Journal article Open Access

Micromechanical properties of beech cell wall measured by micropillar compression test and nanoindentation mapping

Petr Klímek; Václav Sebera; Darius Tytko; Martin Brabec; Jaroslav Lukeš

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      <creatorName>Petr Klímek</creatorName>
      <affiliation>TESCAN a.s.</affiliation>
      <creatorName>Václav Sebera</creatorName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="">0000-0002-2658-1179</nameIdentifier>
      <affiliation>Innorenew CoE; University of Primorska</affiliation>
      <creatorName>Darius Tytko</creatorName>
      <affiliation>TESCAN GmbH</affiliation>
      <creatorName>Martin Brabec</creatorName>
      <affiliation>Mendel University in Brno</affiliation>
      <creatorName>Jaroslav Lukeš</creatorName>
      <affiliation>Bruker Nano Surfaces – Hysitron</affiliation>
    <title>Micromechanical properties of beech cell wall measured by micropillar compression test and nanoindentation mapping</title>
    <subject>cell wall</subject>
    <subject>mechanical properties</subject>
    <subject>micropillar compression</subject>
    <date dateType="Issued">2020-02-11</date>
  <resourceType resourceTypeGeneral="JournalArticle"/>
    <alternateIdentifier alternateIdentifierType="issn">1437-434X</alternateIdentifier>
    <alternateIdentifier alternateIdentifierType="url"></alternateIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1515/hf-2019-0128</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf"></relatedIdentifier>
    <rights rightsURI="">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
    <description descriptionType="Abstract">&lt;p&gt;Wood exhibits very different behavior and properties at different scales. One important scale is the cell wall (CW) that is commonly tested by nanoindentation. Common nanoindentation provides important insight into the material but has limitations because it does not apply uniaxial stress and provides data from single spots. Therefore, the aim was to examine beech CW using two stateof-the-art techniques: micropillar compression (MCo) and nanoindentation mapping (NIP). The mean strength of the beech CW was found to be about 276&amp;nbsp;MPa and the mean yield stress was 183&amp;nbsp;MPa. These values were higher than those in most cited literature, which was attributed to the fact that libriform fibers from beech late wood were measured. Mean E obtained from MCo was about 7.95&amp;nbsp;GPa, which was lower than the values obtained on a macrolevel and about 61% of the value obtained from NIP. NIP also showed that E of the CW around the middle lamella (ML) was about 64% of the value at the location attributed to the S2 layer. Lower E from MCo may be caused by sinking of the micropillar into the wood structure under the load. Failure of the micropillars showed gradual collapse into themselves, with debonding at the S3 layer or the MLs.&lt;/p&gt;</description>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/739574/">739574</awardNumber>
      <awardTitle>Renewable materials and healthy environments research and innovation centre of excellence</awardTitle>
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