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System Components

• Phase-lock amplifier
• Variety of test methods to enable dynamic testing

Features and Benefits

• Improved understanding of strain-rate sensitive materials
• Improved understanding of time-dependent response
• Characterization of storage and loss modulus (anelastic and viscoelastic materials)
• Improved statistical sampling

As an optional component on T150 UTM™ universal testing systems, the CDA ( Continuous Dynamic Analysis) extension provides a simple means of determining dynamic properties such as storage and loss modulus. In conventional universal testing systems, dynamic properties are ascertained through fatigue regimes, where an oscillation is applied by the cross head and subsequently measured by the flexure within the load cell. The CDA extension, however, utilizes a technique whereby a nano-mechanical actuating transducer, or NMAT, applies an oscillatory force that is superimposed over the nominal force. The amplitude of the oscillation is measured by a capacitive sensor that is an integral part of the NMAT. As a result, the CDA technique can be used to impose oscillatory forces at a higher frequency than what could be accomplished by imposing the oscillation via the cross head. The CDA technique also presents the advantage of measuring high frequency oscillatory specimen response.