Dma calculates the storage modulus

How do you calculate storage & loss moduli from a DMA?

From the DMA, the storage ( E′) and loss ( E″) moduli could be calculated with the in-phase and out-of-phase components of load and displacement cycles when a sinusoidal load is applied [ 15, 16 ].

How does DMA determine a complex modulus?

From the measurements of the force, displacement and phase angle, DMA determines each component of the complex modulus. This estimate also depends on the sample's geometry, operational mode and boundary conditions.

Which DMA machines provide a modulus estimate?

In particular, in this work we present results measured with three DMA machines that are commonly found in the market, namely: PerkinElmer 8000, TA Q800 and Netzsch 242 E Artemis. Although all of them provide the modulus estimate when testing a sample, each manufacturer presents its unique characteristics.

Can a DMA 983 measure modulus?

In addition the DMA 983 can measure modulus in two static (non-oscillatory) modes: creep (constant force) and stress relaxation (constant strain or position). The first section of this paper describes the general equations used to calculate sample modulus from the measured signals of the DMA 983 operating in the oscillatory modes.

How is storage modulus transformed to elastic modulus?

Storage modulus is transformed to elastic modulus over strain rates and temperatures. The transform is validated with experimental results and found to match closely. An adaptive design of experiments scheme is used for reduction in experiments. A single specimen can yield elastic modulus over temperature and strain rate ranges.

How does DMA determine a material's properties?

Based on these measurements, DMA can determine the material's properties, like modulus and viscosity [1, 19]. The material's modulus E * (ω) is reported over the test as a complex quantity that enables one to better analyze the material's behavior.