Direct complex stiffness test system for viscoelastic material properties

Bradley R. Allen

doi:10.1117/12.239101

1 May 1996 Direct complex stiffness test system for viscoelastic material properties

Bradley R. Allen

Proceedings Volume 2720, Smart Structures and Materials 1996: Passive Damping and Isolation; (1996) https://doi.org/10.1117/12.239101
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

A test system designed specifically to acquire the complex moduli of viscoelastic materials in shear is described. Unique and innovative approaches in the mechanical design, temperature control system, and data acquisition methods provide a standard of accuracy that is rarely seen in dynamic mechanical properties of viscoelastic materials. The system operates on the principle of direct complex stiffness measurements. Unique sensors, hardware layout, and data acquisition and reduction methods maximize the frequency bandwidth and the dynamic range of stiffness, data acquisition speed, and temperature uniformity. Forced liquid convection temperature control also provides unparalleled speed and uniformity in specimen temperatures. Results are demonstrated and scrutinized using characterization software. Characterized data are stored in a database that provides the designer with the capability of searching based on the mechanical parameters commonly needed for damping designs. The end product is an end-to- end system capable of superior data accuracy and acquisition rates, and software that enables the most critical evaluation of results and ready storage in a manner that is efficient for damping design applications.

Citation Download Citation

Bradley R. Allen "Direct complex stiffness test system for viscoelastic material properties", Proc. SPIE 2720, Smart Structures and Materials 1996: Passive Damping and Isolation, (1 May 1996); https://doi.org/10.1117/12.239101

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