Sage Journals: Discover world-class research

Abstract

Due to Thermal Expansion Coefficient (TEC) mismatch between the fiber and matrix, thermal stresses can appear during cooling from the processing temperature to room temperature. In this paper, we (1) analyze experimentally the effect of coating on the TEC of fiber composite and (2) present a thermal self-consistent model to predict thermal stresses and TEC in multi-coated fiber. Over a large range of temperature (40°C to 200°C), the experimental results show several interesting features that result from the presence of (Silane and Polyvinylacetate) coating. These results are then modeled theoretically using the proposed thermal self-consistent model. The results show that variations in thermal stress may initiate damage in the vicinity of the fiber or promote interface contact during curing of the composite.

Keywords

thermo-elasticity thermal stress thermal expansion coefficients interphase multi-coating fiber composite

Get full access to this article

View all access options for this article.

References

1. Koufopoulos T. , Theocaris P. S. , 1969. "Shrinkage Stresses in Two-Phase Materials," J. Comp. Mat., 3:308-320.

2. Theocaris P. S. , Paipetis S. A. , 1973. "Thermal Crazing of Hot-Setting Plasticized Epoxy Polymers," Fiber Sci. and Techn., 6(2):64-75.

3. Agbossou A. , Cohen I. , Muller D. , 1995. "Effects of Interphase and Impact Strain Rates on Tensile Off-Axis Behaviour of Unidirectional Glass Fibre Composite: Experimental Results," Engin. Fract. Mech., 52(5):923-935.

4. Theocaris P. S. , 1987. The Mesophase Concept in Composites. ed. Springer-Verlag .

5. Christensen R. M. , Lo R. H. , 1979. "Solutions for Effective Shear Properties in Three Phase Sphere and Cylinder Models," J. of Mech. and Phys. of Solids, 27:315-330.

6. Kerner E. H. , 1956. "The Elastic and Thermo-Elastic Properties of Composite Media," Proc. Phys. Soc. London B, 6:808-813.

7. Mal A. K. , Singh S. J. , 1991. Deformation of Elastic Solids, Prentice Hall, Englewood Cliffs, NJ.

8. Pagano N. J. , Tandon G. P. , 1988. "Elastic of Multi-Directional Coated-Fiber Composites," Comp. Sc. and Techn., 31:273-293.

9. Hervé E. , Zaoui A. , 1995. "Elastic Behaviour of Multiply Coated Fibre-Reinforced Composites," Int. J. Eng. Sci., 33(10):1419-1433.

10.

10. Agbossou A. , Pastor J. , 1997. "Thermal Stresses and Thermal Expansion Coefficients of n-Layered Fiber-Reinforced Composites," Comp. Sc. and Techn. 57:249-260.

11.

11. Hashin Z. , Rosen, B. W. , 1964. "The Elastic Moduli of Fiber-Reinforced Materials," J. of Appl. Mech., pp. 223-232.

12.

12. Schapery R. A. , 1967. "Stress Analysis of Viscoelastic Composite Materials," J. Comp Mat., 1:228.

13.

13. Mandel J. , 1966. Mécanique des Milieux Continus, Gauthier-Villars, Paris.

14.

14. Agbossou A. , 1995. "An Approximate Method for the Determination of Poisson's Complex Ratio in Harmonic Viscoelastic Behavior," Pol. Comp., 16:135-143.

Modelling and Experimental Analysis of Multi-Coating Effect on Thermal Expansion and Thermal Stresses of Polymer Fiber-Reinforced Composites

Abstract

Keywords

Get full access to this article

References