A mathematical model of the process of hydraulic extrusion of a composite fiber material in a sheath

1990 ◽  
Vol 29 (6) ◽  
pp. 436-439
Author(s):  
V. G. Synkov ◽  
O. E. Glauberman ◽  
Ya. E. Beigel'zimer ◽  
S. G. Synkov
Keyword(s):  
Mathematical Model ◽  
Fiber Material ◽  
Composite Fiber ◽  
Composite Fiber Material ◽  
Hydraulic Extrusion

The air permeability of composite fiber material

2021 ◽  
Vol 1 ◽  
pp. 42-48
Author(s):  
T. A. Leshchenko ◽  
◽  
N. V. Chernousova ◽  
A. V. Dedov ◽  
◽  
...  
Keyword(s):  
Composite Materials ◽  
Permeability Coefficient ◽  
Pore Space ◽  
Fiber Material ◽  
Composite Fiber ◽  
Air Permeability ◽  
Rubber Content ◽  
Limited Mobility ◽  
Fibrous Matrix ◽  
Composite Fiber Material

The air permeability of composite materials obtained by impregnating a non-woven needle-punched cloth with latex was investigated. The permeability of composite materials with different rubber content was estimated by the coefficient of air permeability at a pressure drop of 49 and 100 Pa. The dependence of the air permeability coefficient on the degree of impregnation of the fabric showed that at 15 – 20 % of the rubber content, the maximum air permeability coefficient is observed, and when the degree of impregnation increases, the air permeability coefficient decreases. The process of forming a porous structure of composite materials and its influence on air transport is considered. The increase of the coefficient of permeability is explained by the fixation of the fibers of the surface layer with limited mobility under the action of air flow, and a reduction in the coefficient of air permeability by reducing pore space and an increase in fiber matrix composite materials in the process of sushi-Ki-impregnated material. The air permeability of composite materials is determined by the ratio between the processes of increasing the volume of the fibrous matrix and reducing porosity when filling the space between the portages with rubber particles. A model is proposed for calculating the coefficient of breathability of composite materials of known density.

scholarly journals Effective concrete types with carbon fiber

2018 ◽  
Vol 193 ◽  
pp. 03049
Author(s):  
Vadim Solov'ev ◽  
Marsel’ Nurtdinov ◽  
Il’ya Kukhar
Keyword(s):  
Carbon Fiber ◽  
Fiber Material ◽  
Composite Fiber ◽  
Chemical Processes ◽  
Water Soluble ◽  
Fiber Reinforced Concrete ◽  
Optimal Method ◽  
Combined Application ◽  
Composite Fiber Material ◽  
Positive Effect

The research was conducted in order to determine the effect of the polymer additive on the adhesion between the fiber and the cement-sand matrix, since the involvement stage of the composite fiber material directly depends on the adhesion value between these dissimilar components. Throughout the study, the issue at stake was to determine the optimal method for adhesion increasing to assess its effectiveness, and also to carry out an experiment and obtain actual numerical change values of the adhesion to carbon fiber (the assessment was made considering changes of the strength parameters). According to the results of conducted testings, the tensile strength during the bend almost wasn’t affected in resin-injected samples with the amount of fiber of 1 and 3% (increments of 12.7 and 15.7%, respectively). Despite this, the combined application of a resin with the same amount of fiber gave the increments of 34 and 20%, respectively. Conclusions are drawn about the prospects of polymer additives usage in carbon fiber reinforced concrete. The mechanism of increasing the carbon fiber involvement in the composite behavior is considered, the positive effect is confirmed by the study of the chemical processes that arise during the interaction of fiber and water-soluble resin.

Air Permeability of Composite Fiber Material

2021 ◽  
Vol 12 (5) ◽  
pp. 1214-1218
Author(s):  
T. A. Leshchenko ◽  
N. V. Chernousova ◽  
A. V. Dedov
Keyword(s):  
Fiber Material ◽  
Composite Fiber ◽  
Air Permeability ◽  
Composite Fiber Material

Near-infrared-responsive gold nanorod/liquid crystalline elastomer composites prepared by sequential thiol-click chemistry

2015 ◽  
Vol 51 (60) ◽  
pp. 12126-12129 ◽  
Author(s):  
Hong Yang ◽  
Jian-Jian Liu ◽  
Zhi-Fei Wang ◽  
Ling-Xiang Guo ◽  
Patrick Keller ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
Fiber Material ◽  
Composite Fiber ◽  
Gold Nanorod ◽  
Loading Level ◽  
Composite Fiber Material ◽  
Elastomer Composites

A novel NIR-responsive GNR/LCE composite fiber material with a very low Au loading-level (0.09 wt%) is prepared by a three-step sequential thiol-click chemistry approach.

scholarly journals Damage Identification on Impact and Lightning Damage of Flax Composite Laminates (Linum usitatissimum) Using Long-Pulse Thermography of a Low-Resolution Infrared Camera

2021 ◽  
Vol 8 ◽  
Author(s):  
Murniwati Anwar ◽  
Faizal Mustapha ◽  
Mohamed Thariq H. Sultan ◽  
Izhal A. Halin ◽  
Mohd N. Abdullah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Laminates ◽  
Damage Identification ◽  
Infrared Camera ◽  
Fiber Material ◽  
Composite Fiber ◽  
Low Resolution ◽  
Pulse Thermography ◽  
Strength And Stiffness ◽  
Long Pulse

The demand for composite fiber material is significantly high due to its excellent mechanical properties and its use in various industries. Recently, with the increasing awareness of environmental issues, researchers are now focusing more on eco-friendly and green materials. A biocomposite offers a good balance of strength and stiffness ratio, bending and membrane mechanical properties, balanced thermal distortion stability, reduced weight and cost, improved fatigue resistance, reduced notch sensitivity, and, comparatively, better performance than synthetic composites. Yet, due to the complex anisotropy of the composite material, the inspection and detection of inner defects become a challenge. Long-pulse thermography is one of the non-destructive evaluations (NDEs) used to detect defects in composite materials. However, very limited research has been carried out on the usage of a low-resolution infrared camera to perform defect or damage inspection on flax composite laminates. In this paper, an experimental setup of a long pulse thermography system using low-resolution infrared camera was performed on flax bio-composite to identify impact and lightning damage. The result highlights that with control parameters, a low-resolution infrared camera has the capability to capture the lightning and impact defects of flax biocomposites using the long-pulse thermography system. An image processing method is then applied to the defect to improve the quality of defect detection and reduce background noise.

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