Strength of short fiber reinforced polymers: Effect of fiber length distribution

Date

2008-06-01

Author

Aykol, Muratahan
Isitman, Nihat Ali
FIRLAR, Emre
Kaynak, Cevdet

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

In this study, the prediction of mechanical strength of short fiber reinforced plastics (SFRPs) is made possible by obtaining a Fiber Length Distribution (FLD) efficiency factor, eta(FLD), from the formerly known twofold discrete strengthening equation of Kelly-Tyson. The unified parameter eta(FLD) is developed involving both the effects of fiber breakage and resulting distribution, fiber volume fraction and fiber and interface properties, so that they can be incorporated into modified rule of mixtures (MROM). This procedure helps to clarify the experimentally observed loss in strengthening rate with increasing fiber fraction. By adapting a few experimentally determined distributions to a Weibull type function, the analytical solutions described in this study establish the exploration of the strength of SFRPs in the entire fiber content range or can reveal the interfacial bond strength. After investigating the effects of fiber and interface parameters on strengthening efficiency, it is found that common fiber-matrix combinations possessing intermediate critical fiber lengths show a significant decrease in strengthening efficiency with increasing fiber content at low fiber loadings. On the contrary, higher and lower critical fiber lengths yield less significant losses.

Subject Keywords

Materials Chemistry, General Chemistry, Polymers and Plastics, Ceramics and Composites

URI

https://hdl.handle.net/11511/35725

Collections

Department of Metallurgical and Materials Engineering, Article