Effect of bidirectional fiber incorporation in an unbounded anisotropic fiber-reinforced medium with spherical cavity using the finite element method

This work examines coupled thermoelastic responses in a fiber-reinforced solid containing a spherical cavity, formulated within the Green–Naghdi type III (GNIII) theory. The basic equations are solved numerically using the finite element method with quadratic interpolation for the field variables. The cavity surface is subjected to an exponentially decaying pulsed heat flux while remaining mechanically constrained. Graphical results are used to assess how fiber reinforcement and the characteristics of the thermal pulse modify the resulting thermal and mechanical fields. A comparison between reinforced and homogeneous (unreinforced) configurations clarifies the role of reinforcement in reshaping temperature, displacement, and stress distributions. The study offers insights that can inform the design and performance optimization of fiber-reinforced media for thermoelastic engineering applications.