Departamento de Física

Facultad de Ciencia
Universidad de Santiago de Chile

Laboratorio Física Nolineal

Páginas Laboratorio Física Nolineal

Director laboratorio:
Francisco Melo
Ubicación laboratorio:
Block B-1er Piso-Departamento de Física
(56-2)27 181 209
Email laboratorio:


The fundamental mechanisms responsible of mechanical properties of materials are studied mainly by means of ultrasound and atomic force microscopy techniques. The specific systems under scope are crystalline solids, where dislocations type defects interact with sound waves, fluid gas mixtures, suspensions, granular materials, natural bioceramics and their macromolecules as well as membranes and living cells.  In addition, the effect of macromolecules on the bioceramics growth from solution is investigated by means of  “in situ” atomic force microscopy. 

The understanding of a variety of phenomena associated to granular material flows is one of the major goals of the area, 'specially those features that are relevant for practical applications of these materials in local industry.   Numerical simulations, statistical mechanics theory and intense experimental activity are developed together for these purposes.

Publicaciones del laboratorio


Mechanical impulse propagation in a three-dimensional packing of spheres confined at constant pressure
Santibanez, F,  Zuniga, R, Melo, F
PHYSICAL REVIEW E, Vol. 93, pp. 000369331300015
Stress profile in a two-dimensional silo: Effects induced by friction mobilization
Vivanco, F, Mercado, J, Santibanez, F, Melo, F
PHYSICAL REVIEW E , Vol. 94, pp. 000381896600010
The tearing path in a thin anisotropic sheet from two pulling points: Wulff's view
Ibarra, A, Roman, B, Melo, F
SOFT MATTER, Vol. 12, pp. 5979 , 5985


Pulling on super paramagnetic beads with micro cantilevers: single molecule mechanical assay application
R. Munoz, F. A. Sandoval, C. A. M. Wilson, F. Melo
Physical Biology, Vol. 12 4 Jul, pp. 1478-3967 046011 WOS:000361837200019


Interstitial gas effect on vibrated granular columns
Pastenes, J.C., Géminard, J.C., Melo, F.
Phys. Rev. E., Vol. 89, pp. 62205
Molecular configuration of gelatin-water suspensions at low concentration
Díaz-Calderón,P., Caballero, L., Melo, F., Enrione, J.
Food Hydrocolloids , Vol. 39, pp. 171 , 179


"Effect of packing fraction on shear band formation in a granular material forced by a penetrometer"
F. Tapia, D. Espíndola, E. Hamm, F. Melo
Physical Review E, Vol. 87, pp. 14201
"Gold Nanoparticle-Membrane Interactions: Implications in Biomedicine"
A. Riveros, K. Dadlani, E. Sales, L. Caballero, F. Melo, M. J. Kogan
Journal of Biomaterials and Tissue Engineering, Vol. 3, pp. 4 , 21
"New evidence on the role of catalase in Escherichia coli-mediated biocorrosion"
S. Baeza, N. Véjar, M. Gulppi, M. Azócar, F. Melo, A. Monsalve, J. Pérez-Donoso, C. C. Vásquez, J. Pavez, J. H. X. Zhou, G. E. Thompson, M. A. Páez
Corrosion Science, Vol. 67, pp. 32 , 41
Forbidden Directions for the Fracture of Thin Anisotropic Sheets: an Analogy with the Wulff Plot
A. Takei, B. Roman, J. Bico, E. Hamm, F. Melo
Physical Review Letters, Vol. 110, pp. 144301
The effect of rock decompaction on the interaction of movement zones in underground mining
F. Vivanco, F. Melo
International Journal of Rock Mechanics and Mining Sciences, Vol. 60, pp. 381 , 388
“Large area patterned magnetic films by depositing cobalt layers on nano-wrinkled polydimethylsiloxane templates”
J.Briones, P.Toro, A.Encinas, L.Caballero, J.C.Denardin, F.Melo, E.Cerda, S.Robert, D.Lacour, F.Montaigne
App. Phys. Lett., Vol. 103, pp. 072404
“Oscillating gas flow induces reptation of granular droplets”
J.Contreras, JC.Geminard, F.Melo
Phys. Rev. E, Vol. 88, pp. 012201


"Adhesion, Stretching, and Electrical Charge Assessment of Dermatan Sulfate Molecules by Colloidal Probes"
R. Gonzalez, L. Caballero, J. Pavez, F. Melo
Langmuir, Vol. 28, pp. 9506 , 9514
"Dynamical arching in a two dimensional granular flow"
Francisco Vivanco, Sergio Rica, Francisco Melo
Granular Matter, Vol. 14, pp. 563 , 576
"Effect of cohesion and shear modulus on the stability of a stretched granular layer"
Hector Alarcon, Jean-Christophe Geminard, Francisco Melo
Physical Review E, Vol. 86, pp. 61303
"Flexural fracturing of a cohesive granular layer"
Jean-Christophe Géminard, Lorene Champougny, Pierre Lidon, Francisco Melo
Physical Review E, Vol. 85, pp. 12301
"Ultrasound induces aging in granular materials"
David Espindola, Belfor Galaz, Francisco Melo
Physical Review Letters, Vol. 109, pp. 158301


"A silanol-based nanocomposite coating for protection of AA-2024 aluminium alloy"
E. Gonzalez, J. Pavez, I. Azocar, J. H. Zagal, X. Zhou, F. Melo, G. E. Thompson, M. A. Paez
Electrochimica Acta, Vol. 56, pp. 7586 , 7595
"Experimental evidence of solitary wave interaction in Hertzian chains"
F. Santibañez, R. Muñoz, A. Caussarieu, S. Job, F. Melo
Physical Review E, Vol. 84, pp. 26604
"Fulvic acid inhibits aggregation and promotes disassembly of tau fibrils associated with Alzheimer's disease"
Alberto Cornejo, José M. Jiménez, Leonardo Caballero, Francisco Melo, Ricardo B. Maccioni
Journal of Alzheimer's Disease, Vol. 27, pp. 143 , 153
"The 3D shape of the loosening zone above multiple draw points in block caving through plasticity model with a dilation front"
F. Vivanco, T. Watt, F. Melo
International Journal of Rock Mechanics and Mining Sciences, Vol. 48, pp. 406 , 411
Dynamics of Shear Bands in a Dense Granular Material Forced by a Slowly Moving Rigid Body
E. Hamm, F. Tapia, F. Melo
Physical Review E, Vol. 84, pp. 41304 , 0
Elastic response and wrinkling onset of curved elastic membranes subjected to indentation test
R. Bernal, C. Tassius, F. Melo, J. Ch. Geminard
European Physical Journal E, Vol. 34(2), pp. 13


"Drag force as a tool to test the active mechanical response of PC12 neurites"
R. Bernal, F. Melo, P. A. Pullarkat
Biophysical Journal, Vol. 98, pp. 515 , 523
"Dynamics of soap bubble bursting and its implications to volcano acoustics"
V. Vidal, M. Ripepe, T. Divoux, D. Legrand, J. C. Germinard, F. Melo
Journal of Alloys and Compounds, Vol. 493, pp. 326
"Exploring the surface charge on peptide-gold nanoparticle conjugates by force spectroscopy"
A. R. Guerrero, L. Caballero, A. Adeva, F. Melo
Langmuir, Vol. 26, pp. 12026 , 12032
"Softening induced instability of a stretched cohesive granular layer"
H. Alarcón, O. Ramos, L. Vanel, F. Vittoz, F. Melo, J. C. Geminard
Physical Review Letters, Vol. 105, pp. 208001
"Ultrasound propagation in wet and airless non-consolidated granular materials"
S. Griffiths, A. Rescaglio, F. Melo
Ultrasonics, Vol. 50, pp. 139 , 144


"Calculated isolated extracted and movement zones compared to scaled models for block caving"
F. Vivanco, F. Melo, C. Fuentes
International Journal of Rock Mechanics and Mining Sciences, Vol. 46, pp. 731 , 737
"Wave localization in strongly nonlinear Hertzian chains with mass defect"
F. Melo, S.Job, F.Santibañez, F. Tapia
Physical Review E, Vol. 80, pp. 25602
“Isolated movement zone for interacting draw points in underground mining: dilation effects”
F.Melo, F.Vivanco, C.Fuentes
Micromechanics of Granular Media edited by M. Nakagawa and S.Lunding, AIP Conf, Proc, Vol. 1145, pp. 25


"Acoustic emission associated with the bursting of a gas bubble at the free surface of a non-Newtonian fluid"
T. Divoux, V. Vidal, F. Melo, J. C. Geminard
Physical Review E, Vol. 77, pp. 56310
"Kinematic model for quasi static granular displacements in block caving: Dilatancy effects on drawbody shapes"
F. Melo, F. Vivanco, C. Fuentes, V. Apablaza
International Journal of Rock Mechanics and Mining Sciences, Vol. 45, pp. 248 , 259
"Nonlinear waves in dry and wet Hertzian granular chains"
S. Job, F. Santibanez, F. Tapia, F. Melo
Ultrasonics, Vol. 48, pp. 506 , 514


"Mechanical characterization of elastic membranes: Cell mechanics applications"
R. Bernal, C. Tassius, F. Melo, J. C. Geminard
Applied Physics Letters, Vol. 90, pp. 63903
"Mechanical properties of axon"
R. Bernal, P. A. Pullarkat, F. Melo
Physical Review Letters, Vol. 99, pp. 18301
"On drawbody shapes: from bergmark-roos to kinematic models"
F. Melo, F. Vivanco, C. Fuentes, V. Apablaza
International journal of rock mechanics and mining sciences, Vol. 44, pp. 77 , 86
"Solitary wave trains in granular chains: experiments, theory and simulations"
S. Job, F. Melo, A. Sokolow, S. Sen
Granular Matter, Vol. 10, pp. 13 , 20
Developable Modes in Vibrated Thin Plates
A. Boudaoud, E. Hamm, F. Melo
Physical Review Letters, Vol. 99, pp. 254301


"Acoustic signal associated with the bursting of a soap film which initially closes an overpressurized cavity - Experiment and theory"
Vidal V, Geminard JC, Divoux T, Melo F
EUROPEAN PHYSICAL JOURNAL B, Vol. 54, pp. 321 , 339
"Experimental evidence of shock mitigation in a Hertzian tapered chain"
Melo F, Job S, Santibanez F, Tapia F
PHYSICAL REVIEW E, Vol. 73, pp. 041305
Laser Speckle Correlation Applied to Flow Field Measurements in Granular Media
Hamm E, Melo F
Europhysics Letters, Vol. 73, pp. 356 , 362


"Dynamics of bio-polymeric brushes growing from a cellular membrane: Tentative modelling of the actin turnover within an adhesion unit; the podosome"
Biben T, Geminard JC, Melo F
"Effects of alginic acid from marine algae on calcium carbonate electrodeposited coating"
Pavez J, Silva JF, Melo F
JOURNAL OF CRYSTAL GROWTH , Vol. 282, pp. 438 , 447
"Homogeneous calcium carbonate coating obtained by electrodeposition: in situ atomic force microscope observations"
Pavez J, Silva JF, Melo F
ELECTROCHIMICA ACTA, Vol. 50, pp. 3488 , 3494
"How Hertzian solitary waves interact with boundaries in a 1D granular medium"
Job S, Melo F, Sokolow A, Sen S
PHYSICAL REVIEW LETTERS, Vol. 94, pp. 178002
"Size segregation, convection, and arching effect"
Saez A, Vivanco F, Melo F
PHYSICAL REVIEW E , Vol. 72, pp. 021307


"Experimental study of surface waves scattering by a single vortex and a vortex dipole"
Vivanco, F, Melo, F
PHYSICAL REVIEW E, Vol. 69, pp. 026307
"Wrinkle formations in axi-symmetrically stretched membranes"
J.Ch. Geminard, R. Bernal, F. Melo
European Physical Journal E, Vol. 15, pp. 117 , 126


Normal-Mode Vortex Interactions
R. Bernal, C. Coste, F. Lund, F. Melo
Physical Review Letters, Vol. 89(3), pp. 34501

Proyectos del Laboratorio


Fondecyt Regular

Modified FM tips interacting with supported lipid bilayers: a thermal noise approach
Investigadores principales
Francisco Melo
Investigadores asociados
  • Marcelo Kogan
Número de proyecto:
Año de término:

Fondecyt Regular

Characterization of Granular Flows Created by Interacting Draw Points and its Application to Block Caving
Investigadores principales
Francisco Vivanco
Número de proyecto:
Año de término:

Anillos Científicos

Nano and Micromechanics of Soft Matter Systems
Enrique Cerda
Investigadores principales
Maritza Páez, Marcelo Kogan, Francisco Melo
Investigadores asociados
  • Roberto Bernal
  • Raúl Cordero
  • Eugenio Hamm
  • Francisco Vivanco
Número de proyecto:
Anillo Act 95
Año de término:

Académicos vinculados