TORSION SENSOR MADE OF A SUPER STRUCTURE FIBER BRAGG GRATING EMBEDDED INTO POLYMER MATRIX OF AN AUTOMOBILE COMPOSITE MATERIAL MECHANICAL PART

Results obtained in simulation of a Superstructure Fiber Bragg Grating (SFBG) torsion sensor embedded into the polymer matrix of a fiber reinforced composite material are presented. The SFBG sensor simulation points to an improved smart composite or metallic parts design to be operated under torsion loads in various applications. Simulation consists of correlating the fiber deformation under applied mechanical loads with the modified FBG characteristic reflection spectrum considering the polarization mode variations. The torsion mechanical loads induced shifts in the characteristic reflection spectrum of Bragg wavelength and side bands are analyzed.