3 years ago

Comparison of techniques for quantification of internal stress within industrial kiln-dried timber

Nirundorn Matan, Sornthep Vannarat, Sataporn Jantawee, Prawate Diawanich, Satjapan Leelatanon

Abstract

For a quantification of internal stress within industrial kiln-dried timber, a comparison of a new restoring force (RF) technique is made against the McMillen slice test and the standard case-hardening test. Simulation of the RF has been performed by using a numerical model of finite element (FE) analysis. 30 mm thick industrial kiln-dried rubberwood timber with 58, 78 and 100 mm widths was used in the study. The measured RFs for each timber size are proportional to the released strain data measured by the McMillan slice test and the gap openings measured according to the case-hardening test. The FE simulated and measured RFs are in good agreement. The geometrical shape factor as functions of timber width and cutting depth ratio is derived so that the internal stress can then be calculated without accounting for the modulus of elasticity. The calculated maximum internal stresses of all the examined timber sizes fall into a single curve and linearly relate to the released strain data. The RF measurement has the potential to be an alternative method to the existing techniques for a reliable and meaningful assessment of drying stress within industrial kiln-dried timber.

Publisher URL: https://link.springer.com/article/10.1007/s00107-017-1243-2

DOI: 10.1007/s00107-017-1243-2

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.