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59 results

Use of DEM and elastic stability analysis to explain the influence of the intermediate principal stress on shear strength

Journal Article
O'Sullivan, C., Wadee, M., Hanley, K., & Barreto, D. (2013)
Use of DEM and elastic stability analysis to explain the influence of the intermediate principal stress on shear strength. Géotechnique, 63(15), 1298-1309. https://doi.org/10.1680/geot.12.p.153
One interesting aspect of soil response is the sensitivity of the mechanical behaviour to the intermediate principal stress. In this study, a fundamental mechanism that explai...

Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects

Journal Article
McDougall, J., Kelly, D., & Barreto, D. (2013)
Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects. Acta geotechnica, 8(6), 619-627. https://doi.org/10.1007/s11440-013-0212-0
Soil particles may be lost through dissolution, degradation or erosion. Regardless of the process of loss, there follows a change in soil structure both in terms of phase comp...

Micromechanical insight into the undrained instability of granular materials: deformation characteristics of geomaterials.

Conference Proceeding
Barreto, D., Prada-Sarmiento, L. F., & Ramos-Cañón, A. M. (2015)
Micromechanical insight into the undrained instability of granular materials: deformation characteristics of geomaterials. In V. A. Rinaldi, M. E. Zeballos, & J. J. Clariá (Eds.), Deformation Characteristics of Geomaterials, 655-662. doi:10.3233/978-1-61499-601-9-655
There is no agreement between experimental researchers whether the point where a granular material responds with a large change of stresses, strains or excess pore water press...

DEM simulations of granular materials involving principal stress rotation.

Presentation / Conference
Barreto, D., O'Sullivan, C., & Zdravkovic, L. (2008, May)
DEM simulations of granular materials involving principal stress rotation. Paper presented at Inaugural International Conference of the Engineering Mechanics Institute - EM'08, Minneapolis, USA
No abstract available.

The influence of inter-particle friction and the intermediate stress ratio on soil response under generalised stress conditions

Journal Article
Barreto, D., & O'Sullivan, C. (2012)
The influence of inter-particle friction and the intermediate stress ratio on soil response under generalised stress conditions. Granular Matter, 14(4), 505-521. https://doi.org/10.1007/s10035-012-0354-z
Previous research studies have used either physical experiments or discrete element method (DEM) simulations to explore, independently, the influence of the coefficient of int...

Volumetric consequences of particle loss by grading entropy

Journal Article
McDougall, J., Imre, E., Barreto, D., & Kelly, D. (2013)
Volumetric consequences of particle loss by grading entropy. Géotechnique, 63(3), 262-266. https://doi.org/10.1680/geot.sip13.t.002
Chemical and biological processes, such as dissolution in gypsiferous sands and biodegradation in waste refuse, result in mass or particle loss, which in turn lead to changes ...

Radial periodic boundaries for axi-symmetric DEM simulations: development, implementation and validation.

Presentation / Conference
O'Sullivan, C., Cui, L., & Barreto, D. (2009, November)
Radial periodic boundaries for axi-symmetric DEM simulations: development, implementation and validation. Paper presented at International Conference on Particle-Based Methods: Particles, Barcelona, Spain
No abstract available.

Evolution of soil fabric and its interpretation using different methods.

Presentation / Conference
Barreto, D. (2008, June)
Evolution of soil fabric and its interpretation using different methods. Paper presented at British Geotechnical Association (BGA) Young Geotechnical Engineers' Symposium, UCL, London
Different methods to study the evolution of fabric anisotropy are presented. DEM simulations on assemblies of spheres subjected to different stress paths using a three-dimensi...

Effect of particle loss on soil behaviour.

Presentation / Conference
Kelly, D., McDougall, J., & Barreto, D. (2012, August)
Effect of particle loss on soil behaviour. Paper presented at ICSE-6 6th International Conference on Scour and Erosion
Soil particle loss can result in strength and volume reductions which are difficult to predict. This paper investigates the influence of the removal of fractions of selected p...

Exploring the effects of stress history on the drained and undrained cyclic behaviour of granular materials.

Presentation / Conference
Barreto, D. (2011, January)
Exploring the effects of stress history on the drained and undrained cyclic behaviour of granular materials. Paper presented at 5th International Conference on Geotechnical Earthquake Engineering (5-ICEGE), Santiago, Chile
This paper presents the results of 3D DEM simulations of granular materials subject to cyclic loading. While both the drained and undrained conditions are considered, the effe...
8 results

RSE Bilateral Exchange Programme - Statistical Entropy in Granular Materials

2018 - 2018
This research builds on existing cooperation with Dr Emoke Imre from Obuda University in Hungary. The aim of the project is to visit the institution in Budapest to further research and deliver a lec...
Funder: Royal Society of Edinburgh | Value: £280

Experimental study of a strengthening technique for rubble walls used in Scottish monuments

2017 - 2018
Experimental study of the pull-out strength of anchors embedded in rubble walls and evaluation of factors affecting the efficiency of such a strengthening intervention. Historic Environment Scotland a...
Funder: Historic Environment Scotland

Development of a European collaborative proposal on big data and machine learning techniques for engineering numerical simulations

2018 - 2018
The PEER activity aims at the development of a Horizon 2020 large-scale research proposal across the disciplines of computational mechanics and of data science. The planned proposal will address impor...
Funder: Scottish Research Partnership in Engineering

Statistical mechanis of particle breakage, fragmentation and shape evolution during shearing of granular materials

2019 - 2019
This is a follow on project, which aims to use statistical entropy concepts to understand the behaviour of granular materials, and will fund a 4-week stay in Hungary to work with Budapest University o...
Funder: Royal Society of Edinburgh | Value: £300

Monitoring Of Railway Related Infrastructure Using Optical Fibre Sensors

2019 - 2020
Student Placement Innovation Voucher as continuation of earlier Standard Innovation Voucher in partnership with Geo-Info Ltd. This project aims to extend the earlier project by assessing the performan...
Funder: Scottish Funding Council | Value: £4,930

Construction on Peat

2020 - 2021
Housing Construction on Peatland: Opening up Opportunities and Minimising Disruption through Innovation – Phase 1 Feasibility of Proposed Solutions
Funder: Construction Scotland Innovation Centre | Value: £34,590

Geotechnical analysis of recycled materials for use in a sports environment

2015 - 2015
The project will investigate the effectiveness of adding crumbed rubber to the site soil as a means of improving soil resilience to wheel loads, resisting erosion and hence reducing maintenance burden...
Funder: Scottish Funding Council | Value: £4,863

Mortice Lock Prototype Development

2019 - 2020
The company has designed a new lock on CAD (computer aided design) which is about 95% complete, the design needs to completed by an expert to the British standards requirements and so as the lock is ...
Funder: Scottish Funding Council | Value: £5,000
9 results

Dr Mark Taylor Appointed to BSI Working Group on Human Exposure to Mechanical Vibration and Shock

5 October 2020
Dr Mark Taylor (Lectuer in Civil Engineering) has been nominated to represent Edinburgh Napier University at a British Standards Institution Working Group (GME/21/6).

Cyclists: why uneven roads and potholes are endangering your health

25 August 2019
A HIGH-TECH bicycle which measures cyclists' exposure to potentially harmful vibrations from uneven road surfaces could be used to check the safety of cycle lanes and other routes. Back problems and ...

Japanese vibration expert joins Scottish monitoring firm Reactec

28 July 2019
Professor Setsuo Maeda, one of the world’s most respected experts in human response to vibration, has been appointed as Reactec’s chief scientific liaison – relocating from Japan to Edinburgh for the ...

Cyclists risk nerve damage from potholes and rough roads, study finds

15 October 2017
Cyclists are at risk of permanent nerve damage because of poor road surfaces, research using an innovative measuring bike has revealed.

Cobbles, potholes, and rough roads can cause nerve damage for cyclists, study finds

12 October 2017
Cyclists who regularly ride on poor road surfaces or cobbles could be at risk of suffering nerve damage in their hands and arms, a new study has found.

Cobbles, potholes, and rough roads can cause nerve damage for cyclists, study finds

8 October 2017
Cyclists who regularly ride on poor road surfaces or cobbles could be at risk of suffering nerve damage in their hands and arms, a new study has found. The study by Edinburgh Napier University found ...

Risk of poorly-maintained roads to cyclists' health highlighted

7 October 2017
Cyclists are risking permanent nerve damage due to poor road surfaces, research by Edinburgh Napier University reported in The Scotsman suggests.

Is your commute causing you permanent nerve damage?

7 October 2017
Potholes are not just a danger to your bike - but could also cause permanent nerve damage to you, according to new research. A study by Edinburgh Napier University discovered that Hand Arm Vibration ...

Cyclists risk nerve damage from uneven street surfaces

7 October 2017
Cyclists are at risk of permanent nerve damage because of poor road surfaces in Scottish cities, research using a innovative measuring bike has revealed.