Areas of expertise
- Soft Condensed Matter 020405
- Geophysics 0404
- Algebraic Structures In Mathematical Physics 010501
- Petroleum And Reservoir Engineering 091406
- Complex Physical Systems 029902
- Colloid And Surface Chemistry 030603
Research interests
- Effect of morphology and geometry on physical properties of microstructured porous media, micro-mechanics of granular materials.
- Rock physics and rock mechanics
- Granular dynamics
- Cellular solids and foams
- CO2 geosequestration
- Complex systems
- Soft condensed matter
Researcher's projects
"Rock Physics: A study of micromechanics of rocks and granulated materials."
Collaborators: Christoph Arns and Edward Garboczi.
Gant: ARC, DP0881458 2007
Current student projects
1. Mapping Forces in Granular Media
Have you ever wondered why we only leave footprints on wet beaches not on dry sand? Or why wet sand looks dry the moment you stand on it? Or have you thought about landslides and what triggers them? Or how a large assembly of cells can pile up and form a living tissue? Answering these simple questions requires a deep understanding of the kinematics and mechanics of granular materials. There have been many developments in understanding the nature of granular materials in recent years, but to date some questions are still topics for debate; questions such as the dynamics of the interaction between individual grains and the distribution of forces inside granular packings.
At the Department of Applied Mathematics at ANU, we have the necessary experimental aparatus and computing power combined with years of research experience in the field of granular materials to address some of the fundamental questions in this area. Students involved in this project will learn to design and perform experiments to understand the nature of forces in granular materials. Parallel to the experiments, students will learn common numerical techniques such as Molecular Dynamics and the Discrete Element Method to simulate packings of granular materials. These simulations will give us the flexibility of performing virtual experiments with controlled parameters to compare with real experiments and therefore validate the results.
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2. Structural Analysis of Metallic Foams
What do aeroplane wings, water filters, car floors and the 2008 Olympic Aquatic Centre have in common? They are all metallic foams in one way or another! Metal foams combine weight and strength advantages over solid metals, making them ideal materials for a variety of industrial applications. These distinctive properties of metal foams arise largely from the complex microstructure of the foams rather than the physical properties of the metal they are made of.
Thanks to the state of the art X-ray Computed Tomography facility at the Department of Applied Mathematics at the ANU, we are now able to access the internal structure of metallic foams non-intrusively. Tomography combined with the computing power of the supercomputer available to ANU researchers allows three-dimensional structural analysis of large complex materials such as metallic foams.
In this project, we aim to perform numerical analysis on existing experimental data acquired by our partner group in Germany. The experiments were carried out on closed-cell Aluminium foams tested in a uniaxial compression cell with lateral constraint. The foam samples were then imaged using X-ray CT to produce 3D digital datasets. Characterising the deformation of the foam based on cell shape/geometry is one of the main goals of this project. Also using Finite Element Methods (FEM), we will attempt to numerically predict the collapse of the metallic foams under compression.
In this project, students will learn to handle large complex structures and apply geometrical/topological calculations on them. Additionally students will gain knowldge of the Finite Element Method (FEM) which is an industry standard for structural analysis of materials.
Publications
- Herring, A, King, P, Saadatfar, M et al. 2021, '3D microstructure controls on mineral carbonation', Journal of CO2 Utilization, vol. 47, no. 101494.
- Rashed, M, Bhattacharyya, D, Mines, R et al. 2021, 'Enhancing the bond strength in the meta-crystal lattice of architected materials by harnessing the non-equilibrium solidification in metal additive manufacturing', Additive Manufacturing , vol. 37.
- Hazell, P, Wang, H, Lin, T et al. 2021, 'On the improvement of the ballistic performance of a silicon carbide tile through pre-stress: Experiments and simulations', International Journal of Impact Engineering, vol. 151.
- Kader, M, Hazell, P, Islam, M et al. 2021, 'Strain-rate dependency and impact dynamics of closed-cell aluminium foams', Materials Science and Engineering A, vol. 818, pp. 1-9.
- Oberst, S, Martin, R, Halkon, B et al. 2021, 'Submillimetre mechanistic designs of termite-built structures', Journal of the Royal Society Interface, vol. 18, no. 178, pp. 1-10.
- Islam, M, Kader, M, Hazell, P et al. 2020, 'Effects of impactor shape on the deformation and energy absorption of closed cell aluminium foams under low velocity impact', Materials and Design, vol. 191, no. 108599, pp. -.
- Kader, M, Brown, A, Hazell, P et al. 2020, 'Geometrical and topological evolution of a closed-cell aluminium foam subject to drop-weight impact: An X-ray tomography study', International Journal of Impact Engineering, vol. 139, no. 103510.
- Kader, M, Hazell, P, Brown, A et al. 2020, 'Novel design of closed-cell foam structures for property enhancement', Additive Manufacturing , vol. 31.
- Saadatfar, M, Brink, F, Latham, S et al. 2020, 'High resolution 3D mapping of grain kinematics during high temperature sequestration of SO2 from flue gas by carbonate aggregates', Scientific Reports, vol. 10.
- Parvanian, A, Salimijazi, H, Shabaninejad, M et al. 2020, 'Thermochemical CO2 splitting performance of perovskite coated porous ceramics', RSC Advances, vol. 10, no. 39, pp. 23049-23057.
- Mazloomi, M, Saadatfar, M & Evans, P 2020, 'Designing cricket bats using parametric modeling and genetic algorithms', Wood Science and Technology, vol. 54, pp. 755-768.
- Oberst, S, Lai, J, Martin, R et al. 2020, 'Revisiting stigmergy in light of multi-functional, biogenic, termite structures as communication channel', Computational and Structural Biotechnology Journal, vol. 18, pp. 2522-2534.
- Parvanian, A, Salimijazi, H, Shabaninejad, M et al. 2020, 'Ca/Al doped lanthanum manganite perovskite coated porous SiC for CO2 conversion', Materials Chemistry and Physics, vol. 253, no. 123306, pp. 1-7.
- Oren, P, Ruspini, L, Saadatfar, M et al 2019, 'In-situ pore-scale imaging and image-based modelling of capillary trapping for geological storage of CO2', International Journal of Greenhouse Gas Control, vol. 87, pp. 34-43.
- Lv, A, Ramandi, H, Masoumi, H et al 2019, 'Analytical and experimental investigation of pore pressure induced strain softening around boreholes', International Journal of Rock Mechanics and Minings Sciences, vol. 113, pp. 1-10.
- Brown, A, Walters, J, Zhang, Y et al 2019, 'The mechanical response of commercially available bone simulants for quasi-static and dynamic loading', Journal of the Mechanical Behavior of Biomedical Materials, vol. 90, pp. 404-416.
- Parvanian, A, Salimijazi, H, Fathi, M et al 2019, 'Synthesis and thermal shock evaluation of porous SiC ceramic foams for solar thermal applications', Journal of the American Ceramic Society, vol. 102, no. 4, pp. 2009-2020.
- Islam, M, Brown, A, Hazell, P et al 2018, 'Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading', International Journal of Impact Engineering, vol. 114, pp. 111-122.
- Kader, M, Islam, M, Brown, A et al 2017, 'Deformation Mechanisms of Closed Cell-Aluminium Foams During Drop Weight Impact', International Symposium on Characterization of Minerals, Metals, and Materials, 2017, ed. S Ikhmayies, Springer, Cham, Switzerland, pp. 233-239.
- Brown, A, Escobedo, J & Saadatfar, M 2017, 'Experimental Investigation of Mechanical Behaviour of Closed-Cell Aluminium Foams Under Drop Weight Impact', International Symposium on Characterization of Minerals, Metals, and Materials, 2017, ed. S Ikhmayies, Springer, Cham, Switzerland, pp. 225-232pp.
- Saadatfar, M, Takeuchi, H, Robins, V et al. 2017, 'Pore configuration landscape of granular crystallization', Nature Communications, vol. 8, pp. 15082-15082.
- Schaller, F, Punzmann, H, Schröder-Turk, G et al 2017, 'Towards minimal models for realistic granular materials: Tomographic analysis of bidispersed assemblies of ellipsoids', 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017, ed. Radjai F.Delenne J.Y, EPJ Web of Conferences , Montpelier, France, pp. 4pp.
- Madadi, M & Saadatfar, M 2017, 'A finite-element study of the influence of grain contacts on the elastic properties of unconsolidated sandstones', International Journal of Rock Mechanics and Minings Sciences, vol. 93, no. -, pp. 226-233.
- Karimpouli, S, Tahmasebi, P, Ramandi, H et al 2017, 'Stochastic modeling of coal fracture network by direct use of micro-computed tomography images', International Journal of Coal Geology, vol. 179, pp. 153-163pp.
- Kader, M, Islam, M, Hazell, P et al 2017, 'Numerical modelling of closed-cell aluminium foams under shock loading', 19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015, ed. R Ravelo, T Sewell, R Chau, T Germann, I I Oleynik and S Peiris, AIP Publishing LLC, Online, pp. 1-4pp.
- Islam, M, Kader, M, Hazell, P et al 2017, 'Dynamic Crushing Response of Closed-cell Aluminium Foams during Shock Loading', 19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015, ed. R Ravelo, T Sewell, R Chau, T Germann, I I Oleynik and S Peiris, AIP Publishing LLC, Online, pp. 1-5pp.
- Kader, M, Islam, M, Saadatfar, M et al 2017, 'Macro and micro collapse mechanisms of closed-cell aluminium foams during quasi-static compression', Materials and Design, vol. 118, pp. 11-21.
- Kader, M, Islam, M, Brown, A et al 2017, 'Deformation Mechanisms of Closed Cell-Aluminium Foams during Drop Weight Impact', in S Ikhmayies (ed.), Characterization of Minerals, Metals, and Materials 2017, Springer International Publishing AG, Cham, Switzerland, pp. 233-242.
- Islam, M, Kader, M, Brown, A et al 2017, 'Experimental Investigation of Mechanical Behaviour of Closed-Cell Aluminium Foams under Drop Weight Impact', in S Ikhmayies (ed.), Characterization of Minerals, Metals, and Materials 2017, Springer International Publishing AG, Cham, Switzerland, pp. 225-232pp.
- Saadatfar, M, Takeuchi, H, Hanifpour, M et al 2017, 'Granular compaction and the topology of pore deformation', 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017, ed. Radjai F.Delenne J.Y, EPJ Web of Conferences , Montpelier, France, pp. -.
- Ramandi, H, Mostaghimi, P, Armstrong, R et al 2016, 'Porosity and permeability characterization of coal: A micro-computed tomography study', International Journal of Coal Geology, vol. 154, pp. 57-68.
- Kader, M, Islam, M, Hazell, P et al 2016, 'Computational Modelling of Closed-Cell Aluminium Foams to Investigate Structural Deformation under Quasi-Static Loading', Applied Mechanics and Materials, vol. 846, pp. 133-138pp.
- Islam, M, Kader, M, Hazell, P et al 2016, 'Investigation of microstructural and mechanical properties of cell walls of closed-cell aluminium alloy foams', Materials Science and Engineering A, vol. 666, pp. 245-256.
- Robins, V, Saadatfar, M, Delgado-Friedrichs, O et al 2016, 'Percolating length scales from topological persistence analysis of micro-CT images of porous materials', Water Resources Research, vol. 52, no. 1, pp. 315-329.
- Kader, M, Islam, M, Hazell, P et al 2016, 'Modelling and characterization of cell collapse in aluminium foams during dynamic loading', International Journal of Impact Engineering, vol. 96, pp. 78-88.
- Schaller, F, Neudecker, M, Saadatfar, M et al 2015, 'Local Origin of Global Contact Numbers in Frictional Ellipsoid Packings', Physical Review Letters, vol. 114, no. 15, pp. 158001/1-5.
- Sufian, A, Russell, A, Whittle, A et al 2015, 'Pore shapes, volume distribution and orientations in monodisperse granular assemblies', Granular Matter, vol. 17, no. 6, pp. 727-742.
- Hanifpour, M, Francois, N, Robins, V et al 2015, 'Structural and mechanical features of the order-disorder transition in experimental hard-sphere packings', Physical Review E-Statistical, Nonlinear and Soft Matter Physics, vol. 91, no. 6.
- Schaller, F, Kapfer, S, Hilton, J et al 2015, 'Non-universal Voronoi cell shapes in amorphous ellipsoid packs', Europhysics Letters, vol. 111, no. 2.
- Ramandi, H, Armstrong, R, Mostaghimi, P et al 2015, 'X-ray micro-computed tomography imaging for coal characterization', SPE Asia Pacific Unconventional Resources Conference and Exhibition, Society of Petroleum Engineers (SPE), Kuala Lumpur, pp. 177017-MS-1-11.
- Parvanian, A, Saadatfar, M, Panjepour, M et al 2014, 'The effects of manufacturing parameters on geometrical and mechanical properties of copper foams produced by space holder technique', Materials and Design, vol. 53, no. January 2014, pp. 681-690.
- Hanifpour, M, Francois, N, Allaei, M et al. 2014, 'Mechanical characterization of partially crystallized sphere packings', Physical Review Letters, vol. 113, no. 14.
- Sheppard, A, Latham, S, Middleton, J et al. 2014, 'Techniques in helical scanning, dynamic imaging and image segmentation for improved quantitative analysis with X-ray micro-CT', Nuclear Instruments and Methods in Physics Research: Section B, vol. 324, pp. 49-56.
- Francois, N, Arnoux, T, Garcia, L et al 2014, 'Experimental investigation of the mechanical stiffness of periodic framework-patterned elastomers', Philosophical Transactions of the Royal Society Series A, vol. 372, no. 2008, p. 17.
- Sheppard, A, Kingston, A, Myers, G et al. 2013, 'New Methods in Helical Scanning, Dynamic Imaging and Image Segmentation for Improved Quantitative Analysis in Micro-CT', International Conference on Tomography of Materials and Structures (ICTMS 2013), ed. Veerle Cnudde, Ghent University, Ghent, Belgium, pp. 119-122.
- Schaller, F, Kapfer, S, Evans, M et al 2013, 'Set Voronoi diagrams of 3D assemblies of aspherical particles', Philosophical Magazine, vol. 93, no. 31-33, pp. 3993-4017.
- Hanifpour, M, Francois, N, Allaei, M et al 2013, 'DEM simulation of experimental dense granular packing', AIP Conference Proceedings, vol. 1542, no. 337, pp. 337-340.
- Schroeder-Turk, G, Schielein, R, Kapfer, S et al. 2013, 'Minkowski tensors and local structure metrics: Amorphous and crystalline sphere packings', AIP Conference Proceedings, vol. 1542, no. 349, pp. 349-352.
- Schaller, F, Neudecker, M, Saadatfar, M et al 2013, 'Tomographic analysis of jammed ellipsoid packings', AIP Conference Proceedings, vol. 1542, pp. 377-380.
- Francois, N, Saadatfar, M, Hanifpour, M et al 2013, 'Crystallisation in a granular material', AIP Conference Proceedings, vol. 1542, pp. 369-372.
- Saadatfar, M, Francois, N, Arad, A et al. 2013, 'Grain-based characterisation and acoustic wave propagation in a sand packing subject to triaxial compression', AIP Conference Proceedings, vol. 1542, no. 571, pp. 571-574.
- Francois, N, Saadatfar, M, Cruikshank, R et al 2013, 'Geometrical frustration in amorphous and partially crystallized packings of spheres', Physical Review Letters, vol. 111, no. 14, pp. -.
- Saadatfar, M, Francois, N, Arad, A et al. 2012, '3D mapping of deformation in an uncosolidated sand: a Micro mechanical study', Society of Exploration Geophysicists Annual Meeting (SEG 2012), Society of Exploration Geophysicists, USA, pp. 1-6.
- Saadatfar, M, Mukherjee, M, Madadi, M et al 2012, 'Structure and deformation correlation of closed-cell aluminium foam subject to uniaxial compression (vol 60, pg 3604, 2012)', Acta Materialia, vol. 60, no. 16, pp. 5944-5944.
- Saadatfar, M, Sheppard, A, Senden, T et al, 'Mapping forces in a 3D elastic assembly of grains', European Journal of Mechanics A - Solids, Volume 60, Issue 1, January 2012,
- Saadatfar, Mohammad, Nicolas Francois, Alon Arad, Mahyar Madadi, Ron Cruikshank, Mehdi Alizadeh, Adrian Sheppard et al. "3D mapping of deformation in an unconsolidated sand: A micro mechanical study." Image in 2 (2012): 3D. doi: 10.1190/segam2012-1263.1
- Saadatfar, M, Garcia-Moreno, F, Hutzler, S et al 2009, 'Imaging of metallic foams using X-ray micro-CT', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 344, pp. 107-112.
- Saadatfar, M 2009, 'Computer simulation of granular materials', Computing in Science & Engineering, vol. 11, no. 1, pp. 66-74.
- Saadatfar, M, Barry, J, Weaire, D et al 2008, 'Ordered cylindrical foam structures with internal bubbles', Philosophical Magazine Letters, vol. 88, no. 9-10, pp. 661-668.
- Hutzler, S, Saadatfar, M, van der Net, A et al 2008, 'The dynamics of a topological change in a system of soap films', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 323, no. 1-3, pp. 123-131.
- Schroder-Turk, G, Mickel, W, Schröter, M et al. 2010, 'Disordered spherical bead packs are anisotropic', Europhysics Letters, vol. 90, no. 3, pp. art. no. 34001.
- Saadatfar, M 2009 COMPUTER SIMULATION OF GRANULAR MATERIALS' 'Computing in Science & Engineering, vol 11, no. 1, pp. 66-74
- Saadatfar, M; Barry, J; Weaire, D; et al., 2008 'Ordered cylindrical foam structures with internal bubbles', Philosophical Magazine Letters Volume: 88 Issue: 9-10 Pages: 661-668
- Saadatfar, M; Garcia-Moreno, F; Hutzler, S; et al, 2009 'Imaging of metallic foams using X-ray micro-CT', Colloids and Surfaces a-Physicochemical and Engineering Aspects Volume: 344 Issue: 1-3 Pages: 107-112
- Hutzler, S; Saadatfar, M; van der Net, A; et al. 2008 'The dynamics of a topological change in a system of soap films' Colloids and Surfaces a-Physicochemical and Engineering Aspects Volume: 323 Issue: 1-3 Pages: 123-131
- Jenkins, M, Schroter, M, Swinney, H et al. 2008, 'Onset of mechanical stability in random packings of frictional spheres.', Physical Review Letters, vol. 101, no. 1, p. 018301.
- Aste PhD, T, Di Matteo PhD, T, Saadatfar, M et al. 2007, 'An invariant distribution in static granular media', Europhysics Letters, vol. 79, no. 2, p. 24003.
- Weaire, D, Langlois, V, Saadatfar, M et al 2007, 'Foam as granular matter', in T. Aste, T Di Matteo, A Tordesillas (ed.), Granular and Complex Materials volume 8, World Scientific Publishing Company, Singapore, pp. 1-26.
- Saadatfar, M, Sheppard, A & Knackstedt, M 2006, 'Grain partitioning and its applications', in Jacques Desrues, Gioacchino Viggiani & Pierre Besuelle (ed.), Advances in X-ray tomography for geomaterials, ISTE Publishing Knowledge, London, pp. 269-276.
- Saadatfar, M, Sheppard, A & Knackstedt, M 2006, 'Grain partitioning and its applications', International Workshop on X-Ray for GeoMaterials (GeoX 2006), ed. ISTE Ltd, ISTE Publishing Knowledge, France, p. 8.
- Sheppard, A, Arns PhD, C, Sakellariou, A et al. 2006, 'Quantitative properties of complex porous materials calculated from X-ray CT images', Proceedings of SPIE - Progress in Biomedical Optics and Imaging, vol. 7, no. 38, pp. 631811/1-15.
- Aste PhD, T, Saadatfar, M & Senden, T 2006, 'Local and global relations between the number of contacts and density in monodisperse sphere packs', Journal of Statistical Mechanics: Theory and Experiment, pp. 1-10.
- Arns PhD, C, Sheppard, A, Saadatfar, M et al. 2006, 'Predication of permeability from NRM response: surface relaxivity heterogeneity', Annual Logging Symposium of the Society of Petrophysicists & Well Log Analysts (SPWLA 2006), Society of Petrophysicists and Well Log Analysts (SPWLA), USA.
- Knackstedt, M, Arns PhD, C, Saadatfar, M et al. 2006, 'Elastic and transport properties of cellular solids derived from three-dimensional tomographic images', Proceedings of the Royal Society of London Series A: Mathematical, Physical and Engineering Sciences, vol. 462, no. 2073, pp. 2833-2862.
- Arns PhD, C, Sheppard, A, Saadatfar, M et al. 2018, 'Prediction of permeability from NMR response: Surface relaxivity heterogeneity', SPWLA 47th Annual Logging Symposium 2006, Society of Petrophysicists and Well Log Analysts (SPWLA), TBC, pp. -.
- Bauget, F, Turner, M, Arns PhD, C et al. 2005, 'Rock Typing and Petrophysical property estimation via direct analysis on microtomographic images', International Symposium of the Society of Core Analysts 2005, Society of Core Analysts, USA, pp. 1-12.
- Bauget, F, Turner, M, Arns PhD, C et al. 2005, 'Towards modelling regolith permeability with high resolution X-ray tomography', International Petroleum Conference and Exhibition (Petrotech-2005), Society of Petroleum Engineers, USA.
- Saadatfar, M, Arns PhD, C, Knackstedt, M et al. 2005, 'Mechanical and transport properties of polymeric foams derived from 3D images', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 263, pp. 284-289.
- Saadatfar, M, Turner, M, Arns PhD, C et al. 2005, 'Rock Fabric and Texture from Digital Core Analysis', Society of Petrophysicists and Well Log Analysts Annual Symposium 2005, ed. Conference Program Committee, Society of Petrophysicists and Well Log Analysts (SPWLA), United States, pp. ZZ1-16.
- Aste PhD, T, Saadatfar, M & Senden, T 2005, 'Geometrical structure of disordered sphere packings', Physical Review E-Statistical, Nonlinear and Soft Matter Physics, vol. 71, pp. 061302-1-15.
- Saadatfar, M, Kabla, A, Senden, T et al. 2005, 'The geometry and the number of contacts on monodisperse sphere packs using X-ray tomography', International Conference on Micromechanics of Granular Media (Powders & Grains 2005), ed. R.GarcÃa-Rojo, H.J. Herrmann & S. McNamara, A A Balkema, Stuttgart, Germany, pp. 33-36.
- Knackstedt, M, Arns PhD, C, Saadatfar, M et al. 2005, 'Virtual Materials Design: Properties of Cellular Solids Derived from 3D Tomographic Images', Advanced Engineering Materials, vol. 7, no. 4, pp. 238-243.
- Saadatfar, M, Knackstedt, M, Arns PhD, C et al. 2004, 'Polymeric Foam Properties Derived from 3D Images', Physica A: Statistical mechanics and its applications, vol. 339, pp. 131-136.
- Aste PhD, T, Saadatfar, M, Sakellariou, A et al. 2004, 'Investigating the Geometrical Structure of Disordered Sphere Packings', Physica A: Statistical mechanics and its applications, vol. 339, pp. 16-23.
- Sakellariou, A, Senden, T, Sawkins, T et al. 2004, 'An x-ray tomography facility for quantitative prediction of mechanical and transport properties in geological, biological and synthetic systems', International Society for Optical Engineering Conference 2004, ed. Ulrich Bonse, SPIE - The International Society for Optical Engineering, USA.
- Saadatfar, M & Sahimi, M 2002, 'Diffusion in Disordered Media with Long-Range Correlations: Anomalous, Fickian, and Superdiffusive Transport and Log-Periodic Oscillations', Physical Review E-Statistical, Nonlinear and Soft Matter Physics, vol. 65, pp. 036116-1-036116-8.
Projects and Grants
Grants information is drawn from ARIES. To add or update Projects or Grants information please contact your College Research Office.
- Dual-ion electrochemical systems (Secondary Investigator)
- ARC Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (Secondary Investigator)
- Multiscale Flooding Dynamics of Otway (DCA) - Project Phase 1 (Secondary Investigator)
- Study on 3D characterisation of permeability reduction with overburden stress (Primary Investigator)
- Rock Physics: A study of micromechanics of rocks and granulated materials (Secondary Investigator)