Bending Analysis of Multiferroic Semiconductor Composite Beam towards Smart Cement-Based Materials

Area of Science:

• Materials Science
• Solid State Physics
• Civil Engineering

Background:

• Multiferroic materials offer unique magneto-electric coupling properties.
• Piezoelectric semiconductor (PS) materials are crucial for sensing applications.
• Structural health monitoring (SHM) in infrastructure requires advanced sensing technologies.

Purpose of the Study:

• To propose and analyze a novel laminated multiferroic piezoelectric semiconductor (LMPS) beam structure.
• To investigate the magneto-electro-semiconductive (MES) coupling mechanism for magnetic field control of semiconductor properties.
• To explore the potential of LMPS structures for SHM in civil and transportation infrastructures.

Main Methods:

• Development of one-dimensional governing equations for the LMPS beam based on 3D theory.
• Analytical solutions for an LMPS cantilever beam under open-circuit conditions.
• Investigation of multi-field coupling responses under a longitudinal magnetic field.

Main Results:

• The LMPS beam exhibits pure flexure deformation under an applied magnetic field.
• The semiconducting properties of PS layers are modulated by the magnetic field through MES coupling.
• Numerical results indicate amplitude proportionality to the magnetic field and significant influence of the PS layer thickness ratio.

Conclusions:

• The proposed LMPS beam structure effectively demonstrates magnetic field control of semiconductor properties.
• The material and structural design provide a basis for developing advanced SHM systems.
• Integration into cement structures and development of cement-based composites are feasible.