Fiber-matrix interactions in aramid-short-fiber-reinforced thermoplastic polyurethane composites

2002 ◽  
Vol 87 (7) ◽  
pp. 1059-1067 ◽  
Author(s):  
Chanthipa Vajrasthira ◽  
Taweechai Amornsakchai ◽  
Sauvarop Bualek-Limcharoen
Keyword(s):  
Thermoplastic Polyurethane ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Matrix Interactions ◽  
Fiber Matrix ◽  
Polyurethane Composites

Fiber-Matrix Interfacial Area Reduction in Fiber Reinforced Cements and Concretes at Moderate to High Fiber Volume Fractions

1994 ◽  
Vol 370 ◽  
Author(s):  
Gebran N. Karam
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Interfacial Area ◽  
Composite Fiber ◽  
Short Fiber ◽  
Published Data ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
High Fiber ◽  
Fiber Matrix

AbstractThe area and properties of the fiber-matrix interface in fiber reinforced cements and concretes determines the amount of stress transferred forth and back between the cement paste and the reinforcement and hence controls the mechanical properties of the composite. Fiber-fiber interaction and overlap of fibers with fibers, voids and aggregates can dramatically decrease the efficiency of the reinforcement by reducing this interfacial area. A simple model to account for this reduction is proposed and ways to integrate it in the models describing the mechanical properties of short fiber reinforced concretes are presented. The parameters of the model are evaluated from previously published data sets and its predictions are found to compare well with experimental observations; for example, it is able to predict the non-linear variation of bending and tensile strength with increasing fiber volume fraction as well as the existence of an optimal fiber content.

scholarly journals Optimization of Processing Parameters and Fiber Content of Cocoa Pod Husk Fiber-Reinforced Thermoplastic Polyurethane Composites by Taguchi Method

2014 ◽  
Vol 564 ◽  
pp. 394-399 ◽  
Author(s):  
Y.A. El-Shekeil ◽  
S.M. Sapuan ◽  
M. Haron
Keyword(s):  
Processing Time ◽  
Thermoplastic Polyurethane ◽  
Processing Parameters ◽  
Fiber Content ◽  
Processing Temperature ◽  
Fiber Reinforced ◽  
Compression Moulding ◽  
Blending Method ◽  
Cocoa Pod Husk ◽  
Polyurethane Composites

A composite of cocoa (Theobroma cacao) pod husk (CPH) fiber reinforced themoplastic polyurethane (TPU) was prepared by melt-blending method followed by compression moulding. Specimens were cut from the sheets that were prepared by compression moulding. The criteria of optimization was testing the specimens by tensile test and comparing the ultimate tensile strength. The aim of this study is to optimize processing parameters and fiber loading using Taguchi approach. These four parameters were investigated in three levels each. The L9 orthogonal array was used based on the number of parameters and levels that have been selected. Furthermore ANOVA was used to determine the significance of parameters. The processing parameters chosen for this study were temperature, speed and time of processing and fiber content. The results showed that optimum values were 190°C, 40 rpm, 11min and 30% for processing temperature, processing speed, processing time and fiber content; respectively. Using ANOVA; fiber content showed the highest significance value followed by processing time. Processing temperature and speed showed no significance in the optimization of TPU/CPH.

Effects of KMnO4 Treatment on the Flexural, Impact, and Thermal Properties of Sugar Palm Fiber-Reinforced Thermoplastic Polyurethane Composites

JOM ◽  
2018 ◽  
Vol 70 (7) ◽  
pp. 1326-1330 ◽  
Author(s):  
A. A. Mohammed ◽  
D. Bachtiar ◽  
M. R. M. Rejab ◽  
X. X. Jiang ◽  
Falak O. Abas ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Thermoplastic Polyurethane ◽  
Fiber Reinforced ◽  
Palm Fiber ◽  
Sugar Palm Fiber ◽  
Polyurethane Composites

Study on Temperature-Dependent Tensile Strength of Short-Fiber-Reinforced Elastomer Matrix Composites

2008 ◽  
Vol 44-46 ◽  
pp. 97-104 ◽  
Author(s):  
D.S. Zhu ◽  
Bo Qin Gu ◽  
Ye Chen
Keyword(s):  
Tensile Strength ◽  
Fiber Length ◽  
Volume Fraction ◽  
Short Fiber ◽  
Tensile Fracture ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Temperature Dependent ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

The temperature-dependent tensile strength is an important indicator used to evaluate combination property of short-fiber-reinforced elastomer matrix composite. Some short-fiber-reinforced elastomer matrix composites are manufactured in the molding preparation process, and the tensile tests of fiber, matrix and the composites are carried out at different temperatures. The fiber length and orientation distributions are statistically analyzed. The influence of temperature on the micromechanical stress distribution and transfer in the composite is investigated, and the thermal stresses in the fiber, matrix and fiber-matrix interface are obtained. Based on the theory of micromechanical stress distribution and transfer of the fibrous composite, the mixture law is modified, and a model for predicting the temperature-dependent tensile strength of this kind of composite is developed. Moreover, the mechanism of the tensile fracture of the composite at various temperatures is discussed. Research indicates that the tensile strength is largely related to the temperature, mechanical performances of the main components of the composite and some microstructural parameters, such as short fiber aspect ratio, volume fraction and orientation distribution. The tensile strength of SFRE decreases with increasing temperature. The tensile strength increases with the increase of fiber length when the fiber length is no larger than critical fiber length. There exists a critical fiber volume fraction where the tensile strength of SFRE reaches the maximum. The tensile fracture of the composite depends largely on the temperature, the bond strength of fiber-matrix interface and the average length of reinforcing short fibers. The temperature-dependent tensile strengths predicted by the presented model are in good agreement with experimental data.

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