Imperial College London

ProfessorMariaCharalambides

Faculty of EngineeringDepartment of Mechanical Engineering

Professor of the Mechanics of Materials
 
 
 
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Contact

 

+44 (0)20 7594 7246m.charalambides Website

 
 
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Location

 

516City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

97 results found

Mohammed MAP, Tarleton E, Charalambides MN, Williams JGet al., 2015, A Micromechanics Model for Bread Dough, International Conference of Computational Methods in Sciences and Engineering (ICCMSE), Publisher: American Institute of Physics, Pages: 305-309, ISSN: 0094-243X

The mechanical behaviour of dough and gluten was studied in an effort to investigate whether bread dough canbe treated as a two phase (starch and gluten) composite material. The dough and gluten show rate dependent behaviourunder tension, compression and shear tests, and non-linear unloading-reloading curves under cyclic compression tests.There is evidence from cryo-Scanning Electron Microscopy (SEM) that damage in the form of debonding between starchand gluten occurs when the sample is stretched. A composite finite element model was developed using starch as fillerand gluten as matrix. The interaction between the starch and gluten was modelled as cohesive contact. The finite elementanalysis predictions agree with trends seen in experimental test data on dough and gluten, further evidence that debondingof starch and gluten is a possible damage mechanism in dough.

Conference paper

Mohammed IK, Charalambides MN, Williams JG, Rasburn Jet al., 2015, Modelling Deformation and Fracture in Confectionery Wafers, International Conference of Computational Methods in Sciences and Engineering (ICCMSE), Publisher: AMER INST PHYSICS, Pages: 289-292, ISSN: 0094-243X

The aim of this research is to model the deformation and fracture behaviour of brittle wafers often used in chocolate confectionary products. Three point bending and compression experiments were performed on beam and circular disc samples respectively to determine the 'apparent' stress-strain curves in bending and compression. The deformation of the wafer for both these testing types was observed in-situ within an SEM. The wafer is modeled analytically and numerically as a composite material with a core which is more porous than the skins. X-ray tomography was used to generate a three dimensional volume of the wafer microstructure which was then meshed and used for quantitative analysis. A linear elastic material model, with a damage function and element deletion, was used and the XMT generated architecture was loaded in compression. The output from the FE simulations correlates closely to the load-deflection deformation observed experimentally.

Conference paper

Kinloch AJ, Mohammed IK, Charalambides MN, 2014, Modelling the interfacial peeling of pressure-sensitive adhesives, Journal of Non-Newtonian Fluid Mechanics, Vol: 222, Pages: 141-150, ISSN: 1873-2631

Peel tests were performed using specimens which consisted of a polyester backing membrane supporting an acrylic pressure-sensitive adhesive adhered to a polyethylene substrate. Interfacial separation of the PSA from the polyethylene substrate was observed. Finite element (FE) peeling simulations were conducted which modelled the backing-membrane as an elasto-plastic power-law material, the adhesive as a viscoelastic material and the interfacial properties with a cohesive zone model (CZM). The material properties of the backing membrane and the pressure-sensitive adhesive were measured from tensile and stress relaxation experiments. The cohesive zone parameters were calculated analytically from the peel test data, as well as being measured directly from independent poker-chip probe tack tests. The numerical results from the CZM/FE simulations and the experimental values of the peel forces as a function of the peel angle were found to be in good agreement.

Journal article

Mohammed IK, Charalambides MN, Williams JG, Rasburn Jet al., 2014, Modelling the microstructural evolution and fracture of a brittle confectionery wafer in compression, INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES, Vol: 24, Pages: 48-60, ISSN: 1466-8564

Journal article

Tantideeravit S, Charalambides MN, Balint DS, Young CRTet al., 2013, Prediction of delamination in multilayer artist paints under low amplitude fatigue loading, ENGINEERING FRACTURE MECHANICS, Vol: 112, Pages: 41-57, ISSN: 0013-7944

Journal article

Mohammed IK, Charalambides MN, Williams JG, Rasburn Jet al., 2013, Modelling the deformation of a confectionery wafer as a non-uniform sandwich structure, JOURNAL OF MATERIALS SCIENCE, Vol: 48, Pages: 2462-2478, ISSN: 0022-2461

Journal article

Arora H, Charalambides MN, Tarleton E, Williamson DM, Leppard CLet al., 2013, An image based approach to modelling plastic bonded explosives (PBX) on the micro scale, Pages: 5391-5397

Conference paper

Mohammed MAP, Tarleton E, Charalambides MN, Williams JGet al., 2013, Mechanical characterization and micromechanical modeling of bread dough, JOURNAL OF RHEOLOGY, Vol: 57, Pages: 249-272, ISSN: 0148-6055

Journal article

Tarleton E, Charalambides MN, Leppard C, 2012, Image-based modelling of binary composites, 21st International Workshop on Computational Mechanics of Materials (IWCMM), Publisher: ELSEVIER SCIENCE BV, Pages: 183-186, ISSN: 0927-0256

Conference paper

Hagan EWS, Charalambides MN, Young CRT, Learner TJS, Hackney Set al., 2011, Influence of the inorganic phase concentration and geometry on the viscoelastic properties of latex coatings through the glass-transition, POLYMER, Vol: 52, Pages: 1662-1673, ISSN: 0032-3861

Journal article

Mohammeda IK, Charalambides MN, Williams JG, Rasburn Jet al., 2011, Modelling deformation and fracture in confectionery wafers, 11th International Congress on Engineering and Food (ICEF), Publisher: ELSEVIER SCIENCE BV, Pages: 499-504, ISSN: 2211-601X

Conference paper

Mohammed MAP, Tarleton E, Charalambides MN, Williams JGet al., 2011, A composite model for wheat flour dough under large deformation, 11th International Congress on Engineering and Food (ICEF), Publisher: ELSEVIER SCIENCE BV, Pages: 492-498, ISSN: 2211-601X

Conference paper

Stapountzi OA, Charalambides MN, Williams JG, 2011, The Fracture Toughness of a Highly Filled Polymer Composite, Symposium on Recent Advances in Mechanics, Publisher: SPRINGER-VERLAG BERLIN, Pages: 447-459

Conference paper

Hagan EWS, Charalambides MN, Young CRT, Learner TJS, Hackney Set al., 2010, Viscoelastic properties of latex paint films in tension: Influence of the inorganic phase and surfactants, PROGRESS IN ORGANIC COATINGS, Vol: 69, Pages: 73-81, ISSN: 0300-9440

Journal article

Gamonpilas C, Charalambides MN, Williams JG, Dooling PJ, Gibbon SRet al., 2010, PREDICTING THE MECHANICAL BEHAVIOUR OF STARCH GELS THROUGH INVERSE ANALYSIS OF INDENTATION DATA, APPLIED RHEOLOGY, Vol: 20, ISSN: 1430-6395

Journal article

Gamonpilas C, Charalambides MN, Williams JG, 2009, Determination of large deformation and fracture behaviour of starch gels from conventional and wire cutting experiments, JOURNAL OF MATERIALS SCIENCE, Vol: 44, Pages: 4976-4986, ISSN: 0022-2461

Journal article

Stapountzi OA, Charalambides MN, Williams JG, 2009, Micromechanical models for stiffness prediction of alumina trihydrate (ATH) reinforced poly (methyl methacrylate) (PMMA): Effect of filler volume fraction and temperature, COMPOSITES SCIENCE AND TECHNOLOGY, Vol: 69, Pages: 2015-2023, ISSN: 0266-3538

Journal article

Hagan EWS, Charalambides MN, Young CT, Learner TJS, Hackney Set al., 2009, Tensile properties of latex paint films with TiO2 pigment, MECHANICS OF TIME-DEPENDENT MATERIALS, Vol: 13, Pages: 149-161, ISSN: 1385-2000

Journal article

Goh SM, Alten S, van Dalen G, Farr RS, Gamonpilas C, Charalambides MNet al., 2008, The mechanical properties of model-compacted tablets, JOURNAL OF MATERIALS SCIENCE, Vol: 43, Pages: 7171-7178, ISSN: 0022-2461

Journal article

Gamonpilas C, Charalambides MN, Williams JG, Dooling PJ, Gibbon SRet al., 2008, Characterisation of large deformation behaviour of starch gels using compression and indentation techniques, 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology, Publisher: AMER INST PHYSICS, Pages: 1189-+, ISSN: 0094-243X

Conference paper

Gamonpilas C, Charalambides MN, Williams JG, Dooling PJ, Gibbon SRet al., 2008, Characterisation of fracture behaviour of starch gels using conventional fracture mechanics and wire cutting tests, 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology, Publisher: AMER INST PHYSICS, Pages: 1232-+, ISSN: 0094-243X

Conference paper

Xiao W, Charalambides MN, Williams JG, 2007, Sheeting of wheat flour dough, INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, Vol: 42, Pages: 699-707, ISSN: 0950-5423

Journal article

OA Stapountzi, M Charalambides, JG Williams, 2007, EFFECT OF TEMPERATURE AND FILLER VOLUME FRACTION ON THE STIFFNESS OF PARTICLE REINFORCED POLY- METHYL METHACRYLATE, 13th International Conference on Experimental Mechanics(ICEM13), Publisher: Springer, Dordrecht, The Netherlands

Conference paper

Xiao W, Charalambides MN, Williams JG, 2007, Sheeting of wheat flour dough, International Journal of Food Science and Technology, Vol: 42, Pages: 699-707, ISSN: 0950-5423

Journal article

Charalambides MN, Wanigasooriya L, Williams JG, Goh SM, Chakrabarti Set al., 2006, Large deformation extensional rheology of bread dough, RHEOL ACTA, Vol: 46, Pages: 239-248, ISSN: 0035-4511

<p>The stress-strain curves of bread dough were derived under uniaxial compression, uniaxial tension and equi-biaxial tension loading conditions. In uniaxial compression, a lubricant was used to eliminate frictional effects between the loading platens and the sample. In uniaxial tension, cylindrical samples with thin flat discs at both ends ('I' samples) were tested. The discs at both ends were allowed to air-dry and were subsequently glued onto the loading platens. In equi-biaxial tension, a thin disc of dough was inflated into a bubble using pressurised air. The thickness at the top of the bubble was measured by shining a light through the walls of the bubble and recording the change in light intensity as the wall becomes thinner. All methods ensured that uniform deformation was obtained. Stress and strain were accurately evaluated using image analysis techniques. The tests were performed at various strain rates and speeds that defined the time dependence of the material. A non-linear viscoelastic model based on the Prony series and Van der Waals hyperelasticity was used to predict all test data. The model had a total of five material parameters and two time constants, which were set to represent the actual time scales of the experiments. A reasonable agreement between the experimental data and the chosen material model was observed.</p>

Journal article

Charalambides M, Xiao W, Williams JG, 2006, Rolling of wheat flour dough, 4th International Symposium on Food Rheology and Structure, Pages: 453-458

Conference paper

Charalambides MN, Wanigasooriya L, Williams JG, Goh SM, Chakrabarti Set al., 2006, Large deformation extensional rheology of bread dough, Rheologica Acta, Vol: 46, Pages: 239-248, ISSN: 0035-4511

Journal article

Goh SM, Charalambides MN, Williams JG, 2005, Characterization of the nonlinear viscoelastic constitutive properties of mild cheddar cheese from indentation tests, JOURNAL OF TEXTURE STUDIES, Vol: 36, Pages: 459-477, ISSN: 0022-4901

Journal article

Charalambides MN, Goh SM, Wanigasooriya L, Williams JG, Xiao Wet al., 2005, Effect of friction on uniaxial compression of bread dough, JOURNAL OF MATERIALS SCIENCE, Vol: 40, Pages: 3375-3381, ISSN: 0022-2461

Journal article

Goh SM, Charalambides MN, Williams JG, 2005, On the mechanics of wire cutting of cheese, Conference on Prospects in Fracture in honor of the 65th Birthday of JG Williams, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 931-946, ISSN: 0013-7944

Conference paper

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