top
logo logo

Vínculos

       
        *   FCFM
        *   U. de Chile

        *   Guia Telefonica
       

Login de Ingreso




Home Páginas Investigadores Fernando Lund P.
Fernando Lund P.

E-Mail: flund@dfi.uchile.cl

Dirección: Av. Blanco Encalada 2008, Piso 1

Fono: 978 4854

Página Web:

Jerarquia y Cargo: Profesor Titular

Líneas de Investigación :

Research Lines:

Física de materiales con énfasis en sus propiedades mecánicas.

La figura de la derecha muestra el patrón de interferencia entre una onda elástica que incide sobre una dislocación, y la onda escatereada por dicha dislocación, en un medio elástico continuo. La comprensión detallada de este fenómeno es parte de un programa orientado a desarrollar modelos cuantitativos predictivos para el comportamiento plástico de metales y aleaciones.

La descripción teórica de estos fenómenos ha sido desarrollada en colaboración con F. Barra (DFI), A. Maurel (ESPCI, Paris, Francia) y V. Pagneux (LAUM, Le Mans, Francia), entre otros. N. Mujica (DFI) ha desarrollado experimentos usando Espectroscopía de Resonancia Ultrasónica (RUS). A. Zúñiga (DIMec) y R. Espinoza (DCM) realizan mediciones de microscopía electrónica de alta resolución (HRTEM), así como difracción de rayos X (DRX), como parte del proceso de validación de los resultados.

 

Materials physics, especially mechanical properties.

The figure on the right shows the interference pattern between an elastic wave that is incident upon a dislocation, and the wave that is scattered by said dislocation within a continuous elastic medium. The detailed understanding of this phenomenon is part of a program that aims at developing predictive quantitative models for the plastic behavior of metals and alloys.

The theoretical description of these phenomena has been developed in collaboration with F. Barra (DFI), A. Maurel (ESPCI, Paris, Francia) and V. Pagneux (LAUM, Le Mans, Francia), among others. N. Mujica (DFI) has developed Resonant Ultrasound Spectroscopy (RUS) experiments. A. Zuniga (DIMec) and R. Espinoza (DCM) perform High Resolution Transmission Electron Microscopy (HRTEM) as well as X-ray diffraction (XRD)  measurements as part of the results validation process.

 

Publicaciones Recientes:

103. A. Maurel, F. Lund and M. Montagnat, "Propagation of elastic waves through textured polycrystals: Application to ice"; submitted. 

102. F. Lund, "Normal modes and elastic properties of an elastic solid with line defects", Phys. Rev. B 91, 094102 (2015).

101. S. Giri, R. Inostroza-Rivera, B. Herrera, A. S. Núñez, F. Lund and A. Toro-Labbé, "The mechanism of Menshutkin reaction in gas and solvent phases from the perspective of reaction electronic flux", J. Molec Model., 20, 1 (2014).  

100. R. L. Castro, M. A. Fuenzalida, and F. Lund, "Experimental study of gravity flow under confined conditions", Int. J. Rock Mech. and Mining Sci. 67, 164 (2014).

 

99. S. Giri, F. Lund, A. Núñez, and A. Toro-Labbé, "Can Star-like C6Li6 be Treated as a Potential H2 Storage Material?", J. Phys. Chem. C 117, 5544 (2013).

 

98. S. Giri, E. Etchegaray, P. Ayers, A. Núñez, F. Lund and A. Toro-Labbé, "Insights into the Mechanism        of a SN2 Reaction from the Reaction Force and the Reaction Electronic Flux", J. Phys. Chem A 116, 10015 (2012).

 

 97. N. Mujica, M. T. Cerda, R. Espinoza, J. Lisoni and F. Lund, “Ultrasound as a probe of dislocation density in aluminum”. Acta Mater. 60,5828 (2012).

 

96. A. Maurel, F. Lund, V. Pagneux, and F. Barra, “Interaction of Elastic Waves with Dislocations”, MRS Proceedings, 1404, mrsf11-1404-w02-05 doi:10.1557/opl.2012.341. 

 

URL = {http://journals.cambridge.org/article_S1946427412003417}

 

95. F. Barra, F. Lund, N. Mujica and S. Rica, ”Shear modulus of an elastic solid under    external pressure: The case of helium”. Phys. Rev. B 85, 064103 (2012).

 

94. D. Asenjo, F. Lund, S. Poblete, R. Soto and M. Sotomayor, "Characterization of the Melting Transition in two Dimensions at Vanishing External Pressure Using Molecular Dynamics Simulations", Phys. Rev. B 83, 174110 (2011).

 

93. A. Maurel, V. Pagneux, F. Barra, and Lund, F., “Reply to Comment on Interaction of a Surface Wave with a dislocation”, Phys. Rev. B 80, 136102 (2009).

 

92. A. Maurel, V. Pagneux, F Barra, and Lund, F., “Surface acoustic waves in interaction with a dislocation”, Ultrasonics 50, 161 (2010).

 

91. N. Rodríguez, A. Maurel, V. Pagneux, F. Barra and F. Lund, “Interaction between elastic waves and prismatic dislocation loops”, J. Appl. Phys. 106, 054910 (2009).

 

90. F. Barra, A. Caru, M. T. Cerda, R. Espinoza, A. Jara, F. Lund and N. Mujica, “Measuring dislocation density in aluminum with resonant ultrasound spectroscopy”, Int. J. Bifurc. Chaos 19, 3561 (2009).

 

89. A. Maurel, V. Pagneux, F. Barra and F. Lund, “Ultrasound as a probe of plasticity? The interaction of elastic waves with dislocations” Int. J. Bifurc. Chaos 19, 2765 (2009).

88. P. Jeraldo, J. L. Arias, F. Lund, S. Maeckelberghe and D. Walgraef, “Towards a quantitative model of eggshell growth”, in Biomineralization: from Paleontology to Materials Science, edited by J. L. Arias and M. S. Fernández (Editorial Universitaria, 2007).

Proyectos Recientes:

ANR-CONICYT 38 "Wave propagation in complex media---PROCOMEDIA". Co-Investigator (Co-Directors: F. Barra and A. Maurel).  

FONDECYT 1100198 "Ultrasonic probing of dislocations in materials". Principal Investigator.

ACT 127 "Dynamics of disordered and heterogeneous media". Main Researcher (Director: N. Mujica).

FONDECYT 16060005 "Unidad de generación de negocios CIMAT". Director.

FONDECYT 17070002 "Apoyo a la investigación de biocompatibilización de nanopartículas metálicas mediante el uso de polímeros (CIMAT)". Director.  

FONDAP 11980002 "Center for advanced interdisciplinary research in materials---CIMAT". Director.

MECESUP UCH0205 "Red nacional de programas de doctorado en ciencias de materiales". Director.

FONDECYT 1990035 "Line defects in elastic solids: Dynamics and statistics". Principal Investigator. 


bottom

Departamento de Fisica algunos derechos Reservados.