Study on the Propagation of Stress Waves in Natural Fiber Composite Strips

Abstract

The propagation of Lamb waves within the structure of natural fiber reinforced composite strips is investigated using a semi-analytical solution and a time domain spectral finite element numerical method. The need to monitor the structural health of natural fiber reinforced composites is becoming greater, as these sustainable composites are being increasingly used in various industrial applications in automotive and marine structures. Three different types of flax fiber composites were studied and the fundamental wave modes were excited on the structure. Both methods under consideration were able to capture the symmetric and antisymmetric wave modes for all the material configurations. Especially the complex nature of a hybrid flax/glass fiber composite was studied and results were very promising for future damage investigation. Further to this, an attempt was made to excite the hybrid strip at higher frequency and the study revealed the potential to capture all the existing wave modes.

Review of advanced techniques for manufacturing biocomposites: non-destructive evaluation and artificial intelligence-assisted modeling

“…However, identifying the optimum fiber roving angle is essential in the filament winding technique to minimize the voids. Therefore, it is essential to investigate the NFRPCs using NDE techniques to control the quality and to fully access the structural integrity [34].…”

Fiber-reinforced composite metamaterials for mode conversion of elastic waves

“…Regarding the design against dynamic loadings and the nondestructive characterization using ultrasonic waves, it is important to understand the wave propagation behavior in fiber-reinforced composites. Therefore, numerous efforts have been devoted [18][19][20][21][22][23][24][25][26][27][28]. Different types of elastic waves were discussed, such as shear and longitudinal waves [18,19,21], Lamb waves [20,26,28], Love waves [23], non-axisymmetric waves [13], etc; various types of composites with unidirectional fibers [18,19], randomly oriented fibers [20], cylindrical fibers [21], nanoinclusions [25], were investigated.…”

“…Therefore, numerous efforts have been devoted [18][19][20][21][22][23][24][25][26][27][28]. Different types of elastic waves were discussed, such as shear and longitudinal waves [18,19,21], Lamb waves [20,26,28], Love waves [23], non-axisymmetric waves [13], etc; various types of composites with unidirectional fibers [18,19], randomly oriented fibers [20], cylindrical fibers [21], nanoinclusions [25], were investigated. The effects of discontinuities and damages on the wave-converting propagation were also discussed [24,27].…”