Abstract
Plasticized poly(vinyl chloride) (PPVC) is widely used in the automotive industry in the design of structural parts for crashworthiness applications. Thus, it is necessary to study and understand the influence of the mechanical response and mechanical properties of PPVC over a wide range of strain rate, from quasi-static to dynamic loadings. The process is also investigated using different sample thicknesses. In this work, the strain rate effect of a new PPVC is investigated over a wide range of strain rates at three temperatures and for three thicknesses. A modelling of the yield stress is also proposed. The numerical prediction is in good agreement with the experimental results.
Highlights
Polymeric materials are widely used in automotive industry in order to reduce the mass of vehicles and, by consequence, reduce the fuel consumption
The stress-strain behaviour of plasticized poly(vinyl chloride) (PVC) (PPVC), with thickness TH2, under uniaxial tension at low strain rate and uniaxial compression at high strain rate is presented in Fig. 1 for different temperatures
At −30 ◦C and at low strain rate, in Fig. 1(a), the PPVC exhibits viscoelasticviscoplastic behaviour. For this temperature and this range of strain rate, the PPVC is tested in its glass transition region
Summary
Polymeric materials are widely used in automotive industry in order to reduce the mass of vehicles and, by consequence, reduce the fuel consumption. A large part of the PVC used in automotive industry is modified by plasticizing in order to obtain flexible PVC at room temperature This new material, so-called plasticized PVC (PPVC), is obtained by mixing powdered resin with stabilizer, plasticizer, lubricant and dioctyl phthalate due to lack of thermal stability of PVC at processing temperatures [4, 5]. Contrary to Kendall and Siviour [6, 7], they found that the PPVC exhibited a glassy behaviour with the yield point followed by the strain softening at room temperature and high strain rate. The strain rate sensitivity of new plasticized PVC, for the automotive industry, is investigated over a wide range of temperatures and strain rates. In order to verify that the PPVC processing does not affect the mechanical properties of the material, the manufacturer has prepared three different thicknesses
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