Conference proceeding
Dynamic mechanical behavior of Kevlar fiber reinforced composites
Materials challenge diversification and the future; Proceedings of the 40th International SAMPE Symposium and Exhibition, Anaheim, CA; UNITED STATES; 8-11 May 1995, pp.711-724
01 May 1995
Abstract
The dynamic mechanical behavior of Kevlar composites over a wide range of frequencies was determined by generating the master curves of both flexural storage modulus and damping loss factor using the frequency-temperature superposition principle. The effects of reinforcements, fiber orientation, and fiber volume fraction were examined on Kevlar 29 and Kevlar KM2 composites with epoxy matrix. At high frequency range (10 exp 5 Hz or higher), no significant differences in dynamic mechanical behavior between Kevlar 29 and KM2 composites were observed. However, at low frequency range (10 exp -10 to 10 exp -8 Hz), the damping factor of KM2 composite was double that of Kevlar 29 composite. The effect of fiber orientation was also significantly pronounced. As the fiber orientation was away from the testing direction, the flexural storage modulus decreased and the damping factor increased. When the fiber orientation was the same as the testing direction, the effect of fiber volume fraction was pronounced. However, when the fiber orientation was 90 degrees away from the testing direction, the effect of fiber volume fraction was minimal. Damping and stiffness behave in opposite manners around their transition range. After that range, the stiffness of the composites increases with the increase of the frequency, while their damping factors approach a similar constant value irrespective of their fiber orientations and fiber volume fractions. This means that with Kevlar fiber reinforced composites it is possible to achieve both high stiffness and high damping without trade-off. (Author)
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Details
- Title
- Dynamic mechanical behavior of Kevlar fiber reinforced composites
- Creators
- Jenny YuFrank KoJohn Song
- Publication Details
- Materials challenge diversification and the future; Proceedings of the 40th International SAMPE Symposium and Exhibition, Anaheim, CA; UNITED STATES; 8-11 May 1995, pp.711-724
- Conference
- Materials challenge diversification and the future; 40th International SAMPE Symposium and Exhibition, 40th (Anaheim, California, United States, 08 May 1995 - 11 May 1995)
- Number of pages
- 1
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- [Retired Faculty]
- Identifiers
- 991019184085504721