Fabrication of long glass fiber reinforced polyacetal composites: Mechanical performance, microstructures, and isothermal crystallization kinetics

2014 ◽  
Vol 36 (10) ◽  
pp. 1826-1839 ◽  
Author(s):  
Zhaozeng Tao ◽  
Yatao Wang ◽  
Jianhua Li ◽  
Xiaodong Wang ◽  
Dezhen Wu
Keyword(s):  
Glass Fiber ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Mechanical Performance ◽  
Fiber Reinforced ◽  
Isothermal Crystallization Kinetics ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Uncertainty Optimization Design of Vehicle Wheel Made of Long Glass Fiber Reinforced Thermoplastic

2018 ◽  
Author(s):  
Daijun Hu ◽  
Yingchun Shan ◽  
Xiandong Liu ◽  
Weihao Chai ◽  
Xiaoyin Wang
Keyword(s):  
Glass Fiber ◽  
Optimization Design ◽  
Mechanical Performance ◽  
Thermoplastic Composite ◽  
Fiber Reinforced ◽  
Effective Measure ◽  
Glass Fiber Reinforced ◽  
Uncertainty Optimization ◽  
Long Glass Fiber ◽  
Simulation Results

The use of automobile lightweight is an effective measure to reduce energy consumption and vehicle emissions. The utilization of high-performance composite materials is an important way to achieve lightweight vehicles technically. The advantages of using thermoplastic composite wheels are: easy to form, high manufacturing efficiency, low cost and easy to recycle. This leads to broader application prospects. Taking composite anisotropy into consideration, the mechanical performance of a wheel made of long glass fiber reinforced thermoplastic (LGFT), is analysed using the finite element method (FEM). This is done by placing the wheel under a bending fatigue load simulation. According to the simulation results, the sample database is established by orthogonal experimental method on the Isight platform, and the approximate model is established by the Response Surface Methodology (RSM). Based on this model, uncertainty optimization analysis is then conducted on the wheel’s design using Sigma Principle whereby the optimization target is the mass minimization. The maximum deformation of the wheel and the stress on both sides of the spoke will serve as constraint conditions and the key dimension parameters of the wheel model will be taken as the design variables. The uncertainty optimization is based on the Sigma criterion, taking into consideration the wheel’s geometry and property-fluctuation materials. The feasibility of design schemes is then verified after comparison analysis between the optimization results and the simulation results obtained. The result shows that compared with deterministic optimization, though the weight of the wheel has slightly increased, the uncertainty optimization based on the Sigma criterion is much more robust and the reliabilities of the three constraints are all above 6 Sigma. The resulting optimized LGFT wheel weighs 5.28kg, which has a 5.5% more loss in weight than the initial target and is also 25.6% lighter than the counterpart wheel which is made of aluminum alloy. The desired design results is now achieved with this lightweight effect.

scholarly journals Non-Isothermal Crystallization Kinetics of Short Glass Fiber Reinforced Poly (Ether Ether Ketone) Composites

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2094 ◽  
Author(s):  
Xujing Yang ◽  
Yazhuo Wu ◽  
Kai Wei ◽  
Wenjun Fang ◽  
Haofei Sun
Keyword(s):  
Glass Fiber ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Isothermal Crystallization Kinetics ◽  
Short Glass Fiber ◽  
Glass Fiber Reinforced ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Short Glass

Due to its excellent chemical and temperature resistances, short glass fiber reinforced poly (ether ether ketone) composite (SGF/PEEK) is a promising material for application in automotive lightweight. Processing conditions, such as cooling rate, need to be well controlled to obtain the optimal crystallite morphology of PEEK composites. Thus, in this paper, the non-isothermal crystallization kinetics and melting behavior of SGF/PEEK were investigated by differential scanning calorimetry (DSC) at different cooling rates, and the crystallite sizes were evaluated by the X-ray diffraction technique (XRD). Crystallization kinetics models and effective activation energies were evaluated to determine the crystallization parameters of the composites. The results suggest that a lower cooling rate enlarges the size of crystallites and enhances the uniformity of size distribution. The addition of glass fibers improves the nucleation rate owing to heterogeneous nucleation while decreasing the growth rate due to retarded movement of the polymer chain. The combined Avrami-Ozawa equation was shown to describe accurately the non-isothermal crystallization. The absolute value of the crystallization activation energy for SGF/PEEK is lower than that of pure PEEK.

Fabrication and Mechanical Performance of Glass Fiber Reinforced, Three‐phase, Epoxy Syntactic Foam

2022 ◽  
Vol 7 (1) ◽  
Author(s):  
Tao Jiang ◽  
Xinfeng Wu ◽  
Yuan Gao ◽  
Ying Wang ◽  
Ke Yang ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Mechanical Performance ◽  
Syntactic Foam ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Three Phase

Rubber-Toughened Long Glass Fiber Reinforced Thermoplastic Composite

2012 ◽  
Vol 2 (4) ◽  
pp. 47-58
Author(s):  
Fabrizio Quadrini ◽  
Claudia Prosperi ◽  
Loredana Santo
Keyword(s):  
Glass Fiber ◽  
Thermoplastic Composite ◽  
Dissipated Energy ◽  
Powder Size ◽  
Damping Properties ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Rubber Toughened ◽  
Long Glass Fiber ◽  
Rubber Particles

A rubber-toughened thermoplastic composite was produced by alternating long glass fiber reinforced polypropylene prepregs and rubber particles. Several composite laminates were obtained by changing the number of plies, the rubber powder size distribution, and the stacking sequence. Quasi-static mechanical tests (tensile and flexure) and time dependent tests (dynamic mechanical analysis and cyclic flexure) were carried out to evaluate strength and damping properties. As expected, 10 wt% rubber-filled laminates showed lower strengths than rubber-free laminates but the effect of the rubber on the composite damping properties was evident. At low rates, the rubber particles can also double the dissipated energy under cyclic loading, even if this effect disappears by increasing the test rate.

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