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  • Strain accumulation process in periodically loaded polymers [Elektronski vir]
    Zupančič, Barbara, 1981- ; Emri, Igor
    Within this paper we present the methodology for analyzing strain accumulation process in polymeric materials when exposed to periodical loading. Within each loading cycle material undergoes a ... combination of the creep and retardation process. At certain conditions the retardation process between two loading cycles cannot be fully completed. Consequently strain starts to accumulate, which leads to hardening of the material and ultimately to the failure of polymeric product. Critical frequency of the applied periodical loading depends on the material retardation time, while the magnitude of accumulated strain on the strength of corresponding discrete spectrum lines. Thus, the mechanical spectrum of polymeric material defines the intensity and the magnitude of accumulated strain. We demonstrate developed methodology for predicting durability of periodically loaded polymeric materials for the case of polymeric nanocomposites with three different concentrations (0 wt.%, 1 wt.%, and 15 wt.%) of nanoparticles added into the polyamide matrix. The results show that higher concentration of nanoparticles added into the polymeric matrix slows down the strain accumulation process and reduces the magnitude of accumulated strain.
    Vir: Proceedings of the 2010 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, June 7-10, 2010, Indianapolis, Indiana USA [Elektronski vir] (Str. [1-6])
    Vrsta gradiva - prispevek na konferenci
    Leto - 2010
    Jezik - angleški
    COBISS.SI-ID - 11454235

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