Abstract
Resistance drilling is based on the correlation between cutting (drilling) resistance and material density and hardness. Small needle-like drill bit is driven into the material with a constant speed and feed rate. Energy needed for the drill to proceed is recorded as a function of the bit position. The resistance-position plot is then used to make inferences on material (voids-no voids). Appropriate drill but size (diameter) must be selected to avoid bending the drill along the late wood annual rings. Correlation between wood mechanical properties and drilling resistance is poor. Core drilling is a local method and gives localized information about the member quality at the location of the test only.
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Lear, G., Kasal, B., Anthony, R. (2010). Resistance Drilling. In: Kasal, B., Tannert, T. (eds) In Situ Assessment of Structural Timber. RILEM State of the Art Reports, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0560-9_5
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DOI: https://doi.org/10.1007/978-94-007-0560-9_5
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-0559-3
Online ISBN: 978-94-007-0560-9
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