Abstract
The global automotive industry faces the challenge of increasing engine efficiency, reducing fuel consumption and the size of them gradually. Not only the engine block must reduce its size, but also other components, requiring more compact and flexible designs using materials such as thermoplastic elastomers. These kinds of materials are used due to their characteristics, such as ability of deformation, durability, recyclability, and its cost/weight ratio. They are able to hold large deformations and they have very good damping characteristics, making them suitable for use in energy dissipation. Characterization of the dynamic mechanical properties of these materials is essential to make a correct analysis and modeling of the behavior of components. Although the constitutive models of these materials are complex due to high deformability, quasi-incompressibility, softening, and time dependent effects, typically, these materials have a mechanical behavior which can be represented by a phenomenological hyperelastic model. While it is easy to fit a model of elastic behavior, set a model for a hyperelastic material is a very complex task, so in practice simplified models are used. This paper proposes a comprehensive comparison of six hyperelastic models to simulate the behavior of Santoprene 101-73 material manufactured by ExxonMobil. The ability of these models to reproduce different types of loading conditions is analyzed through uniaxial tensile data obtained experimentally. The parameters of each of the hyperelastic models are determined by a least-squares fit and then a classification of these six models is established, highlighting those that are most suitable for characterizing the material.
Highlights
During the last decades the use of polymeric materials has been increased significantly in key industry sectors such as the automotive sector [1, 2]
This paper presents a search for a hyperelastic model that can reproduce as accurately as possible the mechanical behavior of a material of this type
The results show that the mechanical behavior of Santoprene 101‐73 can be adjusted precisely using different models of hyperelastic behavior, because all models provide a good correlation with the data supplied by the manufacturer
Summary
During the last decades the use of polymeric materials has been increased significantly in key industry sectors such as the automotive sector [1, 2]. This is mainly due to the technological capacity of these materials to achieve complex geometries with assumable economic and time costs [3]. Within the family of polymers, thermoplastic elastomeric materials have an increasingly important role [5] Besides they are used as the main material in such important components as tires, they play an essential role in components such as air ducts engine [6]. Lightness, manufacturing capacity, deformability and vibration absorption capability [4] of these materials make them suitable for the manufacture of these elements allowing to produce increasingly compact, lightweight and efficient engines that reduce fuel consumption
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