Tensile and Bending Properties of Jute Fiber Mat Reinforced Unsaturated Polyester Matrix Composites

2011 ◽  
Author(s):  
E. A. Elbadry ◽  
M. S. Aly-Hassan ◽  
H. Hamada
Keyword(s):  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Jute Fiber ◽  
Matrix Composites ◽  
Neat Resin ◽  
Three Point Bending ◽  
Pull Out ◽  
Weight Content ◽  
Polyester Matrix ◽  
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.

Jute Fiber Reinforced Polymeric Composites With Flexible Interphase

2012 ◽  
Author(s):  
Tetsushi Koshino ◽  
Mohamed S. Aly-Hassan ◽  
Hiroyuki Hamada
Keyword(s):  
Unsaturated Polyester ◽  
Weight Ratio ◽  
Matrix Cracking ◽  
Jute Fiber ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Jute Fibers ◽  
Jute Cloth ◽  
Polyester Matrix ◽  
The Impact

In this research, the flexible interphase concept was introduced to enhance the poor mechanical properties of jute fiber reinforced unsaturated polyester matrix composites. The jute cloth reinforcement was obtained from recycled coffee bags. These jute cloths after washing by water and drying were soaked in mixture of Polybutadiene Epoxydied as flexible resin and acetone for 10 seconds. Several mixtures consist of 0, 2, 3.5, 5 and 8 wt% of Polybutadiene Epoxydied and 100, 98, 96.5, 95 and 92 wt% of acetone, respectively, to form flexible interface around the jute fibers. Jute cloth reinforced unsaturated polyester matrix composites with different flexible interphase incremental weight ((Wa-Wb)/Wb) ratios were fabricated by hand lay-up method and examined by a series of mechanical tests. The mechanical testing including tensile, bending, Izod strength impact and drop impact was carried out for these composites to evaluate the effect of the flexible interphase and acetone on the jute cloth composites. The flexible interphase succeed to control the mechanical properties of jute fiber reinforced unsaturated polyester matrix composites. Inserting flexible interphase between unsaturated polyester matrix and jute fibers leads to smooth fluctuation, less matrix cracking, in the second part after the knee point of each stress-strain curve as exhibited in composites with higher flexible interphase incremental weight ratio. This means not only the brittle matrix but also interface/interphase dominates the multiple matrix cracking behavior in jute cloth reinforced unsaturated polyester matrix composites. Inserting flexible interphase between unsaturated polyester matrix and jute fibers leads to less number of multiple cracking as shown in the second portion of flexural stress-displacement curve. This means the number of multiple cracking are dominated by flexible interphase. The impact strength of jute cloth reinforced unsaturated polyester matrix composites with flexible interphase incremental weight ratio of 1.2% is higher than that of jute cloth reinforced unsaturated polyester matrix composites without flexible interphase by about 45%. The impact energy after maximum load has increased significantly with all flexible interphase incremental weight ratios.

Interfacial behaviour from pull-out tests of steel and aluminium fibres in unsaturated polyester matrix

2017 ◽  
Vol 52 (24) ◽  
pp. 13829-13840 ◽  
Author(s):  
Moez Frikha ◽  
Hedi Nouri ◽  
Sofiane Guessasma ◽  
Frederic Roger ◽  
Chedly Bradai
Keyword(s):  
Unsaturated Polyester ◽  
Pull Out ◽  
Interfacial Behaviour ◽  
Polyester Matrix

Mechanical properties of jute fiber–reinforced UP/PU hybrid network composites

2019 ◽  
Vol 27 (9) ◽  
pp. 546-556 ◽  
Author(s):  
Richa Singh ◽  
B Singh ◽  
Hina Tarannum
Keyword(s):  
Mechanical Properties ◽  
Unsaturated Polyester ◽  
Fiber Surface ◽  
Mechanical Analysis ◽  
Hybrid Networks ◽  
Hybrid Network ◽  
Matrix Composites ◽  
Scanning Calorimetry ◽  
Jute Fibers ◽  
Polyester Matrix

Hybrid networks (unsaturated polyester–polyurethane (UP/PU)) of UP resin and PU prepolymer were synthesized and characterized for their phase miscibility with the help of Fourier transform infrared spectroscopy, differential scanning calorimetry, dynamic mechanical analysis (DMA), and atomic force microscopy. The existence of hydrogen bonded –NH groups, broadened glass transition region, and reduced phase domains evidenced the formation of intermixed phase when compared with the parent UP. The optimum mechanical properties of UP/PU hybrid networks were observed at ∼5 wt% PU content. The composites made from treated jute fibers and UP/PU hybrid networks were evaluated for their physico-mechanical properties. DMA curves showed that UP/PU matrix composites had ∼20% higher storage modulus and ∼17% lower tan δ than the polyester matrix composites. The tensile and flexural strengths of these composites were increased by ∼13% and ∼40%, respectively. During accelerated aging, the UP/PU matrix composites retained ∼15% more tensile strength than the polyester matrix composites. Fractographic evidence, such as resin adherence onto the pullout fiber surface, fiber breakage, and adequate adhesion between the jute fibers and the resin, supported the superior properties of UP/PU matrix composites to polyester matrix composites.

scholarly journals Mechanical Behavior Modelling and Filler Geometry Effect of Glass Filler Reinforced Starch-Epoxy Hybrid Matrix Composites

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6587
Author(s):  
Lykourgos C. Kontaxis ◽  
Foteini K. Kozaniti ◽  
George C. Papanicolaou
Keyword(s):  
Mechanical Behavior ◽  
Glass Fibers ◽  
Flexural Modulus ◽  
Glass Beads ◽  
Simultaneous Increase ◽  
Matrix Composites ◽  
Static Properties ◽  
Three Point Bending ◽  
Hybrid Matrix ◽  
Experimental Findings

The aim of the present study is to investigate the inclusion geometry and concentration effect on the quasi-static properties of a starch-epoxy hybrid matrix composite. The composites investigated consisted of a starch-epoxy hybrid matrix reinforced with four different glass inclusions such as 3 mm long chopped strands, 0.2 mm long short glass fibers, glass beads (120 μm in diameter) and glass bubbles (65 μm in diameter) at different concentrations. The flexural modulus and the strength of all materials tested were determined using three-point bending tests. The Property Prediction Model (PPM) was applied to predict the experimental findings. The model predicted remarkably well the mechanical behavior of all the materials manufactured and tested. The maximum value of the flexural modulus in the case of the 3 mm long chopped strands was found to be 75% greater than the modulus of the hybrid matrix. Furthermore, adding glass beads in the hybrid matrix led to a simultaneous increase in both the flexural modulus and the strength.

A new assessment on mechanical properties of jute fiber mat with egg shell powder/nanoclay-reinforced polyester matrix composites

2018 ◽  
Vol 17 (4) ◽  
pp. 482-490 ◽  
Author(s):  
K. Ganesan ◽  
C. Kailasanathan ◽  
M. R. Sanjay ◽  
P. Senthamaraikannan ◽  
S. S. Saravanakumar
Keyword(s):  
Mechanical Properties ◽  
Jute Fiber ◽  
Matrix Composites ◽  
Polyester Matrix ◽  
Egg Shell ◽  
Shell Powder

scholarly journals Effect of Fabric Count and Weave Design on the Properties of Hybrid Fabric Kenaf-Carbon Reinforced Laminated Epoxy Composites

2018 ◽  
Author(s):  
Aisyah Humaira Alias ◽  
Paridah Md Tahir ◽  
Khalina Abdan ◽  
Mohd Sapuan Salit ◽  
Md Saidin Wahab ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Matrix Effects ◽  
Flexural Modulus ◽  
Woven Fabric ◽  
Morphological Properties ◽  
Adhesion Properties ◽  
Pull Out ◽  
Weight Content ◽  
Hybrid Fabric ◽  
Woven Kenaf

Hybrid woven kenaf-carbon composite were fabricated in this study using epoxy resin as matrix. Effects of different fabric material namely weave designs (plain and satin) and fabric counts (5×5 and 6×6) on the properties of laminated woven kenaf polymer composite were evaluated. This study evaluates the mechanical and morphological properties of hybrid fabric kenaf-carbon from kenaf yarn of 500tex. Kenaf and carbon fabrics were used in this work, where vacuum infusion technique was selected to prepare the composite and epoxy resin was used as a matrix. The fibre weight content is 30% and four specimens were prepared for each samples and tested for their tensile, flexural, and impact strengths. The morphological properties of composites were analysed through the scanning electron microscope (SEM). The results revealed that plain woven fabric is favourable in terms of tensile and impact strengths compared to satin woven fabric. Meanwhile, 5×5 of fabric count gives better flexural modulus than composite fabricated with 6×6 fabric count. The morphologies of the fractured surface investigated by SEM demonstrated better adhesion properties and less fibre pull-out on plain woven fabric.

Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites

2001 ◽  
Vol 703 ◽  
Author(s):  
A. Baran Inceoglu ◽  
Ulku Yilmazer
Keyword(s):  
Mechanical Properties ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Clay Content ◽  
Interlayer Spacing ◽  
Modified Clay ◽  
Organically Modified ◽  
Polyester Matrix ◽  
Xrd Patterns

ABSTRACTNanocomposites composed of unsaturated polyester matrix and organically modified clay filler were prepared. After the synthesis, XRD patterns showed that the interlayer spacing expanded from 1.25 nm to 4.5 nm. The mechanical properties of the nanocomposites were determined and it was found that adding only 3 w/w % organically modified clay improved the flexural modulus of unsaturated polyester by 35%. From DSC diagrams, it was found that Tgvalues of the nanocomposites also increased with the clay content. It is concluded that partially exfoliated / intercalated nanocomposites were formed at relatively low clay contents.

Discrete element method to model cracking for two layer systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 101-108
Author(s):  
Daniel Varney ◽  
Douglas Bousfield
Keyword(s):  
Discrete Element Method ◽  
Flexural Modulus ◽  
Single Layer ◽  
Discrete Element ◽  
Flexural Stress ◽  
Layer System ◽  
Three Point Bending ◽  
Moving Force ◽  
Coating Layers ◽  
Element Method

Cracking at the fold is a serious issue for many grades of coated paper and coated board. Some recent work has suggested methods to minimize this problem by using two or more coating layers of different properties. A discrete element method (DEM) has been used to model deformation events for single layer coating systems such as in-plain and out-of-plain tension, three-point bending, and a novel moving force picking simulation, but nothing has been reported related to multiple coating layers. In this paper, a DEM model has been expanded to predict the three-point bending response of a two-layer system. The main factors evaluated include the use of different binder systems in each layer and the ratio of the bottom and top layer weights. As in the past, the properties of the binder and the binder concentration are input parameters. The model can predict crack formation that is a function of these two sets of factors. In addition, the model can predict the flexural modulus, the maximum flexural stress, and the strain-at-failure. The predictions are qualitatively compared with experimental results reported in the literature.

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