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7 results

Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance

Conference Proceeding
Ridley-Ellis, D., Adams, S., & Lehneke, S. (2018)
Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance
The main commercial species in the UK and Ireland is Sitka spruce (Picea sitchensis), which is graded in combination with a small amount of Norway spruce (P. abies). It is typ...

Thinking beyond the usual strength grades – with examples of British spruce and larch

Conference Proceeding
Ridley-Ellis, D., Adams, S., & Lehneke, S. (2016)
Thinking beyond the usual strength grades – with examples of British spruce and larch. In Proceedings of the World Conference on Timber Engineering (WCTE 2016), August 22-25, 2016, Vienna, Austria, Eds.: J. Eberhardsteiner, W. Winter, A. Fadai, M. Pöll, Publisher: Vienna University of Technology
This paper summarises the processes and normative requirements involved in grading of structural timber, and outlines a number of areas in which matters may be improved, so as...

Analysis of acoustical properties of wood and mode identification by sample scanning in the very near field

Conference Proceeding
Pantelić, F., Šumarac Pavlović, D., Mijić, M., & Ridley-Ellis, D. (2016)
Analysis of acoustical properties of wood and mode identification by sample scanning in the very near field. In Zbornik apstrakata i program 60.konferencije ETRAN, Zlatibor
It is possible to achieve a good visualization of vibration modes by microphone scanning of a vibration excited sample of wood in very near field. The experimental settings, s...

The shear strength and failure modes of timber joists obtained from the torsion test method.

Conference Proceeding
Khokhar, A. M., Zhang, H., & Ridley-Ellis, D. (2010)
The shear strength and failure modes of timber joists obtained from the torsion test method. In A. Ceccotti (Ed.), 11th World Conference on Timber Engineering 2010 (WTCTE 2010), (3509-3516
This paper presents details of the experimental method and test results from a series of torsion tests undertaken to evaluate the shear strength of timber joists. The failure...

Computational issues regarding lattice models for wood

Conference Proceeding
Reichert, T., & Ridley-Ellis, D. (2010)
Computational issues regarding lattice models for wood. In A. Ceccotti (Ed.), 11th World Conference on Timber Engineering 2010 (WCTE 2010), (2127-2132
This paper describes means to overcome some of the computational issues related to lattice models. The first is the use of a solution technique, different from a Newton-Raphso...

Determining the Shear Modulus of Sitka Spruce from Torsion Tests

Conference Proceeding
Khokhar, A., Zhang, H., Ridley-Ellis, D. & Moore, J. (2008)
Determining the Shear Modulus of Sitka Spruce from Torsion Tests. In 10th World Conference on Timber Engineering 2008, 2137-2144. ISBN 9781615670888
This paper presents details of the experimental method, and preliminary results from, a series of torsion tests undertaken to evaluate the shear modulus of Sitka spruce (Picea...

Flexural behaviour of Rectangular Hollow Sections with circular side wall openings.

Conference Proceeding
Ridley-Ellis, D. J., Owen, J. S., & Davies, G. (2001)
Flexural behaviour of Rectangular Hollow Sections with circular side wall openings. In R. Puthli, & S. Herion (Eds.), Tubular Structures IX : Proceedings of the Ninth International Symposium and Euroconference, Dusseldorf, Germany, 3-5 April 2001:, 339-348
The influence of circular web openings on the flexura behaviour of Rectangular Hollow Sections is introduced. The results of full-scale laboratory tests in three and four-poi...