Thermal conductivity and expansion of short fibre reinforced polymer composites

2009 ◽  
pp. 184-205
Author(s):  
Shao-Yun Fu ◽  
Bernd Lauke ◽  
Yiu-Wing Mai
Keyword(s):  
Thermal Conductivity ◽  
Polymer Composites ◽  
Short Fibre ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Modelling and testing of ageing of short fibre reinforced polymer composites

2011 ◽  
Vol 226 (1) ◽  
pp. 16-31 ◽  
Author(s):  
A Młyniec ◽  
T Uhl
Keyword(s):  
Polymer Composites ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Experimental Results ◽  
Short Fibre ◽  
Computation Method ◽  
Fibre Alignment ◽  
Reinforced Polymer ◽  
Temperature Ageing ◽  
Fibre Reinforced Polymer

A study in accelerated humidity–temperature ageing and it is numerical modelling for short fibre reinforced polymer composites (SFRPC) based on poly(butylene terephthalate) (PBT) is reported. Authors described experimental results of humidity–temperature ageing of PBT reinforced with glass fibres and proposed a novel computation method of strength and durability analysis for SFRPC parts. Experimental results showed different ageing behaviours, which depend on fibre alignment, e.g. a decrease of Young’s modulus in longitudinal fibre alignment in tension after ageing, an increase of Young’s modulus in transverse direction in tension after ageing, and the increase of the shear modulus and decrease of shear strength after ageing in both directions. Proposed modelling procedure takes the fibre orientation from mould filling analysis as an independent material orientation, using a developed ageing dependent material model, based on tensile, compressive, and shear properties for longitudinal and transverse fibre alignments, and calculates failure criteria as a function of the ageing time and fibre alignment. An innovative approach is to create a fibre alignment dependent material ageing model which takes into account changes of material properties depending on the direction of the reinforcement. This methodology was extended to arbitrary models and validated on real parts made of SFRPC.

Prediction of the Modulus of Elasticity of Short Fibre Reinforced Polymer Composites by Finite Element Modelling

2011 ◽  
Vol 19 (9) ◽  
pp. 733-742 ◽  
Author(s):  
A. El-Sabbagh ◽  
I. Taha ◽  
R. Taha
Keyword(s):  
Finite Element ◽  
Polymer Composites ◽  
Modulus Of Elasticity ◽  
Short Fibre ◽  
Finite Element Models ◽  
Factors Affecting ◽  
Volume Fractions ◽  
Specific Strength ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Recently, there has been increased interest in fibre-reinforced polymer composites, due to their distinctive specific strength, corrosion resistance and fatigue resistance, as well as high damping characteristics. In this paper, finite-element models for the prediction of the modulus of elasticity of short-fibre reinforced composites (SFRC) are introduced. The stiffness of a structure is of principal importance in many engineering applications and the modulus of elasticity is often one of the primary properties considered when selecting a material. In the developed models, different factors affecting the overall performance of such composites are considered. These factors include the respective volume fractions of the polymer matrix and fibrous reinforcement, fibre orientation and agglomeration. Three finite-element models with different sophistication levels are proposed. The models are validated by comparing the effective modulus of elasticity predicted by the different models to experimental results obtained by tensile testing SFRC samples consisting of glass fibres in a polypropylene matrix at different volume fractions.

Sign in / Sign up

Export Citation Format

Share Document