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Abstract

The elastic modulus of a randomly oriented glass-fliber reinforced plastic (GFRP) after hydrothermal aging was estimated using the finite element method and a damage mechanics model. Fiber-matrix debonding of the hydrothermally aged GFRP was assumed as the internal damage, and then the damage mechanics was introduced to the finite element analysis. The damage angle around the fiber greatly affected the modulus reduction of the aged GFRP and was independent of the damage thickness. The internal damage of the aged GFRP was determined quantitatively by the weight loss due to water immersion, and the modulus of the aged GFRP was calculated by the finite element analysis introducing the damage parameter. The calculated results correspond well to the experimental results, and it was analytically shown that the modulus reduction of the aged GFRP was caused by fiber-matrix debonding.

Keywords

randomly oriented GFRP damage mechanics elastic modulus hydrothermal aging finite element analysis debonding

References

1. Morii, T. , H. Hamada , Z. Maekawa , T. Tanimoto , T. Hiran and K. Kiyosumi . 1993. "Weight Changes of a Randomly Oriented GRP Panel in Hot Water," Composites Science and Technology, 49(3):209-216.

2. Morii, T. , H. Hamada , Z. Maekawa , T. Tanimoto , T. Hirano , K. Kiyosumi and T. Tsujii . 1994. "Weight Changes of the Fibre/Matrix Interface in GRP Panels Immersed in Hot Water," Composites Science and Technology, 50(3):373-380.

3. Morii, T. , H. Hamada , Z. Maekawa , T. Tanimoto , T. Hirano and K. Kiyosumi . 1993. "Relation between Weight Changes and Bending Properties of GFRP Panel Immersed in Hot Water," Polymers and Polymer Composites, 1(1):37-44.

4. Morii, T. , H. Hamada , Z. Maekawa , T. Tanimoto , T. Hirano and K. Kiyosumi . 1993. "Weight Change Mechanism of Randomly Oriented GFRP Panel Immersed in Hot Water," Composite Structures, 25:95-100.

5. Reifsnider, K. L. and G. Carman . 1992. "The Micromechanics of Damage Evolution in Composite Material System," AMD-Vol.150, AD-Vol.32, Damage Mechanics in Composites, ASME, pp. 1-11.

6. Renard, J. and A. Thionnet . 1992. "Meso-Macro Approach to Predict the Damage Evolution of Transverse Cracking in Laminated Composite," AMD-Vol. 150, AD-Vol.32, Damage Mechanics in Composites, ASME, pp. 31-52.

7. Walker, K. P. , A. D. Freed and E. H. Jordan . 1992. "Accuracy of the Generalized Self-Consistent Method in Modeling The Elastic Behavior of Periodic Composites," AMD-Vol. 150, AD-Vol.32, Damage Mechanics in Composites, ASME, pp. 107-131.

8. Ju, J. W. and T. M. Chen . 1992. "Effective Moduli of Elastic Composites Containing Microcracks or Microvoids," AMD-Vol.150, AD-Vol.32, Damage Mechanics in Composites, ASME, pp. 181-190.

9. Gosz, M. , B. Moran and J. D. Achenbach . 1992. "Matrix Cracking in Transversely Loaded Fiber Composites with Compliant Interphases," AMD-Vol.150, AD-Vol.32, Damage Mechanics in Composites, ASME, pp. 133-140.

10.

10. Adams, D. F. 1987. "A Micromechanics Analysis of the Influence of the Interface on the Performance of Polymer-Matrix Composites," J. Reinforced Plastics and Composites, 6(1):66-88.

11.

11. Shen, C. H. and G. S. Springer . 1976. "Moisture Absorption and Desorption of Composite Materials," J. Composite Materials, 10(1):2-20.

Damage Mechanics Modeling and Analysis for a Hydrothermally Aged Composite

Abstract

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