Short-term flexural creep behavior and model analysis of a glass-fiber-reinforced thermoplastic composite leaf spring

2011 ◽  
Vol 120 (6) ◽  
pp. 3679-3686 ◽  
Author(s):  
C. Subramanian ◽  
S. Senthilvelan
Keyword(s):  
Glass Fiber ◽  
Creep Behavior ◽  
Model Analysis ◽  
Thermoplastic Composite ◽  
Leaf Spring ◽  
Fiber Reinforced ◽  
Short Term ◽  
Glass Fiber Reinforced ◽  
Flexural Creep

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.

Lightweight design of automotive wheel made of long glass fiber reinforced thermoplastic

2015 ◽  
Vol 230 (10) ◽  
pp. 1634-1643 ◽  
Author(s):  
Wang Xiaoyin ◽  
Liu Xiandong ◽  
Shan Yingchun ◽  
Wan Xiaofei ◽  
Liu Wanghao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Glass Fiber ◽  
Lightweight Design ◽  
Safety Margin ◽  
Thermoplastic Composite ◽  
Strength Analysis ◽  
Analysis Method ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Aiming to the lightweight design of the long glass fiber reinforced thermoplastic (LGFT) composite wheel, this paper constructs the design process and the strength analysis method of long glass fiber reinforced thermoplastic wheel. First, the multi-objective topology optimization under multiple design spaces and multiple loading cases is conducted to obtain the robust structure, where the complicated ribs generated in design spaces are quite distinct from conventional steel or aluminum alloy wheel. The effects of weighting factors of two objectives and three loading cases on the topological results are discussed. And the long glass fiber reinforced thermoplastic wheel including the aluminum alloy insert is also designed in detail based on the concept structure and molding process. The novel metallic insert molded-in is another typical feature of long glass fiber reinforced thermoplastic wheel. Capturing the material anisotropy, the strength performances of long glass fiber reinforced thermoplastic wheel are simulated by using the finite element analysis method. The results show that there is a larger safety margin than the baseline wheel based on the maximum stress failure criterion. The long glass fiber reinforced thermoplastic wheel of 5.59 kg saves 22.3% weight compared to the aluminum alloy baseline. For the increasing requirement of automotive components lightweight design, the method and consideration in this paper may also provide some ways for the design and strength analysis of other carrying structures made of thermoplastic composite.

Fabrication and Flatwise Compression Property of Glass Fiber-Reinforced Polypropylene Corrugated Sandwich Panel

2017 ◽  
Vol 09 (08) ◽  
pp. 1750110 ◽  
Author(s):  
Bing Du ◽  
Li-Ming Chen ◽  
Hao Zhou ◽  
Yong-Guang Guo ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Impact Resistance ◽  
Thermoplastic Composite ◽  
Analytical Prediction ◽  
Fiber Reinforced ◽  
Aluminum Foams ◽  
Compression Property ◽  
Composite Sandwich ◽  
Composite Sandwich Structures ◽  
Glass Fiber Reinforced

Composite sandwich structures with cellular cores have wide application in many fields such as aerospace due to their excellent properties. Thermoplastic composite structure has superior impact resistance and recycling ability compared with conventional thermosetting. The glass fiber-reinforced polypropylene corrugated sandwich panels were fabricated by hot-pressing and hot-melting methods, and the flatwise compression property was experimentally investigated. Numerical simulations by use of ABAQUS VUMAT were subsequently carried out, which captured the main experimental features. The classic buckling theory was used to establish the analytical prediction. Experimental results were used to fit the boundary condition factor between face sheet and corrugated core. The fabricated thermoplastic corrugation has competing compression strength with some metal lattice cores and outperforms the commercial aluminum foams with the same density.

Simulation of a Composite Piezoelectric and Glass Fiber Reinforced Polymer Beam for Adaptive Stiffness Applications

2018 ◽  
Author(s):  
Srinivas Koushik Gundimeda ◽  
Selin Kunc ◽  
John A. Gallagher ◽  
Roselita Fragoudakis
Keyword(s):  
Glass Fiber ◽  
Fiber Orientation ◽  
Fiber Reinforced Polymer ◽  
Leaf Spring ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Spring Suspension ◽  
Piezoelectric Fiber

Glass Fiber Reinforced Polymer (GFRP) beams have shown over a 20% decrease in weight compared to more traditional materials without affecting system performance or fatigue life. These beams are being studied for use in automobile leaf-spring suspension systems to reduce the overall weight of the car therefore increasing fuel efficiency. These systems are subject to large amplitude mechanical vibrations at relatively constant frequencies, making them an ideal location for potential energy scavenging applications. This study analyses the effect on performance of GFRP beams by substituting various composite layers with piezoelectric fiber layers and the results on deflection and stiffness. Maximum deflection and stress in the beam is calculated for varying the piezoelectric fiber layer within the beam. Initial simulations of a simply supported multimorph beam were run in ABAQUS/CAE. The beam was designed with symmetric piezoelectric layers sandwiching a layer of S2-glass fiber reinforced polymer and modeled after traditional mono leaf-spring suspension designs with total dimensions 1480 × 72 × 37 mm3, with 27 mm camber. Both piezoelectric and GFRP layers had the same dimensions and initially were assumed to have non-directional bulk behavior. The loading of the beam was chosen to resemble loading of a leaf spring, corresponding to the stresses required to cycle the leaf at a stress ratio between R = 0.2 and 0.4, common values in heavy-duty suspension fatigue analysis. The maximum stresses accounted for are based on the monotonic load required to set the bottom leaf surface under tension. These results were then used in a fiber orientation optimization algorithm in Matlab. Analysis was conducted on a general stacking sequence [0°/45°]s, and stress distributions for cross ply [0°/90°]s, and angle ply [+45°/−45°]s were examined. Fiber orientation was optimized for both the glass fiber reinforced polymer layer to maximize stiffness, and the piezoelectric fiber layers to simultaneously minimize the effect on stiffness while minimizing deflection. Likewise, these fibers could be activated through the application of electric field to increase or decrease the stiffness of the beam. The optimal fiber orientation was then imported back into the ABAQUS/CAE model for a refined simulation taking into account the effects of fiber orientation on each layer.

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