Title : Effect of natural fibers on the natural frequencies of cylindrical biosourced shells
Abstract:
In the present article, the analysis of the free vibration of partially biosourced Cylindrical Shallow Shells (CSS) is presented with a focus on the effect of fiber contents and curvature. Initially, an experimental study is conducted to manufacture shells with varying Alfa fiber contents (Wf = 5%, 10% and 15%) impregnated with Medapoxy STR resin. The damping coefficients, frequencies, and mode shapes are predicted using free vibration testing with a hammer, with consideration of mass fraction (Wf) and cylinder curvature (k) of the Cylindrical Shallow Shells. Then, a numerical model is developed using ANSYS software to calculate the natural frequencies and the corresponding shapes, which are then compared to the experimental results. The results indicate good agreement between the natural frequencies obtained through experimental testing and those predicted analytically.
Audience Take Away Notes:
- The audience may take this work as a data in their jobs of using biosourced materials
- This research provides a solution for the vibration problem with high amplitude by varying the mass fraction of s fiber of composites
- Our study is based on the effects of the mass fraction of the natural fiber on the natural frequencies of the shell reinforced by short natural fibers
- It has been shown that the increase in curvature of shells leads to an increase in natural frequencies and an increase in fiber content produces an increase in natural frequency
