Dynamic Behaviour of Two-Layered Beam Subjected to Mechanical Load in Thermal Environment

Area of Science:

• Mechanical Engineering
• Materials Science
• Structural Dynamics

Background:

• Composite beams are crucial in engineering applications.
• Understanding their dynamic behavior under combined loads is complex.
• Existing models may not fully capture intricate responses.

Purpose of the Study:

• To investigate the dynamic response of a bilayer composite beam under thermal and mechanical loads.
• To develop and validate reduced-order models for predicting beam behavior.
• To analyze phenomena like resonance, stability, and buckling.

Main Methods:

• Formulation of a three-mode reduced model.
• Development of a simplified one-mode reduction model solved via the harmonic balance method (HBM).
• Validation using a finite element model (FEM) and examination of bifurcation diagrams.

Main Results:

• Comparison of three-mode and one-mode models reveals applicability and limitations.
• Resonance curves and bifurcation diagrams show phenomena like mode interaction, buckling, and multiple solutions.
• Reduced models accurately predict the dynamic behavior validated by FEM.

Conclusions:

• The study provides insights into the complex dynamic behavior of composite beams.
• Simplified models offer efficient analysis tools, with defined limitations.
• Findings are crucial for designing structures subjected to thermal and mechanical stresses.