5/7/2023 0 Comments Rubber vibration isolator![]() ![]() The frequently used rubber materials, micro- and nano-fillers used in the rubber-based industry have been summarized. Song, in Progress in Rubber Nanocomposites, 2017 2.5 Summary It is important to consider the influence of these factors in analyzing the composite reinforcement and the role interfacial interaction plays. Similar to the Payne effect, if glassy rubber forms on the particle surface, under the first large deformation this glassy layer will be irreversibly broken and lead to smaller stiffness in the following tests. ![]() This is associated with cross-linking bond breakage, strongly stretched molecules, and polymer chain shortening. Mullins effect refers to the phenomenon that under large deformations, stiffness reaches the maximum for the first test compared to those in the following test at the same or even lower strain. In composites, the rubber molecules adsorb on the particle surface and become deadhesive under larger strains, therefore, a smaller slope in stress–strain curves are observed. Stress–strain curves show lower slopes with strain increase, and more straightforwardly dynamic mechanical measurements display a lower plateau of storage modulus as deformation continues. The Payne effect refers to the observation that with the increase of deformation, the stiffness decreases. Other nonlinear mechanical behavior includes Mullins effect (stress softening under large-strain deformation) and the Payne effect (strain-dependent dynamic modulus within small strain). The discussions above mainly focus on linear mechanical behavior usually within small strains. This makes a clear evaluation of the rubber composite mechanics very difficult. Particle filled rubber materials possess rubbery features, including viscoelasticity. Song, in Progress in Rubber Nanocomposites, 2017 4.2.1.3 Viscoelasticity ![]()
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