High strain rate radial compression of Norway spruce earlywood and latewood

Carolina S. Moilanen, Tomas Björkqvist, Birgitta A. Engberg, Lauri I. Salminen, Pentti Saarenrinne

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)


    The mechanical properties of Norway spruce were studied and a compression model for mechanical pulping was developed. The split-Hopkinson pressure bar technique was combined with high-speed photography to analyse local radial compression. Data analysis focussed on the differences between mechanical properties of earlywood and latewood. Measurements were conducted at both room temperature and 135 °C. The effect of pre-fatigue treatment was also studied. A simple material model was defined linearly in parts and fitted to the measurement data to quantify the differences. New results were found on the differences in inelastic behaviour of earlywood and latewood at large deformations. In addition, other results were in line with previously published results.
    Original languageEnglish
    Pages (from-to)873-889
    Number of pages17
    Issue number1
    Early online date26 Nov 2015
    Publication statusPublished - 1 Feb 2016
    Publication typeA1 Journal article-refereed


    • Norway spruce
    • radial compressio
    • split-Hopkinson pressure bar
    • high speed photography
    • local strain

    Publication forum classification

    • Publication forum level 2


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