Imperial College London
Portrait Picture

ProfessorDanieleDini

Faculty of Engineering, Department of Mechanical Engineering

Professor in Tribology
 
 
 
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Contact

 

+44 (0)20 7594 7242d.dini Website

 
 
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Location

 

669City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

456 results found

Gaucherin G, Hofmann F, Belnoue JP, Korsunsky AMet al., 2009, Crystal plasticity and hardening: a dislocation dynamics study, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 241-244, ISSN: 1877-7058

Conference paper

Abbey B, Zhang SY, Vorster WJJ, Korsunsky AMet al., 2009, Feasibility study of neutron strain tomography, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 185-188, ISSN: 1877-7058

Conference paper

Korsunsky AM, Song X, Belnoue J, Jun T, Hofmann F, De Matos PFP, Nowell D, Dini D, Aparicio-Blanco O, Walsh MJet al., 2009, Crack tip deformation fields and fatigue crack growth rates in Ti–6Al–4V☆, Pages: 1771-1779, ISSN: 0142-1123

In this paper we present an overview of experimental and modelling studies of fatigue crack growth rates in aerospace titanium alloy Ti-6Al-4V. We review work done on the subject since the 1980s to the present day, identifying test programmes and procedures and their results, as well as predictive approaches developed over this period. We then present the results of some of our recent experiments and simulations. Fatigue crack growth rates (FCGRs) under constant applied load were evaluated as a function of crack length, and the effect of overload (retardation) was considered. Crack opening was measured during cycling using digital image correlation, and residual stress intensity factor was determined using synchrotron X-ray diffraction mapping. Modelling techniques used for the prediction of FCGRs are then reviewed, and an approach based on the analysis of energy dissipation at the crack tip is proposed. Finally, directions for further research are identified.

Conference paper

Sih GC, Korsunsky AM, Dini D, 2009, Mesomechanics 2009 Foreword: Dissipation and damage across multiple scales in physical and mechanical systems, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 1-3, ISSN: 1877-7058

Conference paper

Wang S, Zhuang W, Balint D, Lin Jet al., 2009, A virtual crystal plasticity simulation tool for micro-forming, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 75-78, ISSN: 1877-7058

Conference paper

Reina S, Dini D, Hills DA, 2009, On the accurate prediction of interfacial micro-slip in frictional joints using distributed dislocations and quadratic programming techniques, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 181-184, ISSN: 1877-7058

Conference paper

Zografos A, Dini D, 2009, A combined BEM/Contact Asymptotics (BEM-CA) semi-analytical formulation for the assessment of fretting damage in bolted joints, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 201-204, ISSN: 1877-7058

Conference paper

Balcombe R, Fowell MT, Dini D, 2009, Modelling rolling contact fatigue cracks in the hydrodynamic lubrication regime: a coupled approach, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 245-248, ISSN: 1877-7058

Conference paper

Rognin F, Abdi F, Kunc V, Lee M, Nikbin Ket al., 2009, Probabilistic methods in predicting damage under multi-stage fatigue of composites using load block sequences, Mesomechanics 2009 Conference, Publisher: ELSEVIER SCIENCE BV, Pages: 55-58, ISSN: 1877-7058

Conference paper

Accardi MA, Dini D, 2009, MODELLING OF THE MECHANICAL BEHAVIOUR OF HUMAN JOINTS CARTILAGE, STLE/ASME 2008 International Joint Tribology Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 147-149

Conference paper

Medina S, Dini D, Olver AV, Hills DAet al., 2009, FAST COMPUTATION OF FRICTIONAL ENERGY DISSIPATION IN ROUGH CONTACTS UNDER PARTIAL SLIP, STLE/ASME 2008 International Joint Tribology Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 573-575

Conference paper

Reina S, Dini D, 2009, INCIPIENT SLIP AND FRICTIONAL CREEP OF TYRED SYSTEMS, STLE/ASME 2008 International Joint Tribology Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 613-615

Conference paper

Dini D, Hills DA, 2008, Characteristics of asymptotic solutions for slightly rounded contacts, Tribology - Materials, Surfaces and Interfaces, Vol: 2, Pages: 121-127, ISSN: 1751-5831

The characteristics of a semi-infinite flat and rounded contact, subject to constant normal load and oscillating shear, are found. These include the slip displacement and frictional energy expenditure, together with the process of frictional shakedown. The set of solutions is applied to the problem of a D shaped punch having a very small radius at the notionally sharp corner. The possible application of the methodology outlined in this paper to a range of fretting fatigueproblems is also discussed. © 2008 W. S. Maney & Son Ltd.

Journal article

Banerjee N, Dini D, Hills DA, 2008, Frictional complete contacts subject to shear and bulk tension, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, Vol: 222, Pages: 2301-2309, ISSN: 0954-4062

Journal article

Qiu H, Dini D, Hills DA, 2008, Torsional contact of an elastic flat-ended cylinder, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, Vol: 56, Pages: 3352-3362, ISSN: 0022-5096

Journal article

Dini D, Sackfield A, Hills DA, 2008, An axi-symmetric Hertzian Contact subject to cyclic shear and severe wear, WEAR, Vol: 265, Pages: 1918-1922, ISSN: 0043-1648

Journal article

Song X, Zhang SY, Dini D, Korsunsky AMet al., 2008, Finite element modelling and diffraction measurement of elastic strains during tensile deformation of HCP polycrystals, Symposium on Frontiers in Computational Materials Science, Publisher: ELSEVIER SCIENCE BV, Pages: 131-137, ISSN: 0927-0256

Conference paper

Dini D, Barber JR, Churchman CM, Sackfield A, Hills DAet al., 2008, The application of asymptotic solutions to contact problems characterised by logarithmic singularities, EUR J MECH A-SOLID, Vol: 27, Pages: 847-858, ISSN: 0997-7538

We give the contact pressure distribution near a contacting wedge having a slightly rounded form adjacent to a discontinuity in surface profile. It is shown that, well away from the rounding the pressure is logarithmic in form, just as it is near the apex of a sharp wedge. This pair of solutions may then be used to 'patch in' a roundness correction relevant to any punch having a discontinuous gradient. Further, it is noted that the multiplier on the logarithm term is pre-determined by the change in gradient. This process is applied to a finite, slightly blunt wedge, where the exact answer is known, and to a wheel having a worn flat. The agreement with the exact solution in the former case is seen to be very good. (c) 2007 Elsevier Masson SAS. All rights reserved.

Journal article

Qiu H, Hills DA, Dini D, 2008, Further consideration of closure at the root of a sharp notch, JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, Vol: 43, Pages: 405-409, ISSN: 0309-3247

Journal article

Qiu H, Paynter RJH, Dini D, Hills DAet al., 2008, The state of stress induced by ring dislocations in a semi-infinite stepped shaft, EUROPEAN JOURNAL OF MECHANICS A-SOLIDS, Vol: 27, Pages: 269-284, ISSN: 0997-7538

Journal article

Qiu H, Hills DA, Nowell D, Dini Det al., 2008, Skew sliding of an elastic cylinder: An investigation of convection in contact, INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, Vol: 50, Pages: 293-298, ISSN: 0020-7403

Journal article

Korsunsky AM, Dini D, Walsh MJ, 2008, Prediction of fatigue crack growth rates in Ti-6Al-4V alloy, Solid Mechanics and its Applications, Vol: 152, Pages: 47-64, ISSN: 0925-0042

Crack initiation under thermo-mechanical fatigue is analyzed with consideration given to oxidation and creep strain accumulation. Transitions and interactions between different mechanisms, crack initiation and crack propagation rates display significant scaling and size effects. The objective of this work is to present experimental data for crack initiation and propagation in aerospace alloys, and to offersome means of describing these data so as to develop improved capabilities for life prediction in aerospace materials and assemblies. © Springer Science+Business Media B.V. 2008.

Journal article

Korsunsky AM, Dini D, Walsh MJ, 2008, Prediction of Fatigue Crack Growth Rates in Ti-6Al-4V Alloy, Multiscale Fatigue Crack Initiation and Propagation of Engineering Materials: Structural Integrity and Microstructural Worthiness, Editors: SIh, Netherlands, Publisher: Springer, Pages: 47-64, ISBN: 978-1-4020-8519-2

Book chapter

Song X, Zhang SY, Dini D, Korsunsky AMet al., 2008, Inter-granular residual stresses in polycrystalline aggregates: finite element modelling and diffraction post-processing, MECASENS 4th International Conference on Stress Evaluation using Neutrons and Synchrotron Radiation, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 271-+, ISSN: 0255-5476

Conference paper

Korsunsky AM, Dini D, Walsh MJ, 2008, Fatigue crack growth rate analysis in a titanium alloy, 7th International Conference on Fracture and Damage Mechanics, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 5-+, ISSN: 1013-9826

Conference paper

Zhang SY, Song X, Dini D, Korsunsky AMet al., 2007, Formulation and calibration of a crystal plasticity finite element model for HCP polycrystals, Computational Plasticity - Fundamentals and Applications, COMPLAS IX, Pages: 639-642

Journal article

Olver AV, Dini D, Lainé E, Beveridge TA, Hua DYet al., 2007, Roughness and lubricant chemistry effects in micropitting, American Gear Manufacturers Association - Fall Technical Meeting of the American Gear Manufacturers Association 2007, AGMA, Pages: 151-160

Micropitting has been studied using a disc machine in which a central carburised steel test roller contacts three, harder, counter-rollers ("rings") with closely controlled roughness. We varied the roughness using different finishing techniques and investigated the effects of different oil base-stocks and additives, whilst keeping the viscosity approximately constant. We also developed a predictive model for the approximate analysis of rough-surface elastohydrodynamic lubrication based on the FFT approach of Hooke. Damage on the test rollers included dense micropitting and "micropitting erosion" in which tens of microns of the test surface were completely removed. This phenomenon is particularly damaging in gear teeth where it has the potential to destroy profile accuracy. It was found that anti-wear additives led to a high rate of micropitting erosion and that the effect correlated more or less inversely with simple sliding wear results. There were also appreciable effects from base-stock chemistry. The key parameter affecting the severity of damage seemed to be the near-surface shear stress amplitude arising from the evolved roughness; different chemistries led to the evolution of different roughness during initial running and thence to different contact stresses and different levels of damage. © AGMA 2007 - All rights reserved.

Journal article

Song X, Zhang SY, Dini D, Korsunsky AMet al., 2007, Microscopic energy dissipation and fatigue crack initiation in polycrystalline metallic alloys, Computational Plasticity - Fundamentals and Applications, COMPLAS IX, Pages: 709-712

In this paper we propose an energy-based criterion for life-prediction of fatigue crack initiation via a 3D, elastically anisotropic FE model for cyclic deformation and hardening of face-centred cubic (FCC) materials. © CIMNE, 2007.

Journal article

Olver AV, Dini D, 2007, Roughness in lubricated rolling contact: the dry contact limit, P I MECH ENG J-J ENG, Vol: 221, Pages: 787-791, ISSN: 1350-6501

A difficulty with the standard fast Fourier transform (FFT) perturbation model of roughness in lubricated rolling contacts is that it does not necessarily converge towards the elastic case as the film thickness is reduced; rather it leads to a situation in which all the roughness is completely flattened. This is rarely the case for real engineering surfaces.Here, it is shown that this difficulty can be avoided by carrying out a Fourier transform of the elastostatically flattened roughness and using the resulting (complex) amplitude as the low-film thickness limit of each Fourier component in the elastohydrodynamic lubrication (EHL) analysis.Results give a plausible convergence to the elastostatic solution, which is nevertheless consistent with the expected near-full-film EHL behaviour and which becomes identical to the earlier model for roughness that, statically, can be fully flattened. As expected, hydrodynamic action persists at the finest scale, even for very thin films.

Journal article

Korsunsky AM, Dini D, Dunne FPE, Walsh MJet al., 2007, Comparative assessment of dissipated energy and other fatigue criteria, 6th International Conference on Fatique Damage of Structural Materials, Publisher: ELSEVIER SCI LTD, Pages: 1990-1995, ISSN: 0142-1123

Conference paper

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