times for different fiber weight content compared to the value of neat resin and the jute cloth has a slightly effect on the total impact energy compared to the jute mat composites.