Javier Llorca

Catedrático de Universidad
Departamento de Ciencia de Materiales
Universidad Politécnica de Madrid
E. T. S. de Ingenieros de Caminos Canales y Puertos
C/ Profesor Aranguren s/n
28040 Madrid, España
Tel: (91) 549 34 22
Fax: (91) 550 30 47
javier.llorca@upm.es

Teaching activities

• Composite Materials (third year, Materials Engineering)
• Simulation in Materials Science and Engineering (third year, Materials Engineering)
• Structural Composites (Doctorate)
• Mechanics of Composite Materials (Doctorate)

Profile

Prof. Javier LLorca graduated in Civil Engineering at the Polytechnic University of Madrid in 1983. He got his Ph. D. in Materials Science at the same institution in 1986 and was appointed Associate Professor in the Department of Materials Science in 1987 and Professor in 1995. Since 2007, he is director of the Madrid Institute for Advanced Studies in Materials and head of the research group on "Advanced Structural Materials and Nanomaterials" at the Polytechnic University of Madrid.

His research activities have been focused in the systematic application of computational tools (molecular dynamics, dislocation dynamics, crystal plasticity, computational micromechanics, homogenization theory, etc.) and multiscale modeling strategies (in the range nm to m) to establish the link between the microstructure and the macroscopic mechanical behavior of materials. A key feature of his contributions is the use of novel experimental techniques to determine the properties of the phases and interfaces in the material at the microscopic level. So, simulations are fed with experimental values independently obtained and are free of "adjusting" parameters.

These new multiscale modeling strategies were initially applied to composites (metal-, ceramic- and polymer-matrix composites) and some of his contributions in this area are classics within the scientific community. Moreover, they were expanded to a wide range of engineering materials (including metallic alloys, ceramics, amorphous and crystalline polymers, high performance fibers and biological materials). Finally, these tools have become the foundation of the modern techniques of virtual testing, which are starting to be used by the aerospace industry to minimize the number of costly mechanical tests to characterize and certify composite materials.

These activities were carried out within the framework of more than 51 research projects (28 as principal investigator) funded by the Spanish national and regional research programs on materials and through contracts with international institutions (European Union, NATO, European Fusion Development Agreement, National Science Foundation of the US) as well as industries (Airbus, Industria de Turbopropulsores, Gamesa, Acciona, Future Fibres, Antolín, Inespal, etc.).

Prof. LLorca, a Fulbright scholar, is a Fellow of the European Mechanics Society. He currently holds the Prof. Brahm Prakash Visiting Professorship, India Institute of Science and is a Guest Professor of Shanghai Jiao-Tong University and has held visiting positions at Brown and Cornell Universities. He has received numerous awards, including the Research Award from the Spanish Royal Academy of Sciences, the Research award from the Polytechnic University of Madrid and the Gold Medal from the Spanish Structural Integrity Society. He is currently Associate Editor of Modelling and Simulation in Materials Science and Engineering, Composites Science and Technology, Materials Science and Engineering A, and International Journal of Engineering Sciences. In the framework of his research activities, he has co-authored over 160 research papers in international peer-reviewed journals, holds an h index of 36, and has given more than one hundred invited talks at national and international conferences and research centers throughout the world.

Recent relevant publications

M. Rodriguez, J. M. Molina-Aldareguía, C. González, J. LLorca. A methodology to measure the interface shear strength by means of the fiber push-in test. Composites Science and Technology, 72, 1924-1932, 2012.

R. Soler, J. M. Molina-Aldareguía, J. Segurado, J. LLorca. Effect of misorientation on the compression of highly anisotropic single-crystal micropillars. Advanced Engineering Materials, 14, 1004-1008, 2012.

S. Lotfian, J. M. Molina-Aldareguía, K. E. Yazzie, J. LLorca, N. Chawla. High temperature nanoindentation behavior of Al/SiC multilayers. Philosophical Magazine Letters, 92, 362-367, 2012.

L. P. Canal, C. González, J. M. Molina-Aldareguía, J. Segurado, J. LLorca. Application of digital image correlation at the microscale in fiber-reinforced composites. Composites A, 43, 1630-1638, 2012.

J. J. Williams, J. Segurado, J. LLorca, N. Chawla. Three dimensional (3D) microstructure-based modeling of interfacial decohesion in particle reinforced metal matrix composites. Materials Science and Engineering A, 557, 113–118, 2012.

M. Rodríguez, J. M. Molina-Aldareguía, C. González, J. LLorca. Determination of the mechanical properties of amorphous materials through instrumented nanoindentation. Acta Materialia, 60, 3953-3964, 2012.

R. Soler, J. M. Molina-Aldareguía, J. Segurado, J. LLorca, R. I. Merino, V. M. Orera. Micropillar compression of LiF [111] single crystals: effect of size, ion irradiation and misorientation. International Journal of Plasticity, 36, 50-63, 2012.

L. P. Canal, C. González, J. Segurado, J. LLorca. Intraply fracture of fiber-reinforced composites: microscopic mechanisms and modeling. Composites Science and Technology, 72, 1223–1232, 2012.

A. Ridruejo, C. González, J. LLorca. A constitutive model for the in-plane mechanical behavior of nonwoven fabrics. International Journal of Solids and Structures, 49, 2215–2229, 2012.

J. Segurado, R. A. Lebensohn, J. LLorca, C. Tomé. Multiscale modeling of plasticity based on embedding the viscoplastic self-consistent formulation in implicit finite elements. International Journal of Plasticity, 28, 124-140, 2012.

O. López-Pamies, J. Moraleda, J. Segurado, J. LLorca. On the extremal properties of Hashin's hollow cylinder assemblage in nonlinear elasticity. Journal of Elasticity, 107, 1-10, 2012.

F. Sket, R. Seltzer, J. M. Molina-Aldareguía, C. González, J. LLorca. Determination of damage micromechanisms and fracture resistance of glass fiber/epoxy cross-ply laminate by means of X-ray computed microtomography. Composites Science and Technology, 72, 350–359, 2012.

S. Milenkovic, I. Sabirov, J. LLorca. Effect of the cooling rate on the microstructure and hardness of MAR-M247 Ni-based superalloy. Materials Letters, 72, 216–219, 2012.

C. Boehlert, Z. Chen, I. Gutiérrez-Urrutia, J. LLorca, M. T. Pérez-Prado. In-situ analysis of the tensile and tensile-creep deformation mechanisms in rolled AZ31. Acta Materialia, 60, 1889-1904, 2012.

R. Muñoz-Moreno, C. J. Boehlert, M. T. Pérez-Prado, E. M. Ruiz-Navas, J. LLorca. In situ observations of the deformation behavior and fracture mechanisms of Ti-45Al-2Nb-2Mn + 0.8 vol pct TiB2. Metallurgical and Materials Transactions, 43A, 1198-2018, 2012.

J. LLorca, C. González, J. M. Molina-Aldareguía, J. Segurado, R. Seltzer, F. Sket, M. Rodríguez, S. Sádaba, R. Muñoz, L. P. Canal. Multiscale modeling of composite materials: a roadmap towards virtual testing. Advanced Materials, 23, 5130-5147, 2011.

S. Hernández, F. Sket, J. M. Molina-Aldareguía, C. González, J. LLorca. Effect of curing cycle on void distribution and interlaminar shear strength in polymer-matrix composites. Composites Science and Technology, 71, 1331–1341, 2011.

J. M. Molina-Aldareguía, M. Rodríguez, C. González, J. LLorca. An experimental and numerical study of the influence of local effects on the application of the fibre push-in test. Philosophical Magazine, 91, 1293-1307, 2011.

A. Ridruejo, C. González, J. LLorca. Micromechanisms of deformation and fracture of polypropylene nonwoven fabrics. International Journal of Solids and Structures, 48, 153-162, 2011.

A. Ridruejo, C. González, J. LLorca. Damage micromechanisms and notch sensitivity of glass-fiber non-woven felts: an experimental and numerical study. Journal of the Mechanics and Physics of Solids, 58, 1628-1645, 2010.

J. Segurado, J. LLorca. Discrete Dislocation Dynamics Analysis of the Effect of Lattice Orientation on Void Growth in Single Crystals. International Journal of Plasticity, 26, 806-819, 2010.

A. Mortensen, J. LLorca. Metal Matrix Composites. Annual Review of Materials Research, 40, 243-270, 2010.

E. Totry, J. M. Molina-Aldareguia, C. González, J. LLorca. Effect of fiber, matrix and interface properties on the in-plane shear deformation of carbon-fiber reinforced composites. Composites Science and Technology, 70, 970-980, 2010.

J. Moraleda, J. Segurado, J. LLorca. Finite Deformation of Incompressible Fiber-Reinforced Elastomers: A Computational Micromechanics Approach. Journal of the Mechanics and Physics of Solids, 57, 1596-1613, 2009.

E. Totry, C. González, J. LLorca, J. Molina-Aldareguía. Mechanisms of Shear Deformation in Fiber-Reinforced Polymers: Experiments and Simulations. International Journal of Fracture, 158, 197-209, 2009.

M. V. Aguirre, A. Martín, J. Y. Pastor, J. Llorca, M. A. Monge, R. Pareja, Mechanical Behavior of W-Y2O3 and W-Ti Alloys from 25ºC to 1000ºC. Metallurgical and Materials Transactions A, 40, 2283-2290, 2009.

J. Segurado, J. LLorca. An Analysis of the Size Effect on Void Growth in Single Crystals using Discrete Dislocation Dynamics. Acta Materialia, 57, 1427-1436, 2009.

L. P. Canal, J. Segurado, J. LLorca. Failure Surface of Epoxy-Modified Fiber-Reinforced Composites Under Transverse Tension and Shear.  International Journal of Solids and Structures, 46, 2265–2274, 2009.

T. E. Wilkes, J. Y. Pastor, J. LLorca, K. T. Faber.  Mechanical Properties of Wood-Derived Silicon Carbide Aluminum-Silicon- Magnesium Composites as a Function of Temperature. Journal of Materials Research. 23, 1732-1743, 2008.

J. Y. Pastor, J. LLorca, A. Martín, J. I. Peña, P. B Oliete. Fracture Toughness and Strength of Al2O3-Y3Al5O12 and Al2O3-Y3Al5O12-ZrO2 Directionally-Solidified Eutetic Oxides up to 1900K. Journal of the European Ceramic Society, 28, 2345-2351, 2008.

E. Totry, C. González, J. LLorca. Prediction of the Failure Locus of C/PEEK Composites under Transverse Compression and Longitudinal Shear Through Computational Micromechanics. Composites Science and Technology, 68, 3128-3136, 2008.

F. J. Ester, R. I. Merino, J. Y. Pastor, A. Martín, J. LLorca. Surface Modification of Al2O3–ZrO2(Y2O3) Eutectics Oxides by Laser Melting: Processing and Wear Resistance. Journal of the American Ceramic Society, 91, 3552-3559, 2008.

I. Romero, J. Segurado, J. LLorca. Dislocation Dynamics in Non-convex Domains using Finite Elements with Embedded Discontinuities. Modelling and Simulation in Materials Science and Engineering, 16, 035008, 2008.

E. Totry, C. González, J. LLorca. Influence of the Loading Path on the Strength of Fiber-Reinforced Composites Subjected to Transverse Compression and Shear. International Journal of Solids and Structures, 45, 1663-1675, 2008.

E. Totry, C. González, J. LLorca. Failure locus of fiber-reinforced composites under transverse compression and out-of-plane shear. Composites Science and Technology, 68, 829-839, 2008.

J. Moraleda, J. Segurado, J. LLorca. Finite Deformation of Porous Elastomers: A Computational Micromechanics Approach. Philosophical Magazine, 87, 5607-5627, 2007.

O. Pierard, C. González, J. Segurado, J. Llorca, I. Doghri. Micromechanics of Elasto-plastic Materials Reinforced with Ellipsoidal Inclusions. International Journal of Solids and Structures, 44,  6945-6962, 2007.

J. F. Bartolomé, A. H. de Aza, A. Martin, J. Y. Pastor, J. LLorca, R. Torrecillas, G. Bruno. Alumina/Zirconia Micro/nanocomposites, a New Material for Biomedical Applications with Superior Sliding Wear Resistance. Journal of the American Ceramic Society, 90, 3177-3184, 2007.

C. González, J. LLorca. Mechanical Behavior of Unidirectional Fiber-Reinforced Polymers under Transverse Compression: Microscopic Mechanisms and Modeling. Composites Science and Technology, 67, 2795-2806, 2007.

P. B. Oliete, J. I. Peña, A. Larrea, V. M. Orera, J. LLorca, J. Y. Pastor, A. Martín, J. Segurado. Ultra-High Strength Nanofibrillar Al2O3-YAG-YSZ Eutectics Advanced Materials, 19, 2313-2318, 2007.

J. Segurado, J. LLorca, I. Romero. Computational Issues in the Simulation of Two-dimensional Discrete Dislocation Dynamics. Modelling and Simulation in Materials Science and Engineering, 15, S361-S375, 2007.

E. Arévalo, C. González, F. Gálvez, J. LLorca. Modelling Low Velocity Impact in C/epoxy Laminates. 23rd International Symposium on Ballistics, (F. Gálvez and V. Sánchez-Gálvez, Eds.), vol. 2, pp. 1123-1132, 2007.

C. González, J. LLorca. Numerical Simulation of the Fracture Behavior of Ti/SiC Composites Between 20ºC and 400ºC. Metallurgical and Materials Transactions, 38A, 169-179, 2007.

O. Pierard, J. LLorca, J. Segurado, I. Doghri. Micromechanics of Particle-reinforced Elasto-viscoplastic Composites: Finite Element Simulations Versus affine Homogenization. International Journal of Plasticity, 23 , 1041-1060, 2007.

C. González, J. LLorca. Virtual Fracture Testing of Fiber-reinforced Composites: A Computational Micromechanics Approach. Engineering Fracture Mechanics, 74, 1126-1138, 2007.

J. I. Peña, M. Larsson, R. I. Merino, I. de Francisco, V. M. Orera, J. LLorca, J. Y. Pastor, A. Martín, J. Segurado. Processing, Microstructure and Mechanical properties of directionally-solidified Al2O3-Y3Al5O12-ZrO2 ternary eutectics. Journal of the European Ceramic Society, 26, 3113-3121, 2006.

C. González, J. LLorca. Multiscale Modeling of Fracture in Fiber-reinforced Composites. Acta Materialia, 54, 4171-4181, 2006.

J. Llorca, V. Orera. Directionally-Solidified Eutectic Ceramic Oxides. Progress in Materials Science, 51, 711-809, 2006.

J. Y. Pastor, J. Llorca, P. Poza, J. J. Quispe, A. R. de Arellano, J. Martínez-Fernández, A. Sayir, V. M. Orera. High Temperature Tensile Strength of Er2O3-doped ZrO2 Single Crystals. Journal of the American Ceramic Society, 89, 2140-2146, 2006.

J. Segurado, J. Llorca. Computational Micromechanics of Composites: The Effect of Particle Spatial Distribution. Mechanics of Materials, 38, 873-883, 2006.

J. Martínez-Fernández, A. R. Pinto Gómez, J. J. Quispe Cancapa, A. R. de Arellano, J. LLorca, J. Y. Pastor, S. C. Farmer, A. Sayir. High Temperature Plastic Deformation of Er2O3-doped ZrO2 Single Crystals. Acta Materialia, 54, 2195-2204, 2006.

A.Ridruejo, J. Y. Pastor, J. Llorca, A. Sayir, V. M. Orera. Stress Corrossion Cracking of Single-Crystal Tetragonal ZrO2(Er2O3). Journal of the American Ceramic Society, 88, 3125-3130, 2005.

J. Segurado, J. Llorca. A Computational Micromechanics Study of the Effect of Interface Decohesion on the Mechanical Behavior of Composites. Acta Materialia, 53, 4931-4942, 2005.

J. Y. Pastor, J. Llorca, A. Salazar, P. B. Oliete, I de Francisco, J. I. Peña. Mechanical Properties of Melt-Grown Alumina-YAG Eutectics up to 1900K. Journal of the American Ceramic Society, 88, 1488-1495, 2005.

J. Y. Pastor, J. Llorca, P. Poza, I. de Francisco, R. I. Merino, J. I. Peña. Mechanical properties of melt-grown Al2O3-ZrO2(Y2O3) eutectics with different microstructure. Journal of the European Ceramic Society, 25, 1215-1223, 2005.

C. González, J. Llorca. Stiffness of a Curved Beam Subjected to Axial Load and Large Displacements. International Journal of Solids and Structures, 42, 1537-1545, 2005.

C. González, J. LLorca, A. Weck. Toughness of Fiber-Reinforced Titanium as a Function of Temperature: Experimental Results and Micromechanical Modelling. Acta Materialia, 52, 3929-3939, 2004.

A. Salazar, J. Y. Pastor, J. LLorca. Fatigue Behavior of Multifilamentary BSCCO 2223/Ag Superconducting Tapes. IEEE Transactions on Applied Superconductivity, 14, 1841-1847, 2004.

C. González,, J. Segurado, J. LLorca. Numerical Simulation of Elasto-plastic Deformation of Composites: Evolution of Stress Microfields and Implications for Homogenization Models. Journal of the Mechanics and Physics of Solids, 52, 1573-1593, 2004.

J. LLorca, J. Segurado. Three-dimensional Multiparticle Cell Simulations of Deformation and Damage in Sphere-reinforced Composites. Materials Science and Engineering A365, 267-274, 2004.

J. LLorca, J. Y. Pastor, P. Poza, J. I. Peña, I. de Francisco, A. Larrea, V. M. Orera. Influence of the Y2O3 Content and Temperature on the Mechanical Properties of Melt-Grown Al2O3-ZrO2 Eutectics. Journal of the American Ceramic Society, 87, 633-639, 2004.

J. Segurado, J. LLorca. A New Three-Dimensional Interface Finite Element to Simulate Fracture in Composites. International Journal of Solids and Structures, 41, 2977-2993, 2004.

J. Segurado, C. González, J. LLorca. A Numerical Investigation of the Effect of Particle Clustering on the Mechanical Properties of Composites. Acta Materialia, 51, 2355-2369, 2003.

C. González, J. LLorca. A Numerical Model to Simulate the Deformation and Fracture of Polyethylene Fibers. Modelling and Simulation in Materials Science and Engineering, 11, 349-364, 2003.

N. Harlan, R. I. Merino, J. I. Peña, A. Larrea, V. Orera, C. González, P. Poza, J. LLorca. Phase distribution and Residual Stresses in Melt-Grown Al2O3-ZrO2(Y2O3) Eutectics. Journal of the American Ceramic Society, 85, 2025-2032, 2002.

J. Segurado, J. LLorca. A Numerical Approximation to the Elastic Properties of Sphere-Reinforced Composites. Journal of the Mechanics and Physics of Solids, 50, 2107-2121, 2002.

J. Segurado, J. LLorca, C. González. On the Accuracy of Mean-field Approaches to Simulate the Plastic Deformation of Composites. Scripta Materialia, 46, 525-529, 2002.

P. Poza, J. Pérez-Rigueiro, M. Elices, J. LLorca. Fractographic Analysis of Silkworm and Spider Silk. Engineering Fracture Mechanics, 69, 1035-1048, 2002.

J. LLorca. Fatigue of Particle and Whisker-Reinforced Metal-Matrix Composites. Progress in Materials Science, 47, 283-353, 2002.

C. González, J. LLorca. Micromechanical Modelling of Deformation and Failure in Ti-6Al-4V / SiC Composites.Acta Materialia, 49, 3505-3519, 2001.

J. Pérez-Rigueiro, M. Elices, J. LLorca, C. Viney. Tensile Properties of Argiope Trifasciata Drag Line Silk Obtained from the Spider's Web. Journal of Applied Polymer Science, 82, 2245-2251, 2001.

F. Gálvez, P. Poza, C. González, J. LLorca. Effect of Strain Rate on the Tensile Deformation of Ti-6Al-4V / SiC Composites.Scripta Materialia, 44, 2667-2671, 2001.

J. Y. Pastor, P. Poza, J. LLorca, J. I. Peña, R. I. Merino, V. M. Orera. Mechanical Properties of Directionally-Solidified Al2O3-ZrO2(Y2O3) Eutectics. Materials Science and Engineering, A308, 241-249, 2001.

J. A. Pardo, R. I. Merino, V. M. Orera, J. I. Peña, C. González, J. Y.Pastor, J. LLorca. Piezospectroscopic Study of Residual Stresses in Al2O3-ZrO2 Eutectic Crystals. Journal of the American Ceramic Society, 83, 2745-2752, 2000.

J. Rodríguez, A. Martín, J. LLorca. Modeling the Effect of Temperature on the Wear Resistance of Metals Reinforced with Ceramic Particles. Acta Materialia, 48, 993-1003, 2000.

C. González, J. LLorca. A Self-Consistent Approach to the Elasto-Plastic Behaviour of Two-Phase Materials Including Damage. Journal of the Mechanics and Physics of Solids, 48, 675-692, 2000.

J. Y. Pastor, P. Poza, J. LLorca. Mechanical Properties of Textured Bi2Sr2CaCu2O8+d High Temperature Superconductors. Journal of the American Ceramic Society, 82, 3139-3144, 1999.

P. Poza, J. LLorca. Mechanical Behaviour of Al-Li/SiC Composites. Part I: Microstructure and Tensile Deformation. Metallurgical and Materials Transactions 30A, 845-855, 1999.

P. Poza, J. LLorca. Mechanical Behaviour of Al-Li/SiC Composites. Part II: Cyclic Deformation. Metallurgical and Materials Transactions 30A, 857-867, 1999.

P. Poza, J. LLorca. Mechanical Behaviour of Al-Li/SiC Composites. Part III: Micromechanical Modeling. Metallurgical and Materials Transactions 30A, 869-878, 1999.

J. LLorca, M. Elices, J. A. Celemín. Toughness and Microstructural Degradation at High Temperature in SiC Fiber-Reinforced Ceramics. Acta Materialia, 46, 2441-2453, 1998.

J. LLorca, C. González. Microstructural Factors Controlling the Strength and Ductility of Particle-Reinforced Metal-Matrix Composites. Journal of the Mechanics and Physics of Solids, 46, pp. 1-28, 1998