Effect of loading rate on the creep behaviour of epoxy resin insulators by nanoindentation

Kunkun Fu, Yuan Chang, Youhong Tang, Bailin Zheng

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    In the present work, the effect of loading rate on indentation creep was studied. Indentation creep tests were conducted on epoxy resin to provide creep deformation under constant load, contact creep compliance and cut-off time using a Berkovich indenter. Several loading rates, ranging from 0.25 to 6 mN/s, were used to perform the tests. The results showed that there is a strong loading rate dependence on creep response of the epoxy resin under indentation. Contact creep compliance and cut-off time decreased with increasing loading rate. In contrast, an increase in reduced modulus, hardness, displacement variation and contact creep compliance variation during the holding time was noticed. The loading rate sensitivity on creep response under indentation can be attributed to viscoelastic response prior to holding segment and strain rate effect on yield stress of the epoxy resin. This study provided an insight to understand the loading rate dependence on creep behaviour of epoxy resin under indentation.

    Original languageEnglish
    Pages (from-to)3552-3558
    Number of pages7
    JournalJournal of Materials Science: Materials in Electronics
    Volume25
    Issue number8
    DOIs
    Publication statusPublished - Aug 2014

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