scholarly journals Influence of Defects on Bending Properties of 2D-T700/E44 Composites Prepared by Improved Compression Molding Process

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2132 ◽  
Author(s):  
Yuqin Ma ◽  
Shuangshuang Li ◽  
Jie Wang ◽  
Luyan Ju ◽  
Xinmei Liu
Keyword(s):  
Composite Materials ◽  
Brittle Fracture ◽  
Process Parameters ◽  
Bending Strength ◽  
Testing Machine ◽  
Compression Molding ◽  
Bending Properties ◽  
Molding Process ◽  
Binding Force ◽  
Resin Impregnation

2D-T700/E44 composite materials were prepared by improved compression molding process (ICM) then microstructure and properties of the composites were analyzed and summarized by scanning electron microscope (SEM) and electronic universal testing machine. It is found that defects will occur when the process parameters are not controlled properly and the main defects of composite materials include inadequate resin impregnation, weak interlaminar binding force, fiber displacement warping, hole and brittle fracture. Moreover, there are significant differences in the infiltration microstructure, bending properties, and fracture morphology of the composite materials with different defects. When the defects of weak interlaminar binding force and brittle fracture occur, bending properties of composite materials are relatively low, and they are 220 MPa and 245 MPa, respectively, which reach 34.9% and 38.9% of the bending strength of composite material whose defects are effectively controlled. When the process parameters are reasonable and the defects of the composite materials are effectively eliminated, the bending strength can reach 630 MPa. This will lay a foundation for the preparation of 2D-T700/E44 composite materials with ideal microstructures and properties by ICM.

Study on Processes and Properties of Continuous Woven Roving Reinforced Polyurethane Composites

2011 ◽  
Vol 306-307 ◽  
pp. 879-883 ◽  
Author(s):  
Xiao Li Dai ◽  
Xiang Wang ◽  
Jun Wang
Keyword(s):  
Mass Fraction ◽  
Interfacial Adhesion ◽  
Bending Strength ◽  
Compression Molding ◽  
Micro Structure ◽  
Molding Process ◽  
Elongation At Break ◽  
Vacuum Infusion ◽  
Polyurethane Composites ◽  
Sem Morphology

E-glass fiber woven roving reinforced polyurethane composites were manufactured by three different processes: hand lay-up, compression molding and vacuum infusion to assess the feasibility of all the processes. The results showed that all composites led to significant improvements in both flexural and tensile properties except elongation at break in comparison with the neat PU. Among the three processes, the best bending strength was exhibited by the hand lay-up process. This is attributed to higher PU mass fraction leads to a better fiber–matrix interfacial adhesion. Mechanical properties of the composite molded by vacuum infusion were superior to that produced by compression molding process. The SEM morphology revealed that vacuum infusion composite had more homogeneous micro- structure.

Optimization of mechanical properties of silk fiber-reinforced polypropylene composite using Box–Behnken experimental design

2016 ◽  
Vol 47 (5) ◽  
pp. 602-621 ◽  
Author(s):  
Rajkumar Govindaraju ◽  
Srinivasan Jagannathan
Keyword(s):  
Mechanical Properties ◽  
Experimental Design ◽  
Process Parameters ◽  
Polypropylene Fiber ◽  
Compression Molding ◽  
Silk Fiber ◽  
Fiber Reinforced ◽  
Polypropylene Composite ◽  
Molding Process ◽  
Polypropylene Composites

In this study, the compression molding process parameters for the development of silk fiber-reinforced polypropylene composites was optimized using Box–Behnken experimental Design with response surface methodology. The trimmed silk fibers from shuttleless loom silk selvedge waste were used as reinforcement in polypropylene fiber matrix. The process parameters of compression molding such as temperature (165–185℃), time (7–15 min) and pressure (35–45 bar) were optimized with respect to the mechanical properties of the silk fiber-reinforced polypropylene composite. The optimum parameters for better mechanical properties were found to be temperature, 180℃; time, 7 min, and pressure, 35 bar in compression molding. The optimised level of parameters has shown good response to the predicted model.

Bending Properties of Four-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials

2012 ◽  
Vol 182-183 ◽  
pp. 89-92
Author(s):  
Liang Sen Liu ◽  
Ye Xiong Qi ◽  
Jia Lu Li
Keyword(s):  
Composite Materials ◽  
Composite Laminates ◽  
Fiber Volume Fraction ◽  
Bending Strength ◽  
Volume Fraction ◽  
Bending Properties ◽  
Fiber Volume ◽  
Reinforced Composite ◽  
Weft Knitted Fabric ◽  
Bending Load

In this paper, a kind of composite laminates whose reinforcement is four-layer biaxial weft knitted (FBWK)fabric made of carbon fiber as inserted yarns has been made. The composite laminates have been impregnated with epoxy resin via resin transfer molding (RTM) technique. The samples of the experiments have been made from the composite laminates. The bending properties of the FBWK fabric reinforced composite materials with different fiber volume fraction have been investigated. The results show that the bending strength of this kind of composites increases with the fiber volume fraction increasing. The bending strength of FBWK reinforced composites with fiber volume fraction of 52% can reach 695.86 MPa. And the relationship between bending load and deflection is obviously linear.

Bending Properties of Five-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials

2011 ◽  
Vol 391-392 ◽  
pp. 359-363 ◽  
Author(s):  
Wei Geng ◽  
Ye Xiong Qi ◽  
Jia Lu Li
Keyword(s):  
Composite Materials ◽  
Fiber Volume Fraction ◽  
Bending Strength ◽  
Volume Fraction ◽  
Test Method ◽  
Bending Test ◽  
Bending Properties ◽  
Fiber Volume ◽  
Reinforced Composite ◽  
Bending Load

Five-layer biaxial weft knitted (FBWK) fabric is one kind of multilayered biaxial weft knitted (MBWK) fabric. FBWK fabric is made of carbon fiber as inserted yarns and stitched with polyester yarns, and it has been impregnated with epoxy via resin transfer molding (RTM) technique to manufacture the composite plates. The bending properties of the FBWK fabric reinforced composite are studied with the three-point bending test method. The bending properties of the FBWK fabric reinforced composite materials with different fiber volume fraction have been investigated. The results show that the relationship between bending load and deflection is obviously linear before reaching the maximum load. Within a certain range, the bending strength of this kind of composites increases with the fiber volume fraction increasing. When the fiber volume fraction is 57%, the bending strength is 1051.4 MPa.

Bending Properties of Three-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials

2011 ◽  
Vol 295-297 ◽  
pp. 1217-1220 ◽  
Author(s):  
Ye Xiong Qi ◽  
Jia Lu Li ◽  
Liang Sen Liu
Keyword(s):  
Composite Materials ◽  
Fiber Volume Fraction ◽  
Bending Strength ◽  
Volume Fraction ◽  
Knitted Fabric ◽  
Bending Properties ◽  
Fiber Volume ◽  
Reinforced Composite ◽  
Weft Knitted Fabric ◽  
Load Deflection Curve

In this paper, three-layer biaxial weft knitted fabric(TBWK) made of carbon fiber as inserted yarns and polyester yarns as knitted yarns , which is a kind of non-crimp fabric, has been impregnated with epoxy via RTM technique. The bending properties of the TBWK fabric reinforced composite materials with different fiber volume fraction have been investigated. The bending strength of TBWK reinforced composites with fiber volume fraction of 48.8% can reach 821.1 MPa. The results show that this kind of composites has good bending properties, and load - deflection curve shows obvious linear features.

scholarly journals Impregnation Behavior and Longitudinal Bending properties of Thermoplastic Composites Made from Commingled Twisted Spun Yarn

1992 ◽  
Vol 1 (3) ◽  
pp. 096369359200100
Author(s):  
Tatsuki Matsuo ◽  
Naoto Ikegawa
Keyword(s):  
Carbon Fiber ◽  
Bending Strength ◽  
Nylon 6 ◽  
Compression Molding ◽  
Lower Pressure ◽  
Thermoplastic Composites ◽  
Fiber Bundles ◽  
Bending Properties ◽  
Spun Yarn ◽  
Longitudinal Bending

Unidirectional composites were fabricated from twisted spun yarn commingled of carbon fiber and Nylon 6 fiber by compression molding. Longitudinal bending strength was saturated with a rather lower pressure and shorter period of compression. A clear fiber bundles- boundaries pattern is observed. Two steps of impregnation is also presumed.

scholarly journals Influence of Compression Molding Process Parameters in Mechanical and Tribological Behavior of Hybrid Polymer Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4195
Author(s):  
Thanikodi Sathish ◽  
Vinayagam Mohanavel ◽  
Thandavamoorthy Raja ◽  
Sinouvassane Djearamane ◽  
Palanivel Velmurugan ◽  
...  
Keyword(s):  
Polymer Matrix ◽  
Process Parameters ◽  
Polymer Matrix Composites ◽  
Natural Fibers ◽  
Compression Molding ◽  
Molding Pressure ◽  
Curing Time ◽  
Hybrid Polymer ◽  
Molding Process ◽  
The Impact

In recent days, natural fibers are extremely influential in numerous applications such as automobile body building, boat construction, civil structure, and packing goods. Intensification of the properties of natural fibers is achieved by blending different natural fibers with resin in a proper mixing ratio. This investigation aims to synthesize a hybrid polymer matrix composite with the use of natural fibers of flax and loops of hemp in the epoxy matrix. The synthesized composites were characterized in terms of tribological and mechanical properties. The Taguchi L16 orthogonal array is employed in the preparation of composite samples as well as analysis and optimization of the synthesis parameters. The optimization of compression molding process parameters has enhanced the results of this investigation. The parameters chosen are percentage of reinforcement (20%, 30%, 40%, and 50%), molding temperature (150 °C, 160 °C, 170 °C, and 180 °C), molding pressure (1 MPa, 2 MPa, 3 MPa, and 4 MPa), and curing time (20 min, 25 min, 30 min, and 35 min). From the analysis, it was observed that the percentage of reinforcement is contributing more to altering the fatigue strength, and the curing time is influenced in the impact and wear analysis.

scholarly journals Performance comparison of four kinds of straw/PLA/PBAT wood plastic composites

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2596-2604 ◽  
Author(s):  
Jianan Feng ◽  
Weixing Zhang ◽  
Lei Wang ◽  
Chunxia He
Keyword(s):  
Thermal Stability ◽  
Composite Materials ◽  
Bending Strength ◽  
Performance Comparison ◽  
Corn Straw ◽  
Polybutylene Terephthalate ◽  
Molding Process ◽  
Initial Decomposition Temperature ◽  
Soybean Straw ◽  
Thermal Stability Of

Utilizing four kinds of straw fibers (sorghum, rice, corn, and soybean) as filling fibers, polylactic acid (PLA) and poly (adipic acid)/polybutylene terephthalate (PBAT) in a mixture (7:3) were used as matrix to prepare composite materials by a hot pressing molding process. The mechanical properties, and thermal stability of the four fiber-filled composites were evaluated. The composites had high interfacial quality and no obvious voids. The soybean straw/PLA/PBAT composite had the best interfacial quality. PLA/PBAT-based composite materials were examined. The experimental results show that the soybean straw/PLA/PBAT composite had the best tensile strength, bending strength, and impact strength (14.3 MPa, 19.5 MPa and 3.23 KJ·m-2, respectively), which was 25.3%, 14.6%, and 27.8% higher than that of the corn straw/PLA/PBAT composite. The thermal stability of the corn straw/PLA/PBAT composite was the best, with an initial decomposition temperature of 286 °C, and the residual amount was 7.3%.

scholarly journals Impregnation Behavior and Transverse Bending properties of Thermoplastic Composites Made from Commingled Twisted Spun Yarn

1992 ◽  
Vol 1 (3) ◽  
pp. 096369359200100
Author(s):  
Tatsuki Matsuo ◽  
Naoto Ikegawa
Keyword(s):  
Carbon Fiber ◽  
Bending Strength ◽  
Nylon 6 ◽  
Compression Molding ◽  
Thermoplastic Composites ◽  
Bending Properties ◽  
Bending Tests ◽  
Unidirectional Composites ◽  
Transverse Bending ◽  
Spun Yarn

Transverse bending tests were carried out for unidirectional composites fabricated from twisted spun yarn commingled of carbon fiber and Nylon 6 fiber by compression molding. Transverse bending strength was explained in conjunction with their impregnation behaviors.

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