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All Outputs (65)

Structural timber on the scales. (2013)
Presentation / Conference Contribution
Ridley-Ellis, D. (2013, December). Structural timber on the scales

Telford Institute Workshop on "Anisotropic, Heterogeneous and Cellular Materials: Micro-architecture to Macro-level Responses"

Timber grading seminar for sawmillers. (2013)
Presentation / Conference Contribution
Ridley-Ellis, D. (2013, March). Timber grading seminar for sawmillers

This grading seminar will give you a crash course in timber grading, what it is, how it is done and how it is likely to change in future. It aims to demystify timber grading, tackle some widely held misconceptions, and tell you the things sawmillers... Read More about Timber grading seminar for sawmillers..

Public engagement - what it means for researchers. (2012)
Presentation / Conference Contribution
Ridley-Ellis, D. (2012, November). Public engagement - what it means for researchers. Presented at Queen Margaret University - Doctoral Student Conference

The shear strength and failure modes of timber joists obtained from the torsion test method. (2010)
Presentation / Conference Contribution
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 modes and the correlation of shear strength and torsional shear modulus we... Read More about The shear strength and failure modes of timber joists obtained from the torsion test method..

Computational issues regarding lattice models for wood (2010)
Presentation / Conference Contribution
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-Raphson approach, called the Step-Size-Control (SSC) algorithm to handle strain-s... Read More about Computational issues regarding lattice models for wood.

The future of quality control for wood & wood products. (2010)
Presentation / Conference Contribution
(2010). The future of quality control for wood & wood products. In D. Ridley-Ellis, & J. Moore (Eds.), Proceedings of the final conference of COST Action E53

The principal aim of the COST Action E53 was to improve methods of quality control in processing round wood and timber to ensure that timber products and components meet the requirements of the users. The Action also promoted the improvement of spe... Read More about The future of quality control for wood & wood products..

Determination of shear strength of timber joists by torsion testing. (2009)
Presentation / Conference Contribution
Khokhar, A. M., Zhang, H., & Ridley-Ellis, D. (2009). Determination of shear strength of timber joists by torsion testing. In J. A. Santos (Ed.), Proceedings of COST E53 conference "Economic and Technical aspects of quality control for wood and wood produ

This paper presents an experimental investigation in which the torsion testing approach was employed to evaluate the shear strength of Sitka spruce and Norway spruce joists. Rectangular structural size specimens of lengths ranging from 1.0 m to 3.6... Read More about Determination of shear strength of timber joists by torsion testing..

The use of acoustic-based NDT to predict the wood properties of UK-grown Sitka spruce at different stages in the wood supply chain. (2009)
Presentation / Conference Contribution
Moore, J., Lyon, A. J., Searles, G. J., & Ridley-Ellis, D. (2009). The use of acoustic-based NDT to predict the wood properties of UK-grown Sitka spruce at different stages in the wood supply chain. In H. Zhang, & X. Wang (Eds.), Proceedings of the 16th I

This paper is concerned with the extent to which portable stress-wave-based instruments can be used to segregate Sitka spruce trees and logs; in particular the relationship between acoustic velocity and the properties of sawn timber. Measurements wer... Read More about The use of acoustic-based NDT to predict the wood properties of UK-grown Sitka spruce at different stages in the wood supply chain..

Random acts of elasticity: MoE, G and EN408. (2009)
Presentation / Conference Contribution
Ridley-Ellis, D., Moore, J., & Khokhar, A. M. (2009). Random acts of elasticity: MoE, G and EN408.

The paper examines the variation in modulus of elasticity (MoE) and shear modulus (G) within sawn timber and the implications for testing timber in accordance with EN408:2003. A combination of mechanical testing and simple analytical modelling is us... Read More about Random acts of elasticity: MoE, G and EN408..

Online learning for the forest and timber industries. (2008)
Presentation / Conference Contribution
Ridley-Ellis, D., Nolte, S., & Condon, P. (2008). Online learning for the forest and timber industries. In 10th World Conference on Timber Engineering 2008 (461-469)

Online learning offers advantages for all levels of training and development in the timber industries, from new recruits at technician level to chartered professionals. Learners and employers both value the flexibility it affords, while educators val... Read More about Online learning for the forest and timber industries..

Strength grading and the end user – lessons from the SIRT project at Napier University (2008)
Presentation / Conference Contribution
Ridley-Ellis, D., Moore, J., & Lyon, A. J. (2008). Strength grading and the end user – lessons from the SIRT project at Napier University.

The paper reviews the research that has been undertaken by the Strategic Integrated Research in Timber (SIRT) project at Napier University, with reference to the technologies, techniques and approaches required to grade the UK’s timber resource accor... Read More about Strength grading and the end user – lessons from the SIRT project at Napier University.

Determining the Shear Modulus of Sitka Spruce from Torsion Tests (2008)
Presentation / Conference Contribution
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)

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 sitchensis) timber. Direct torsion tests were used to determine the variat... Read More about Determining the Shear Modulus of Sitka Spruce from Torsion Tests.

Torsion tests on small and large-scale RHS with circular wall cut-outs (2007)
Presentation / Conference Contribution
Ridley-Ellis, D., Owen, J. S., & Davies, G. (2007). Torsion tests on small and large-scale RHS with circular wall cut-outs.

The results of small and large-scale torsion tests on rectangular section tubes with circular wall perforations are presented and discussed. Perforations are shown to cause the torsional resistance to be re-duced by up to 60% and stiffness to be redu... Read More about Torsion tests on small and large-scale RHS with circular wall cut-outs.