Moving Line‐Load‐Induced Dynamics in a Functionally Graded Piezo‐Electromagnetic Fiber‐Reinforced Composite Substrate With Surface Irregularity
Abhishek Kumar Singh, Rishabh Jaiswal, Sayantan Guha
Source abstract
ABSTRACT Understanding the surface response to moving loads poses a fascinating mechanical challenge that is crucial to determining structural strength. Motivated by this issue, this work analyzes the dynamic behavior generated by a uniformly moving line load on the rough upper surface of an irregular functionally graded piezo‐electric‐magnetic fiber‐reinforced composite (FG‐PEMFRC) substrate made of fibers embedded in a matrix. Through exact analytical treatment, explicit expressions are obtained for the incremental normal and shear stresses, horizontal and vertical electric displacements, and horizontal and vertical magnetic inductions under four boundary conditions such as electrically open magnetically short (EOMS), electrically open magnetically open (EOMO), electrically short magnetically short (ESMS), and electrically short magnetically open (ESMO). Parametric effects, such as including maximum irregularity depth, an irregularity factor (covering rectangular, parabolic, and smooth profiles), the functionally graded parameter, surface‐roughness friction coefficient, and constituent volume fractions, are illustrated graphically. Moreover, three types of mechanical coupling are defined, namely electro‐mechanical (EMC), magneto‐mechanical (MMC), and electro‐magneto‐mechanical (EMMC), and are also graphically illustrated. Taken together, these findings may be useful in numerous domains, including road and runway construction, advanced sensor and energy‐harvester development, and so on.
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