Determination of the Complex Moduli of Viscoelastic Materials by a Free-Vibration Method

Yu Chun Li; Jin Hu Liang

doi:10.4028/www.scientific.net/AMM.166-169.1471

Paper Titles

Experimental Research on Ductility and Bearing Capacity of T-Shaped Columns with HRB500 Reinforcement
p.1450

Elasticity Damage and Plastic Analyses of Masonry
p.1454

Research on Judging Key Components for Collapse of Space Structures
p.1459

Research on Fault Diagnosis Method of the Aircraft Flap System Based on Weighted Fuzzy Petri Net
p.1465

Determination of the Complex Moduli of Viscoelastic Materials by a Free-Vibration Method
p.1471

Temperature Forecasting System of Cement Decomposing Furnace Based on Grey System Theory
p.1475

Analysis of Soil Disturbance Caused by Pipe Jacking Construction
p.1480

A Method of Damage Identification for Shear Buildings
p.1484

Dynamic Response and Failure Mode Analysis on Light-Weight Steel Columns under Blast Loads
p.1489

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 166-169Determination of the Complex Moduli of...

Determination of the Complex Moduli of Viscoelastic Materials by a Free-Vibration Method

Abstract:

Based on the finite-element vibration equations of viscoelastic beam in Laplace domain and the corresponding analytical solution, a semi-analytical frequency equation, which contains the complex modulus of the viscoelastic material, is derived. With several simple measuring instruments, the vibration parameters of the viscoelastic beams can be measured. According to the semi-analytical frequency equation, the complex modulus of the viscoelastic material can be calculated by a nonlinear programming algorithm. As an illustrative example, the vibration test of free-free beams made of viscoelastic expoxy composite material is presented. A five-parameter complex modulus is assumed and evaluated.