Dynamic characterization of composites with embedded shape memory alloys: Some experimental results

Book · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:109771

De Santis, S; Trochu, F; Ostiguy, G ^[1]; Sol, H; DeVisscher, J ^[2]

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1. Ecole Polytechnique, Montreal, Quebec (Canada). Dept. de Genie Mecanique
2. Univ. de Bruxelles (Belgium). Dept. d`Analyse Structurale

Composites with embedded Shape Memory Alloy (SMA) fibers are considered to be adaptive materials. The physical properties of these materials can be modified by applying certain stimuli through the fibers. These changes mainly concern stiffness and damping of the material and strongly modify the vibrational behavior of structures made of these materials. The design of smart structures incorporating adaptive materials, assumes precise knowledge of material as well as structure behavior. The paper explores two methods for obtaining a dynamic characterization of thin epoxy composites plates with embedded SMA fibers. The first method, experimental modal analysis, determines the modal parameters of the composite structure. The second method, based on natural frequency and modal damping ratio measurements, determines the complex engineering constants of the composite material. Results are obtained at room temperature for test plates with martensitic and austenitic (Cu/Zn/Al) fibers. Comparisons are made with respect to at est plate without fibers. Finally, a modal strain energy approach is used to numerically determine modal damping ratios of the test plates from the values of the complex engineering constants.

• OSTI ID: 109771
• Report Number(s): CONF-950521--; ISBN 1-56676-313-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM ALLOYS
BUILDINGS
COMPOSITE MATERIALS
COPPER ALLOYS
CORRELATIONS
DAMPING
EPOXIDES
EXPERIMENTAL DATA
FIBERS
FREQUENCY ANALYSIS
MECHANICAL VIBRATIONS
NUMERICAL ANALYSIS
SAMPLE PREPARATION
SHAPE MEMORY EFFECT
ZINC ALLOYS