Professor Ghatu Subhash
ME-EM Department Michigan Technological University, Houghton, MI,  49931, USA,  Ph: 1-906-487-3161,  Fax: 1-906-487-2822,  Email: subhash@mtu.edu

 

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Research

Publications

Awards

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PUBLICATIONS:


Books
      "Deformation, Fracture and Failure of Advanced Materials" special issue of Mechanics of Materials on Sia Nemat-Nasser 65th Anniversary, Editors: H. Espinosa and G. Subhash, Vol 35 [3-6] (2003)

Patents

  1. G. Subhash, A. Chandra and B.J. Koeppel, “Apparatus and Method for Determining the Dynamic Indentation Hardness of Materials,” Patent No. 6343502, Issued on 2/5/02
  2. M.D. Tervo, G. Subhash, Steve Dyk, Brian Kuykendall,Ryan Doyle, Eric Maddock, Swee Eng, “Road Surface and Subsurface Temperature Sensor” (pending)
  3. Qunli Liu and G. Subhash, ” An iterative deconvolution algorithm for system identification” Invention disclosure filed on Feb 15, 2003

Peer-Reviewed Journal Publications

  1. G. Subhash, S. Yao and M. Gretz, “Characterization of diatom frustules using nanoindentation” Journal of Nanoscience and Nanotechnology (in Press, 2004)
  2. Q. Liu and G. Subhash, "A phenomenological constitutive model for polymer foams under large deformations" Polymer Engineering and Science  Vol.44, pp.463–473, (2004).
  3. G. Subhash and Q. Liu, “Crushability maps for structural polymeric foams under uniaxial loading in rigid confinement” Experimental Mechanics (in Press, 2004).
  4. M. Imaninejad, G. Subhash and A. Loukus, "Experimental and numerical investigation of free-bulge formation during hydroforming of aluminum extrusions” Journal of Materials Processing Technology, Vol. 147/2, pp. 247-254 (2004).
  5. G. Subhash and W. Zhang, “Finite Element Analysis of Brittle Cracking due to Single Grit Rotating Scratch” Journal of Applied Mechanics, Vol.70, pp.147-151 (2003).
  6. C.Y. Huang and G. Subhash, "Influence of lateral confinement on dynamic damage evolution during uniaxial compressive response of brittle solids" Journal of Mechanics and Physics of Solids, 51/6 pp.1089-1105 (2003)
  7. B. Altan and G. Subhash "A Novel Averaging scheme for heterogeneous nanostructured materials" Mechanics of Materials 35/3-6, pp.281-294 (2003).
  8. W. Zhang and G. Subhash, "Damage zone interaction due to non-oriented Vickers indentations on brittle materials" J. Mater. Sci. Vol. 38(6), 1185-1194 (2003).
  9. H. Zhang, G. Subhash, L. J. Kecskes and R. J. Dowding “Mechanical Behavior of Bulk (ZrHf)TiCuNiAl Amorphous Alloys” Scripta Materialia ,Vol 49/5 pp 447-452 (2003).
  10. H. Li, G. Subhash, R. J. Dowding L. J. Kecskes, and X-L.Gao "Negative rate sensitivity of fracture strength in Bulk (ZrHf) TiCuNiAl Amorphous Alloys" Scripta Materialia, Vol. 49/11 pp. 1087-1092 (2003).
  11. H. Wang and G. Subhash, "Mechanics of mixed-mode ductile material removal with a conical tool and the size dependency of specific energy" J. of Mechanics and Physics of Solids Vol. 50/6 pp. 1269-1291 (2002).
  12. G. Subhash, J. E. Loukus and S. M. Pandit "Application of data dependent systems approach for evaluation of fracture modes during a single-grit scratching" Mechanics of Materials Vol 34/1, pp 25-42, (2002).
  13. G. Subhash and W. Zhang, "Investigation of the overall friction coefficient in single-pass scratch test" Wear, Vol 252/1-2, 125-136 (2002).
  14. C. Huang, G. Subhash and S. Vitton, “A micromechanical Damage Model for Uniaxial Compressive Failure Behavior of Rocks” Mechanics of Materials, Vol. 34/5 pp. 267-277 (2002)
  15. H. Wang and G. Subhash, "An approximate upper bound approach for the single-grit rotating scratch with a conical tool on pure metal” Wear, Vol. 252/11-12, pp. 911-933, (2002).
  16. G. Subhash, R. J. Dowding and L. J. Kecskes“Characterization of Uniaxial Compressive Response of A Bulk Amorphous Zr-Ti- Cu-Ni-Be Alloy” Materials Science and Engineering A, Vol 334[1-2] pp 33-40 (2002).
  17. W. Zhang and G. Subhash, “An elastic-plastic-cracking model for finite element analysis of indentation cracking in brittle materials,” International Journal of Solids and Structures, Vol 38/34-35, pp 5893-5913, (2001).
  18. W. Zhang and G. Subhash, “Finite element analysis of interacting indentations on brittle materials” Acta Materialia, Vol 49/15, 2961-2974, ( 2001)
  19. H. Wang, G. Subhash and A. Chandra, "Analysis of Single Grit Scraching of Rotating Pendulum on Pure Titanium" Wear, Vol 249/7, pp 566-581 (2001).
  20. G. Subhash, S. Sulibhavi, and M.A. Zikry, ""Influence of strain rate on the uniaxial compressive behaviour of 2-D braided textile composites" Composites: Part A Vol 32/11, pp 1583-1591 (2001).
  21. A. Chandra, G. Fu, S.Guha, G. Subhash, "A Plasticity Based Model of Material Removal During Chemical Mechanical Polishing," IEEE Trans. Semiconductor Manufacturing. Vol. 14[4] 406-417 (2001)
  22. R.J. Anton and G. Subhash, "Dynamic Vickers Indentation of Brittle Materials" Wear, Vol. 239, 27-35, (2000).
    G. Subhash, "Dynamic Indentation Testing" ASM Handbook, Mechanical Testing and Evaluation, Volume 8, ASM International,519-529, (2000)
  23. G. Subhash and G. Ravichandran, "Split Hopkinson Pressure Bar Testing of Ceramics," ASM Handbook, Mechanical Testing and Evaluation, Volume 8, ASM International, 497- 504, (2000)
  24. A. Chandra, K. Wang, Y.Y. Huang and G. Subhash, M.H. Miller,and W. Qu "Role of Unloading in Machining of Brittle Materials" ASME Journal of Manufacturing Science and Engineering, Vol. 122, 452-462 (2000).
  25. J.M. Staehler, B.J. Pletka, W.W. Predebon,and G. Subhash, “Micromechanisms of Deformation in High Purity Hot-Pressed Alumina” Material Science and Engineering A291, 37-45 (2000).
  26. 25. B.J. Koeppel and G. Subhash, “Characteristics of Residual Plastic Zone Under Static and Dynamic Indentations” Wear 224, 56-67 (1999).
  27. B. J. Koeppel and G. Subhash, “Influence of Cold Rolling and Strain Rate on Plastic Response of Powder Metallurgy and Chemical Vapor Deposition Rhenium,” Metallurgical and Materials Transactions A Vol. 30 [10], 2641-2648 (1999)
  28. G. Subhash, B.J. Koeppel, and A. Chandra, "Dynamic Indentation Hardness and Rate Sensitivity in Metals," ASME Journal of Engineering Materials and Technology,121, 257-263 (July, 1999)
  29. R. J. Anton, I. Miskioglu and G. Subhash, "Determination of Residual Stress Fields Beneath a Vickers Indentation" Experimental Mechanics 39 (3), 228-231 (Sept 1999).
  30. Y.J. Lee, G. Subhash and G. Ravichandran, "Constitutive Modeling of Textured Body Centered Cubic (BCC) Polycrsytal," International Journal of Plasticity 15, 625-645 (1999).
  31. G. Subhash, S. M. Beesley, R.K. Govila and W. Rafeneillo, “Fatigue Crack Propagation in Aluminum Nitride Ceramics Under Cyclic Compression,” Journal of Materials Science Vol. 34, 4645-4652 (1999)
  32. S.H. Yoo, T.S. Sudarshan, K. Sethuram, G. Subhash and R.J. Dowding, "Consolidation and High Strain rate Mechanical Behavior of Nanocrystalline Tantalum Powder" Nanostrctured Materials Vol. 12, 23-28 (1999).
  33. Sang H. Yoo, T.S. Sudarshan, K. Sethuram, G. Subhash, R.J.Dowding, "Dynamic Compreesion Behavior of Tungsten Powders Consolidated by Plasma Pressure Compaction", Powder Metallurgy, Vol.42, No.2, 181-182 (1999)
  34. G. Subhash and G. Ravichandran, “'Mechanical Behavior of Hot Pressed Aluminum Nitride Under Uniaxial Compression'' Journal of Materials Science 33 1933-1939 (1998).
  35. J. Lankford, W.W. Predebon, J.M. Staehler, G. Subhash, B.J. Pletka, and C.E. Anderson, “The Role of Plasticity as Limiting Factor in the Compressive Failure of High Strength Ceramics,” Mechanics of Materials 29 205-218 (1998).
  36. G. Subhash, G. Ravichandran and B.J. Pletka, “Plastic Deformation of Hafnium under Uniaxial Compression,” Metallurgical and Materials Transactions A, 28A 1479-1487 (1997).
  37. B.J. Koeppel and G. Subhash, “A Novel Technique to Investigate the Dynamic Indentation Hardness of Materials,” Experimental Techniques, 21 [3] 16-18 (1997).
  38. G. Subhash, “The Constitutive Behavior of h.c.p. Refractory Metals as a Function of Strain Rate Under Uniaxial Compression,” JOM, Vol., 47[5], 55-58, May (1995).
  39. G. Ravichandran and G. Subhash, “A Micromechanical Model for High Strain Rate Behavior of Ceramics,” International Journal of Solids and Structures, 32 [17/18] 2627-2646 (1995).
  40. J.M. Staehler, W.W. Predebon, B.J. Pletka, and G. Subhash, “Strain Rate Dependence of Compressive Strength and Plasticity in High Purity Alumina,” JOM, 60-63, May (1995).
  41. G. Ravichandran and G. Subhash, “Critical Appraisal of Limiting Strain Rates for Compression Testing of Ceramics in a Split Hopkinson Pressure Bar,” Journal of the American Ceramic Society 77 [1] 263-267 (1994).
  42. W. Chen, G. Subhash and G. Ravichandran, “Evaluation of Ceramic Specimen Geometries Used in Split Hopkinson Pressure Bar,” Dymat, 1 [3], 191-210 (1994).
  43. G. Subhash, Y. J. Lee and G. Ravichandran, “Plastic Deformation of CVD Textured Tungsten: I, Constitutive Response and Modeling,” Acta Metallurgica et Materialia 42 [1] 319- 330 (1994).
  44. G. Subhash, Y. J. Lee and G. Ravichandran, “Plastic Deformation of CVD Textured Tungsten: II, Characterization,” Acta Metallurgica et Materialia 42 [1] 331-340 (1994).
  45. M.A. Meyers, G. Subhash, B.K. Kad and L. Prasad, “Evolution of Microstructures and Shear-Band Formation in -h.c.p. Titanium,” Mechanics of Materials, 17 175-193 (1994).
  46. G. Subhash and S. Nemat-Nasser, “Dynamic Stress-Induced Transformation and Texture Formation in Uniaxial Compression of Zirconia Ceramics,” Journal of the American Ceramic Society 76 [1] 153-65 (1993).
  47. G. Subhash and S. Nemat-Nasser, “Uniaxial Stress Behavior of Y-TZP,” Journal of Material Science 25 5949-5952 (1993).
  48. G. Subhash and S. Nemat-Nasser, M. M. Mehrabadi and H. M. Shodja, “Experimental Investigation of Fabric-Stress Relations in Granular Materials,” Mechanics of Materials, 11 [2] 87-106 (1991).

Conference Proceedings

  1. G. Subhash, Hongwen Zhang and Hao Li, “Mechanical behavior of Hf/Zr bulk metallic glasses using Nano Indentation” Proceedings of the International Conference on Mecchanical Behavior of Materials (ICM-9), Geneva, Switzerland, May 25-29, 2003.
  2. G. Subhash, J.E. Loukus and S.M. Pandit, “Characterization of ductile to broittle transition using Single-Grit Scratching” Paper # 206, Proceedings of the 2002 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, June 10-12, 2002, Milwaukee, WI.
  3. G. Subhash and R. Bandyo, “ Wear Characterization of Structural Ceramics using Single- Grit Scratching” to appear in the Proceedings of the 27th American Ceramic Society Conference, Cocoa Beach, Fl Jan 25-30, (2002)
  4. W. Zhang, J. E. Loukus, G. Subhash, A. Chandra, “Investigation of Material Removal Mechanisms during High Speed Single-Grit Scratching of Brittle Materials” Proceedings of NSF Grantees Conference, Orlando, Fl, January 7-10, (2001)-available on CD
  5. S. Prasoody, S.A. Majlessi, G. Subhash, J. Pilling, M. Ahmetoglu, T. Welo, “Process Control for Tube Hydoforming of Aluminum Extrusions” to appear in the Proc. of An International Conference in Tube Hydroforming 2000 Technology, Organized and Sponsored by ERC/NSM, SME Troy, MI June 13-14, 2000.
  6. Chandra, A., Fu, G., Guha, S. and Subhash, G., 2000, A Plasticity Based Model of Material Removal During Chemical Mechanical Polishing, Proc. 2000 CMP-MIC Conference, Santa Clara, pp. 239-242.
  7. G. Subhash, J.E. Loukus, W. Zhang and A. Chandra, “Experimental and Numerical Modeling of Material Removal During High Speed Grinding process” Proc. SEM IX International Congress on Experimental Mechanics, June 5-8, Orlando, Florida, pp. 127-130 (2000).
  8. G. Subhash and W. Zhang, “Indentation Fracture Mechanisms in Brittle Material” Proc. SEM IX International Congress on Experimental mechanics, June 5-8, Orlando, Florida, pp. 842-845 (2000)
  9. 1. S.J. Vitton and G. Subhash, Dynamic and Static Strength of Aggregates: An Estimate of Rate Sensitivity of Geologic Materials, Proceedings, Institute of Lake Superior Geology, 45th Annual Meeting, Marquette, MI, v. 45, part 1, pp 54-56, (1999).
  10. J.E. Loukus, G. Subhash and A. Chandra, “Some bservations on High Speed Single Grit Scraching of Ceramics” Proceedings of NSF Grantees conference, Vancouver, CA Jan 04- 06, 2000.
  11. R. J. Anton, I. Miskioglu and G. Subhash, "Determination of Residual Stress Fields Beneath a Vickers Indentation Using Photoelasticity" in Proc. SEM Annual Conference on Theoretical, Experimental and Computational Maechanics, June 7-9, 1999, Cincinnati, OH, pp 660-662.
  12. B.J. Koeppel and G. Subhash "Dynamic Indentation Hardness of Metals" Proceedings of the IUTAM Symposium on Micro- and Macrostrctural Aspects of Thermoplasticity, ed. by O.T. Bruhns and E. Stein, Solid Mechanics and its Applications, Kluwer Academic Publishers, Vol. 62, 447-456 (1999).
  13. A. Chandra, K. Wang, Y. Huang, and G. Subhash, "Role of Unloading in Machining of Brittle Materials, Manufacturing Science and Engineering-1997, ASME, MED vol. 6-2, NY, pp. 83-90, 1997.
  14. G. Subhash, B.J. Koeppel, A. Chandra, and Y. Huang, "Dynamic Indentation Hardness of Metals and its Implications to High Speed Machining," Manufacturing Science and Engineering-1997, ASME, MED vol. 6-2, NY, pp. 69-74, 1997.
  15. G. Subhash, B.J. Koeppel, R.J. Anton, Y. Huang, Y. and A. Chandra, "High Strain Rate Normal Indentations of Ceramics: Implications for Material Removal Mechanisms," Composites and Functionally Graded Materials, ASME-MD Vol. 80, NY, pp. 417-424, 1997.
  16. B.J. Koeppel and G. Subhash "Dynamic Indentation Hardness of Metals" Proceedings of the International Union of Theoretical and Applied Mechanics (IUTAM), Bochum, Germany, Aug 25-29, 1997.
  17. S.H. Yoo, M.S. Krupa, T.S. Sudarshan, R. Dowding and G. Subhash, "Dynamic Compression Properties of Pure Tungsten Consolidated by Plasma Activated Sintering," Proceedings of the Fourth International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp.xxx-xxx, (1997).
  18. B.J. Pletka, S.B. Blystone, G. Subhash and R.J. Dowding, "Structure Properties of Mechanical Alloyed W-Hf-Ti Alloys," Proceedings of the Third International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp. xx-xx, (1997).
  19. B.J. Koeppel and G. Subhash, "Dynamic Indentation Hardness and Machinability" 214-215 (1997) Abstract proceedings of the SEM Spring Conference on Experimental Mechanics, Bellevue, WA June 2-4, (1997).
    G. Subhash and B.J. Koeppel,     “Influence of Cold Rolling on Plastic Response of PM and CVD Rhenium,” International Symposium on Rhenium and Rhenium Alloys, Orlando, Florida, Feb 9-13, (1997), ed. Boris D. Briskin, pp. 321-326.
  20. 20. G. Subhash and B.J. Koeppel, “Influence of Cold Rolling on Plastic Response of PM and CVD Rhenium,” International Symposium on Rhenium and Rhenium Alloys, Orlando, Florida, Feb 9-13, (1997), ed. Boris D. Briskin, pp. 321-326.
  21. B. J. Koeppel and G. Subhash, “Microstructural Dependance of Plastic Response in CVD and PM Rhenium” Proceedings of The 32nd SES Annual Meeting, New Orleans, LA, Oct 30-Nov 2, pp. 587-588, (1995).
  22. B.J. Pletka, G. Subhash, D. Edelman and R.J. Dowding, “Processing-Structure Relationship in Open die Hot Forged W-Hf-Ti,” Proceedings of the Third International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp. 201-208, (1995).
  23. B. Koeppel and G. Subhash, “Plastic Response and Deformation Microstructures in Rhenium” Micromechanical Modeling and Damage Chracterization of Advanced materials, ed: S.A. Meguid, ASME-AMD-Vol.199, pp. 93-100, ASME, New York, NY (1995)
  24. G. Subhash, R.J. Dowding, D. Edelman and D. Kapoor, “High Strain Rate Behavior of W- Hf and W-HfC Composites,” Proceedings of the 2nd International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp.213-218, (1994).
  25. D. Edelman, B.J. Pletka, and G. Subhash, “Development of W-Hf-Ti Composites by Liquid Phase Sintering,” Proceedings of the 2nd International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp.227-234, (1994).
  26. G. Subhash, B.J. Pletka, and G. Ravichandran, “Constitutive Response and Characterization of Deformation Modes in Hafnium,” Proceedings of the 2nd International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp.597-604, (1994).
  27. B. Koeppel and G. Subhash, “Constitutive Response and Characterization of Deformation Modes in Rhenium,” Proceedings of the 2nd International Conference on Tungsten and Refractory Metals, edited by A. Bose and R.J. Dowding, Metal Powder Industries Federation, Princeton, NJ, pp.673-680, (1994).
  28. G. Subhash and G. Ravichandran, “High Strain Rate Behavior and Localization in Hafnium,” Experimental Techniques in the Dynamics of Deformable Solids, edited by K. T. Ramesh, AMD-Vol. 152, pp. 79-84, ASME, New York, NY (1993).
  29. G. Subhash and G. Ravichandran, “High Strain Rate Behavior and Localization in Hafnium,” Proceedings of 13th Army Symposium on Solid Mechanics, eds. S.C. Chou, F.D. Bartlett Jr., T.W. Wright and K. Iyer, pp. 621-631, (1993).
  30. G. Subhash and S. Nemat-Nasser, “Microcrack Induced Damage in Zirconia Ceramics Under Uniaxial Compression: Experiments and Modeling,” Advances in Local Fracture/ Damage Models for the Analysis of Engineering Problems, AMD-Vol. 137, Proceedings of ASME Summer Mechanics and Materials Conference, Tempe, Arizona, April 28-May 1, 1992, eds., J. H. Giovanola and A. J. Rosakis, 93-107 (1992).
  31. M.M. Mehrabadi, S. Nemat-Nasser, H.M. Shodja and G. Subhash, “Some Basic Theoretical and Experimental Results on Micromechanics of Granular Flow,” Micromechanics of Granular Materials, Proceeding of the US/Japan Seminar on Micromechanics of Granular Materials, Sendai-Zao, Japan, edited by M. Satake and J.T. Jenkins, 253-262, Oct 26-30, (1987).
  32. G. Subhash, S. Rahamatulla and S.V. Rao, “Transient Thermal Behavior of Steam Chest During Turbine Startups,” Proceedings of Fifth International Conference, Montreal, Canada, , June 29-July 3, 1987, Numerical Methods in Thermal Problems, eds., R. W. Lewis, K. Morgan and W. G. Habashi, Pineridge Press, Swansea, U.K., pp. 1868-1876 (1987).
  33. G. L. Narasaiah, G. Subhash and N.V.L.S. Sarma, “A 3-D Mesh Generator for FEM Analysis of Complex Structures,” Proceeding of All India Seminar on Computers for 1990s for India, Trichirapalli, India, D3.01-D3.14, Aug 22-23, (1986).

Other Articles
“ Biographical sketch” of Prof. Sia Nemat-Nasser, Mechanics of Materials 35 (2003) 185-186.