Fraunhofer LBF is equipped with measurement stations for dynamic mechanical analysis (DMA), which can be used to determine the right choice of material, assist in product development and service life time prediction of elastomers. Frequency and time independent measurements of the dynamic shear modulus and modulus of elasticity can be executed at a temperature range between -120 °C and 300 °C. These measurements can be complemented with ultrasound examinations in the megahertz frequency range. Under assumption of the frequency-temperature-equivalence, master curves of storage modulus and loss modulus can be created. Besides dynamic experiments, relaxation and retardation experiments are also possible. By adjusting the measurement data to material models, the input parameters for FEM simulations can be provided. The modulus value of the rubber plateau allows statements regarding the cross-link density.
A special feature of DMA measurements is the capability of carrying out the tests in organic liquids (e.g. oils or fats) or under defined humidity. Further applications of DMA are found on a separate page.