| Full Name: **Prof. Ayatollahi, Majid Reza** Position: **Professor** Phone: **98-21-77 240 201** Fax: **98-21-7724 0488** Email: **m.ayat AT iust.ac.ir**
Address: **Iran University of Science & Technology, Tehran, IRAN** |
**University Degrees**
**Current Research** - Investigating the effects of geometry and constraint in fracture mechanics
- Rock Fracture Mechanics
- Experimental determination of crack parameters using Photoelasticity
- Mixed mode brittle fracture in cracked and notched components
**Experiences** **Reviewer for International Journals:** Engineering Fracture Mechanics, Intl. Journal of Fracture, Intl. Journal of Solids and Structures, Intl. Journal of Pressure Vessels and Piping, Intl. Journal of Rock Mechanics and Minining Science, Materials and Design , Structural Engineering and Mechanics, Fatigue and Fracture of Engineering Materials and Structures, Meccanica, Computational Materials Science, ASME-Journal of Applied Mechanics, ASCE-Journal of Engineering Mechanics. **Reviewer for National Journals:** Iranian Journal of Science and Technology, ISME Journal, IUST International Journal of Engineering Science, Modarres Journal, Amirkabir Journal, Mechanical and Aerospace Journal of Engineering, JAST, Ferdowsi University, Esteghlal Journal. **Vice Chair in Research Affairs** (2000- 2008), Department of Mechanical Engineering, IUST. **Member of University research council** (2000-2008), Iran University of Science and Technology. **Member of committee for promotion assessment** (2004-present), Department of Mechanical Engineering, IUST. **Head of the Solid Mechanics educational group** (2008-present), Department of Mechanical Engineering, IUST. **Director of Fatigue and Fracture Research Laboratory** (2001-present), Department of Mechanical Engineering, IUST. **Director of the B.Sc. projects office** (1989-1993), Department of Mechanical Engineering, IUST. **Professo**r Since May 2007, Department of Mechanical Engineering, IUST. **Associate professor** 2003-2007, Department of Mechanical Engineering, IUST. **Assistant professor** 1999-2003, Department of Mechanical Engineering, IUST.
**Fields of Interest** - Fracture Mechanics.
- Computational Solid Mechanics.
- Experimental Solid Mechanics.
**Funded Research Projects** - “Failure analysis of turbine shaft in a gas power plant”, Sponsored by Iran Power Plant Repairs Co, 2004-2005.
- “Damage tolerance analysis of a buried water pipeline” Sponsored by Tarvand Tadbir Co, 2003-2004. (In collaboration with Dr. N.M. Nouri)
- “Crack tip parameters in mode I loading”, Sponsored by the Grant Department, Research Office, Iran University of Science and Technology, 2001-2003.
- “Development of a strategic plan for the Structural Integrity Research Center”, Sponsored by the Grant Department, Research Office, Iran University of Science and Technology, 2001-2003.
- “Mixed mode fracture in brittle materials”, Sponsored by the Grant Department, Research Office, Iran University of Science and Technology, 2000-2002.
- “ Brittle fracture in cracked components subjected to shear loading”, Sponsored by the British Energy, UK, Feb. 1998- Jan. 1999.
- “Effects of crack tip constraint in tension-shear loading”, Sponsored by the British Energy, UK, Feb. 1995- Jan. 1998.
**Graduate Theses Supervised** **PHD students** - Zakeri, M., “Photoelastic analysis of cracks under mode I, mode II and mixed mode loading” (PhD), 2008.
- Aliha, M.R.M., “Mixed mode fracture in rock materials” (PhD), 2009.
- Torabi, A.R. "Brittle fracture in U and V-notched components" (PhD), 2009.
- Shadlou, S. (PhD student), Expected year of graduation 2011.
- Akbardoost, J. (PhD student), Expected year of graduation 2012.
- Pirmohammad S. (PhD student), Expected year of graduation 2012.
- Chamani H.R. (PhD student), Expected year of graduation 2013.
** ***MSc Students *(not updated)
**Supervised 39 MSc theses 2000-2009.**
- Shakeri, A. “Brittle fracture in mixed mode II/III”, (MSc), 2006.
- Mostafavi, M. “Effects of loading mode on warm pre-stressed cracks”, (MSc), 2006.
- Hashemi, R. “Fracture analysis of an angled crack reinforced by composite patching”, (MSc), 2005.
- Bagherifard, S. “Analysis of brittle fracture in a ceramic test specimen”, (MSc), 2005.
- Ashtari, R, “A statistical modeling for brittle fracture in marble samples,” (MSc), 2005.
- Hasani, M, “Prediction of fracture trajectory in mode II crack specimens,”(MSc), 2005.
- Rokhi, H, “Free vibration of beams containing double edge cracks,”(MSc), 2005.
- Raghebi, M, “Finite element analysis of curved Timoshenko beam using mode acceleration method,”(MSc),2004.
- Aliha, M.R.M., “Theoretical and experimental investigation of brittle fracture in the cracked semi-circular bend specimen,”(MSc), 2004.
- Nikoobin, A, “Effect of lateral load on crack tip stresses using photoelasticity”(MSc), 2004.
- Khojeh, A, “Vibration analysis of a plate with special crack elements,”(MSc),2004.
- Alinia, A, “The effects of warm pre-stressing on brittle fracture in mode I loading,”(MSc), 2004.
- Shokrani, A, “Crack tip parameters in an edge crack specimen under asymmetric four-point bending,”(MSc), 2003.
- Nasr Esfahani, M, “Extraction of fracture curves using strain energy density criteria,”(MSc), 2003.
- Asadkarami, A, “Evaluation of fracture in mode II punch-type specimens,”(MSc), 2002
- Ardestani, S, “Mechanical and thermal shocks in multilayer circular plates”(MSc), 2002.
- Safari, G.H., “Evaluation crack tip stresses using photoelasticity method,”(MSc), 2002.
- Zanbilbaf, A, “Crack growth path in pure shear loading”,(MSc), 2002.
- Abbasi, H, “Prediction of fracture initiation in angled cracked specimen”,(MSc), 2001.
**Publications - Journal Papers** - 73. Ayatollahi, M.R., Aliha, M.R.M. (2010) "Fracture analysis of some ceramics under mixed mode loading", Journal of American Ceramics Society, In Press.
- 72. Ayatollahi, M.R., Aliha, M.R.M. (2010) "On the use of Anti-symmetric Four-Point bend specimen for mode II fracture experiments" Fatigue and Fracture of Engineering Materials and Structures, In Press.
- 71. Ayatollahi, M.R., Sedighiani, K. (2010) “Crack Tip Plastic Zone under Mode I, Mode II and Mixed Mode (I+II) Conditions” Structural Engineering and Mechanics, In Press.
- 70. Ayatollahi, M.R, Torabi, A.R. (2010) “ Investigation of mixed mode brittle fracture in rounded-tip V-notched components ” Engineering Fracture Mechanics, In Press.
- 69. Ayatollahi, M.R, Nejati, M. (2010) “Experimental evaluation of stress field around the sharp notches using photoelasticity” Materials and Design, In Press.
- 68. Ayatollahi, M.R. , Torabi, A.R., Azizi, P. (2010) “Experimental and Theoretical Assessment of Brittle Fracture in Engineering Components Containing a Sharp V-Notch” , Experimental Mechanics, In Press
- 67. Ayatollahi, M.R, Nejati, M. (2010) “An overdeterministic method for calculation of coefficients of crack tip asymptotic field from finite element analysis”, Fatigue and Fracture of Engineering Materials and Structures, In Press.
- 66. Ayatollahi, M.R., Dehghany, M.(2010) “On T-stresses near V-notches” International Journal of Fracture, Vol. 165, No 1, PP. 121-126
- 65. Saghafi, H. Ayatollahi, M.R., Sistaninia, M. (2010) “ A modified MTS criterion (MMTS) for mixed-mode fracture toughness assessment of brittle materials” Materials Science and Engineering: A, Vol. 527, No. 21-22, PP. 5624-5630
- 64. Aliha, M.R.M., Ayatollahi, M.R., Smith, D.J., Pavier, M.J. (2010) "Geometry and size effects on fracture trajectory in a limestone rock under mixed mode loading"Engineering Fracture Mechanics, Vol. 77, No 11, PP. 2200-2212
- 63. Ayatollahi, M.R, Torabi, A.R. (2010) "Tensile fracture in notched polycrystalline graphite specimens" Carbon, Vol. 48, No 8, PP. 2255-2265
- 62. Ayatollahi M.R., Khoramishad, H., (2010) "Stress intensity factors for a semi-elliptical internal crack embedded in a buried pipe" International Journal of Pressure Vessels and Piping" Vol. 87, No. 4, PP. 165-169.
- 61. Zakeri, M., Ayatollahi M.R., Guagliano, M. (2010) " A Photoelastic study of T-stress in centrally cracked Brazilian disc specimen under mode II loading" Strain, Article in Press, doi: 10.1111/j.1475-1305.2009.00680.x
- 60. Ayatollahi, M.R., Hashemi, R., Rokhi, H. (2010) "New formulation for vibration analysis of Timoshenko beam with double-sided cracks" Structural Engineering and Mechanics, Vol. 34, No 4, PP. 475-490.
- 59. Ayatollahi M.R., Torabi A.R. (2010) "Determination of mode II fracture toughness for U-shaped notches using Brazilian disc specimen" International Journal of Solids and Structures, Vol. 47, PP. 454-465.
- 58. Aliha, M.R.M., Ayatollahi, M.R. (2010) "Geometry effects on fracture behaviour of polymethyl methacrylate" Materials Science and Engineering-A, Vol. 527, PP. 526-530.
- 57. Ayatollahi M.R., Torabi A.R. (2010) "Brittle fracture in rounded-tip V-shaped notches" Materials and Design, Vol. 31, PP. 60-67
- 56. Khoramishad, H., Ayatollahi, M.R. (2009) "Finite element analysis of a semi-elliptical external crack in a buried pipe" Transactions of the Canadian Society for Mechanical Engineering, Vol. 33, PP. 399-409.
- 55. Aliha, M.R.M., Ayatollahi, M.R., Kharazi, B. (2009) "Mode II brittle fracture assessment using ASFPB specimen" International Journal of Fracture, Vol. 159, PP. 241-246.
- 54. Aliha, M.R.M., Ayatollahi, M.R. (2009) “Brittle Fracture Evaluation of a Fine Grain Cement Mortar in combined tensile-shear deformation” Fatigue and Fracture of Engineering Materials and Structures, Vol. 32, PP. 987-994.
- 53. Ayatollahi M.R., Torabi A.R. (2009) "A criterion for brittle fracture in U-notched components under mixed mode loading" Engineering Fracture Mechanics, Vol. 76, PP. 1883-1896.
- 52. Ayatollahi M.R., Torabi A.R. (2009) Investigation of Fracture in V-notched Brittle Polymers under Pure Shear Loading, Iranian Journal of Polymer Science and Technology, Vol. 22, PP. 63-73.
- 51. Ayatollahi, M.R. and Bagherifard S., (2009) "Numerical analysis of an improved DCDC specimen for investigating mixed mode fracture in ceramic materials", Computational Materials Science, Vol. 46, PP. 180-185.
- 50. Ayatollahi, M.R., Aliha, M.R.M., (2009) “Analysis of a new specimen for mixed mode fracture tests on brittle materials” Engineering Fracture Mechanics, Vol. 76, PP. 1563-1573.
- 49. Ayatollahi, M.R. and Arian Nik, M. (2009) “Edge distance effects on residual stress distribution around a cold expanded hole in Al 2024 alloy” Computational Materials Science, Vol. 45, PP. 1134-1141.
- 48. Ayatollahi, M.R., Aliha, M.R.M.(2009) "Mixed-Mode Fracture in Soda-Lime glass Analyzed by Using the Generalized MTS Criterion" International Journal of Solids and Structures, Vol. 46, PP. 311-321.
- 47. Ayatollahi, M.R. and Mousavi, M.M.S. (2008) "Confining pressure effects on mode I and mode II stress intensity factors of cracked rocks" Iranian Journal of Mining Engineering, Vol. 3, No 5, PP. 21-32.
- 46. Aliha, M.R.M., Ayatollahi, M.R, Pakzad, R. (2008) "Brittle fracture analysis using a ring shape specimen containing two angled cracks" International Journal of Fracture, Vol. 153 (1), PP. 63-68.
- 45. Aliha, M.R.M., Ayatollahi, M.R, Mousavi, M.M.S. (2008) "Confining pressure effects on stress intensity factors: A 3D finite element analysis" Revue Synthese, Vol. 19, PP. 33-39.
- 44. Ayatollahi, M.R. and Aliha, M.R.M. (2008) "On the use of Brazilian disc specimen for calculating mixed mode I-II fracture toughness of rock materials", Engineering Fracture Mechanics, Vol. 75, PP. 4631-4641.
- 43. Ayatollahi, M.R. and Aliha, M.R.M. (2008) "Mixed mode fracture analysis of polycrystalline graphite - A modified MTS criterion", Carbon, Vol. 46(10), PP. 1302-1308.
- 42. Aliha, M.R.M. and Ayatollahi M.R. (2008) " On mixed mode I/II crack growth in dental resin materials" Scripta Materialia, Vol. 59, PP. 258-261.
- 41. Ayatollahi, M.R. and Bagherifard, S. (2008) "Brittle fracture analysis of the offset-crack DCDC specimen" Structural Engineering and Mechanics, Vol. 29, No. 3, PP. 301-310.
- 40. Aliha, M.R.M. and Ayatollahi M.R. (2008) " Fracture toughness evaluation for brittle polymers under combined tensile-shear loads" Iranian Journal of Polymer Science and Technology, Vol. 21, No 2, PP. 107-117.
- 39. Ayatollahi, M.R., Rokhi , H. and Hashemi, R. (2008) "Free vibration of beam with double-sided edge cracks" International Journal of Science and Technology (Amirkabir), Vol. 18, PP. 51-48.
- 38. Ayatollahi M.R. and Aliha M.R.M. and Rahmanian S. (2007) "Finite element analysis of an improved center crack specimen", Key Engineering Materials, Vol. 347, PP. 441-446.
- 37. Khojeh, A., Ayatollahi, M.R. and Ahmadian H. (2007) "Vibrational analysis of cracked beams using a special crack element" IUST International Journal of Engineering Science, Vol.18, No 1, PP. 11-18. (in Persian)
- 36. Guagliano M., Ayatollahi M.R., Zakeri M. and Colombo C. (2007) "Experimental investigation of T-stress effects on photoelastic fringes in Brazilian disk under mode II conditions" Key Engineering Materials, Vol 348, PP. 969-972.
- 35. Zakeri, M., Ayatollahi, M.R. and Nikoobin, A. (2007) “Photoelastic Study of a Center-Cracked Plate - The Lateral Load Effects”, Computational Materials Science, Accepted for publication.
- 34. Ayatollahi, M.R., and Zakeri, M. (2007) "T-Stress Effects on Isochromatic Fringe Patterns in Mode II", International Journal of Fracture, Vol.143, PP. 189-194.
- 33. Ayatollahi, M.R., and Aliha, M.R.M. (2007) “Fracture toughness study for a brittle rock subjected to mixed mode I/II loading”, International Journal of Rock Mechanics and Mining Science, Volume 44, No 4, PP. 617-624.
- 32. Ayatollahi M.R. and Hashemi, R. (2007) "Mixed mode fracture in an inclined center crack repaired by composite patching, Composite Structures, Vol. 81, PP. 264-273.
- 31. Ayatollahi M.R. and Hashemi R. (2007) “Computation of stress intensity factors (KI, KII) and T-stress for cracks reinforced by composite patching” Composite Structures, Vol. 78, PP. 602-609.
- 30. Ayatollahi M.R. and Mostafavi M. (2007) “Finite element analysis of a center crack specimen warm pre-stressed under different modes of loading” Computational Materials Science, Vol. 38, No. 4, PP. 847-856.
- 29. Ayatollahi M.R. and Aliha M.R.M. (2007) “Wide Range Data for Crack Tip Parameters in Two Disc-Type Specimens under Mixed Mode Loading” Computational Materials Science, Vol. 38, No. 4, PP. 660-670.
- 28. Hashemi, R. and Ayatollahi M.R. (2006) “The effect of hygrothermal composite patch on fracture strength of a reinforced crack” Applied Mechanics and Materials, Vol. 5-6, PP. 189-196.
- 27. Aliha M.R.M. , Ashtari, R. and Ayatollahi M.R. (2006) “Mode I and Mode II fracture toughness testing for a coarse grain marble” Applied Mechanics and Materials, Vol. 5-6, PP. 181-188.
- 26. Smith, D.J., Ayatollahi, M. R. and Pavier, M.J. (2006) “On the Consequences of T-stress in Elastic Brittle Fracture”, Proceedings of the Royal Society A, Vol. 462, PP. 2415-2437.
- 25. Ayatollahi M.R. and Mostafavi M. (2006) “Effects of Crack Tip Blunting and Residual Stress on a Warm Pre-Stressed Crack Specimen” Computational Materials Science, Vol. 37, PP. 393-400.
- 24. Ayatollahi, M.R. and Aliniaziazi, A. (2006) "Effects of lateral load on warm prestressing in a center crack plate, Materials Science and Engineering – A, Vol. 441, PP. 170-175.
- 23. Ayatollahi M.R., Aliha M.R.M. and Hassani M.M. (2006) “Mixed mode brittle fracture in PMMA - An experimental study using SCB specimen” Materials Science and Engineering – A, Vol. 417, PP. 348-356.
- 22. Ayatollahi, M.R., and Aliha, M.R.M. (2006) “On Determination of Mode II Fracture Toughness using Semi-circular Bend Specimen”, International Journal of Solids and Structures, Vol. 43, PP. 5217-5227.
- 21. Ayatollahi, M.R., Asadkarami, A. and Zakeri, M. (2005) “Finite element evaluation of punch-type crack specimens” International Journal of Pressure Vessels and Piping, Vol. 82, PP. 722-728
- 20. Ayatollahi, M.R., and Aliha, M.R.M. (2005) “Cracked Brazilian disc specimen subjected to mode II deformation” Engineering Fracture Mechanics, Vol. 72, PP. 493-503.
- 19. Asadkarami, A. and Ayatollahi, M.R. (2005) “E-shape specimen for determining fracture toughness in shear loading” IUST International Journal of Engineering Science, Vol. 16, No 4, PP. 11-20.
- 18. Ayatollahi, M.R. and Zanbilbaf, A. (2005) “Path of crack growth under pure shear”, IUST International Journal of Engineering Science, Vol. 16, No 2, 75-83.
- 17. Ayatollahi, M.R., Faritus, M.R. and Asadkarami, A. (2004) “Three-dimensional stress analysis of two standard crack specimens” IUST International Journal of Engineering Science, Vol. 15, No. 4, PP. 97-102.
- 16. Ayatollahi, M.R., Smith, D.J. and Pavier, M.J. (2004) “Effect of constraint on the initiation of ductile fracture in shear loading” Key Engineering Materials, Vol. 261, PP. 183-188.
- 15. Ayatollahi, M.R., and Aliha, M.R.M. (2004) “Fracture Parameters for Cracked Semi-circular Specimen”, International Journal of Rock Mechanics and Mining Science, Vol. 41, Supplement 1, PP. 20-25.
- 14. Ayatollahi, M.R., Abbasi, H. (2003) “Crack growth prediction based on the maximum hoop strain criterion- Plane stress”, IUST International Journal of Engineering Science, Vol. 14, No. 4, PP. 123-13
- 13. Ayatollahi, M.R. and Safari, G.H. (2003) “Evaluation of crack tip constraint using photoelasticity”, International Journal of Pressure Vessels and Piping, Vol. 80, No. 9, PP. 665-670.
- 12. Ayatollahi, M.R., Pavier, M.J. and Smith, D.J. (2002) "Mode I cracks subjected to large T-stresses", International Journal of Fracture, Vol. 117, No 2, PP. 159-174.
- 11. Ayatollahi, M.R., Mohammad-Aliha, M.R., Aliniaziazi, A. (2002) “Variation of nonsingular stress parameter in terms of crack length”, IUST International Journal of Engineering Science, Vol 13, No 3, PP 173-186.
- 10. Ayatollahi, M.R., Smith, D.J. and Pavier, M.J. (2002) “Crack tip constraint in mode II deformation” International Journal of Fracture, Vol. 113, No 2, PP 153-173.
- 9. Ayatollahi, M.R. and Abbasi, H. (2001) “Prediction of fracture using a strain based mechanism of crack growth” Building Research Journal, Vol. 49, No 3, PP 167-180.
- 8. Ayatollahi, M.R., Smith, D.J. and Pavier M.J. (2001) “Effect of higher order stresses in an internal crack problem” IUST International Journal of Engineering Science, Vol. 12, No 2, PP 53-66.
- 7. Ayatollahi, M.R. (2001) “On biaxially loaded internal cracks” International Journal of Fracture, Vol. 109, PP. L9-L14.
- 6. Smith, D.J., Ayatollahi, M. R. and Pavier, M.J.(2001) “The role of T-stress in brittle fracture for linear elastic materials under mixed mode loading”, Fatigue and Fracture of Engineering Materials and Structures, Vol. 24, No 2, PP 137-150.
- 5. Ayatollahi, M.R., Pavier, M.J. and Smith, D.J. (1998) "Determination of T-stress from finite element analysis for mode I and mixed mode I/II loading", International Journal of Fracture, Vol. 91, PP 283-298.
- 4. Smith D.J., Ayatollahi, M.R., Davenport, J.C.W. and Swankie, T.D. (1998) "Mixed mode brittle and ductile fracture of a high strength rotor steel at room temperature", International Journal of Fracture, Vol. 94, PP 235-250.
- 3. Ayatollahi, M.R., Smith D.J. and Pavier, M.J. (1998) "A method for calculating T-stress for mixed mode problems", International Journal of Key Engineering Materials, Vol. 145, PP 83-88.
- 2. Ayatollahi, M.R., Pavier, M.J. and Smith, D.J. (1996) "On mixed mode loading of a single edge notched specimen", International Journal of Fracture, Vol. 82, PP R61-R66.
- 1. Eslami, M.R. and Ayatollahi, M.R., (1993) "Modal Analysis of Shell of Revolution on Elastic Foundation ", International Journal of Pressure Vessels and Piping, Vol. 56, PP 351-368.
**Publications - Conference Proceedings**** (not updated)**
- 64. Aliha M.R.M. and Ayatollahi M.R. (2007) "Combined mode fracture toughness assessment for a high strength cement mortar" Proceedings of DAMAS conference, Turin, Italy.
- 63. Ayatollahi M.R., Azad H. and Hashemi R. (2007) "Analysis of cracked pipes reinforced by composite patching" First Iranian Pipe and Pipeline Conference, Tehran, Iran.
- 62. Akbardoost J., Ayatollahi M.R. and Aliha M.R.M. (2007) "Strength evaluation of oil and gas pipes under external explosive loading" First Iranian Pipe and Pipeline Conference, Tehran, Iran.
- 61. Aliha M.R.M. and Ayatollahi M.R. (2007) "A fracture mechanics approach for analyzing spiral weld pipes containing crack" First Iranian Pipe and Pipeline Conference, Tehran, Iran.
- 60. Ayatollahi M.R. and Khorramishad H. (2007) "Stress intensity factors for cracked buried pipes - 3D finite element analysis" Proceedings of 15th Annual International Conference on Mechanical Engineering, Tehran, Iran.
- 59. Ayatollahi M.R. Aliha M.R.M. and Khademi S. (2007) "On determination of tensile strength of rock materials using disk-type specimens" Proceedings of 15th Annual International Conference on Mechanical Engineering, Tehran, Iran.
- 58. Ayatollahi M.R. and Khorramishad H. (2007) "Two-dimensional analysis of cracks in buried oil and gas pipes" Proceedings of Third National Conference on Civil Engineering, Tabriz, Iran.
- 57. Ayatollahi M.R. and Saravani M. (2007) "Finite element analysis of cracks existing in root of a V-notch" Proceedings of Third National Conference on Civil Engineering, Tabriz, Iran.
- 56. Aliha M.R.M., Ayatollahi M.R. and Ashtari R. (2007) "Experimental investigation of brittle fracture in a cracked marble specimen" Proceedings of Third National Conference on Civil Engineering, Tabriz, Iran.
- 55. Ayatollahi M.R. and Tiznobeik H. (2007) "A review of numerical techniques used for photoelastic analysis of cracks", Proceeding of 6th conference of Iranian Aerospace Society, Tehran, Iran.
- 54. Ayatollahi M.R. and Saravani M. (2007) "Experimental determination of stress intensity factors in cracked V-notches using photoelasticity", Proceeding of 6th conference of Iranian Aerospace Society, Tehran, Iran.
- 53. Ayatollahi M.R., Rokhy H. and Hashemi R. (2007) "Free vibration analysis of a cracked Timoshenko beam" Proceeding of 6th conference of Iranian Aerospace Society, Tehran, Iran.
- 52. Ayatollahi M.R. A., Shakeri and M. Zakeri (2006) "A fracture criterion for strength analysis of cracked drills under drilling torsional moments" Proceedings of the First Iranian Petroleum Engineering Congress, Tehran, Iran.
- 51. Ayatollahi M.R., Aliha M.R.M. and Takaffoli, M. (2006) "Application of fracture mechanics for determination of in-situ stresses during hydraulic fracturing process" Proceedings of the First Iranian Petroleum Engineering Congress, Tehran, Iran.
- 50. Aliha M.R.M. and Ayatollahi M.R. (2006) "A theoretical investigation of hydraulic fracturing in horizontal wells using fracture mechanics approach" Proceedings of the First Iranian Petroleum Engineering Congress, Tehran Iran.
- 49. Ayatollahi, M.R. and Mostafavi, M. (2006) “Mode I preloading – mode II fracture in warm prestressing” Proceedings of the 16th European Conference on Fracture- ECF16, Alexandroupolis, Greece.
- 48. Ayatollahi, M.R. and Aliha, M.R.M. (2006) “Predictions of mixed mode fracture toughness for a soft rock” Proceedings of the 16th European Conference on Fracture- ECF16, Alexandroupolis, Greece.
- 47. Ayatollahi, M.R. and Mostafavi, M. (2006) ”Warm pre-stressing effects on mechanism of fracture in a central angled crack specimen” Proceedings of the 10th International ISME Conference, Isfahan, Iran.
- 46. Ayatollahi, M.R., Aliha, M.R.M and Poursaeedi, E (2006) ”Failure evaluation of a fractured turbine shaft in a gas power plant using finite element analysis” Proceedings of the 10th International ISME Conference, Isfahan, Iran.
- 45. Ayatollahi, M.R. and Hashemi, R. (2006) “Mixed mode brittle fracture in cracked components reinforced by composite patching” Proceedings of 7th ICCE International Conference, Tehran, Iran. (In Persian)
- 44. Ayatollahi, M.R. and Hashemi, R. (2006) “Optimized fiber angle for composite reinforcement of a crack on a rivet hole” Proceedings of 7th ICCE International Conference, Tehran, Iran. (In Persian)
- 43. Ayatollahi, M.R. and Takaffoli, M. (2006) “Finite element modeling for hydraulic fracturing in oil and gas wells” Proceedings of 7th ICCE International Conference, Tehran, Iran. (In Persian)
- 42. Ayatollahi, M.R. and Hassani, M.M. (2005) “Fracture initiation angle for a cracked plate under pure shear” Proceedings of 2nd National Conference on Thin-Walled Structures, Kerman, Iran, PP. 301-310. (in Persian)
- 41. Ayatollahi, M.R. and Hashemi, R. “Effects of composite reinforcement on a thin-walled plate containing a central crack” Proceedings of 2nd National Conference on Thin-Walled Structures, Kerman, Iran, PP. 293-300. (in Persian)
- 40. Ayatollahi, M.R. and Aliniaziazi, A. (2005) “Finite element analysis of a warm pre-stressed center crack plate” Proceedings of 2nd National Conference on Civil Engineering, Tehran, Iran. (in Persian)
- 39. Ayatollahi, M.R. and Raghebi, M. (2005) “In-plane vibrations of curved Timoshenko beams using finite element method” Proceedings of 2nd National Conference on Civil Engineering, Tehran, Iran. (in Persian)
- 38. Ayatollahi, M.R. and Hassani, M.M. (2005) “Path of crack growth in a crack specimen subjected to pure mode II” Proceedings of 2nd National Conference on Civil Engineering, Tehran, Iran. (in Persian)
- 37. Ayatollahi, M.R. and Ashtari, R. (2005) ”Statistical analysis of fracture toughness results for two concrete materials using Weibull’s model” Proceedings of the 9th International ISME Conference, Isfahan, Iran. (in Persian)
- 36. Ayatollahi, M.R. Zakeri, M. (2005) ”Evaluation of iso-chromatic fringes around mode II cracks using theory of photoelasticity” Proceedings of the 9th International ISME Conference, Isfahan, Iran. (in Persian)
- 35. Ayatollahi, M.R. Mostafavi, M. (2005) ”Effects of preloading level on a warm pre-stressed crack specimen” Proceedings of the 9th International ISME Conference, Isfahan, Iran
- 34. Ayatollahi, M.R., Aliniaziazi, A. and Mostafavi, M. (2005) “Warm pre-stress effects on cleavage fracture in center crack specimen” Proceedings of the 11th International Conference on Fracture- ICF11, Turin, Italy.
- 33. Ayatollahi, M.R. Zakeri, M. and Hassani, M.M. (2005) “On the presence of t-stress in mode ii crack problems” Proceedings of the 11th International Conference on Fracture- ICF11, Turin, Italy.
- 32. Ayatollahi, M.R., and Aliha, M.R.M. (2005) “Applications of fracture mechanics in rock cutting processes in drilling operation” Iranian Drilling Conference, Arak, Iran. (in Persian)
- 31. Ayatollahi, M.R., Ashtari, R. and Mohammadabadi, M. (2005) “Finite element analysis of CNSR specimen for fracture toughness testing in rock materials” The Iranian Mining Engineering Conference, Tehran, Iran, Vol. 3, PP. 1439-1450. (in Persian)
- 30. Ayatollahi, M.R. and Bagherifard, S. (2005) “A review of mixed mode test specimens for rock and ceramic materials” The Iranian Mining Engineering Conference, Tehran, Iran, Vol. 3, PP. 1451-1464. (in Persian)
- 29. Ayatollahi, M.R., and Aliha, M.R.M. (2004) “Fracture Initiation angle in the centrally cracked circular disk specimen” Proceedings of the 15th European Conference on Fracture- ECF15, Stockholm, Sweden.
- 28. Ayatollahi, M.R. (2004) “J-T Characterization of elastic-plastic stress fields in a mode II crack specimen” Proceedings of the 15th European Conference on Fracture- ECF15, Stockholm, Sweden.
- 27. Ayatollahi, M.R. and Zakeri, M. (2004) “In-plane modes of deformation in crack problems” Proceedings of the 8th International ISME Conference, Tehran, Iran.
- 26. Ayatollahi, M.R. and Khojeh, A. (2004) “Effect of traverse load on fractyure behavior of a cracked specimen” Proceedings of the 8th International ISME Conference, Tehran, Iran.
- 25. Ayatollahi, M. R. and Nikoobin, A. (2004) “An experimental method for determination of T-stress” Proceedings of the 5th Iranian Aerospace Society Conference, PP. 379-386.
- 24. Ayatollahi, M.R. and Shokrani A.R. (2003) “Shear geometry factor for a four-point-bend crack specimen” Proceedings of the 7th International ISME Conference, Mashhad, Iran, Vol. 3, PP 1159-1167.
- 23. Ayatollahi, M.R. and Nasr-Esfahani, M. (2003) “A modification on the minimum distortional strain energy density criterion” Proceedings of the 7th International ISME Conference, Mashhad, Iran, Vol. 3, PP 1122-1128.
- 22. Ayatollahi, M.R., Aliniaziazi, A. and Aliha, M.R.M. (2003) “Stress intensity factors for a weld toe crack in a tubular joint” Proceedings of 6th International Conference on Civil Engineering (ICCE 2003), Isfahan, Iran, Vol. 6, PP 361- 366.
- 21. Ayatollahi, M.R. and Abbasi, H. (2003) “Effects of higher order strains on brittle fracture based on LEFM” Proceedings of the 4th Iranian Aerospace Society Conference, Tehran, Iran, Vol. 1, PP 87-94.
- 20. Ayatollahi, M.R. and Ashtari, R. (2003) “Shear deformation effects in blade vibrations” Proceedings of the 4th Iranian Aerospace Society Conference, Tehran, Iran, Vol. 1, 495-504.
- 19. Ayatollahi, M.R. and Asadkarami, A., (2002) “Finite element study of a double edge crack specimen” Proceedings of 14th European Conference on Fracture, Krakow, Poland, Vol. 1, PP 153-160.
- 18. Ayatollahi, M.R., Pavier, M.J. and Smith, D.J. (2002) “A new specimen for mode II fracture tests” Proceedings of 14th European Conference on Fracture, Krakow, Poland, Vol. 1, PP 161-168.
- 17. Ayatollahi, M.R. (2002) “Evaluation of brittle fracture in spiral weld pipes” Proceedings of International Conference on Helical Seam Submerged-Arc Welded Pipe in Oil and Gas Industry, Tehran, Iran.
- 16. Ayatollahi, M.R. and Zanbilbaf, A. (2002) “Fracture trajectory in shear loading” Proceedings of the 6th International ISME Conference, Tehran, Iran, Vol. 4, PP 2111-2117.
- 15. Ayatollahi, M.R. and Ghandchi-Tehrani, M. (2002) “Dynamic analysis of a straight blade with asymmetrical cross-section” Proceedings of the 6th International ISME Conference, Tehran, Iran, Vol. 5, PP 64-71.
- 14. Ayatollahi, M.R. and Smith D.J. (2001) “Lateral load effects in brittle fracture of internal cracks” Proceedings of the 6th International Conference on Biaxial and Multi-axial Fatigue and Fracture, Lisbon, Vol. 2, PP 983-990.
- 13. Ayatollahi, M.R., Mohammad-Aliha, M.R., Aliniaziazi, A. (2001) “ The near-tip parameters for a few cracked specimens” Proceedings of the 5th International ISME Conference, Rasht, Iran, Vol. 1, PP 441-448.
- 12. Ayatollahi, M.R. and Safari, G.H. (2001) “On the determination of the stress intensity factors using the method of photoelasticity” Proceedings of the 5th International ISME Conference, Rasht, Iran, Vol. 1, PP 239-245.
- 11. Ayatollahi, M.R. and Abbasi, H. (2000) “A modified criterion for mixed mode fracture” Proceedings of the 1st International Aerospace Conference, Tehran, Iran, Vol. 3, PP. 975-983.
- 10. Ayatollahi, M.R. and Abbasi, H. (2000) “Crack growth prediction based on the maximum hoop strain criterion” Proceedings of the 8th International NMCM Conference, Slovakia, paper No 94.
- 9. Ayatollahi, M.R. (2000) “Crack tip parameters for a tension-shear specimen” Proceedings of the 4th International ISME Conference, Tehran, Iran, Vol. 3, PP. 61-66.
- 8. Smith D.J., Swankie, T.D., Ayatollahi, M.R. and Pavier, M.J. (1998) "Brittle and ductile failure under mixed mode loading", Proceedings of 12th European Conference on Fracture (ECF12), Sheffield, UK, Vol. 2, PP 661-666.
- 7. Ayatollahi, M.R., Smith D.J. and Pavier, M.J. (1997) "Displacement based approach to obtain T-stress using finite element analysis", Proceedings of ASME-Pressure Vessel and Piping Conference, Orlando, FL, Vol. 346, PP 149-154.
- 6. Ayatollahi, M.R. and Fuladi, M., (1993) "Nonsymmetrical Vibration of Thin Cylindrical Shells - An Energy Approach", Proceedings of Iranian Society of Mechanical Engineers Annual Conference, Tehran, Iran.
- 5. Ayatollahi, M.R. and Shahani, A.R., (1993) "Thermally Induced Vibrations of Circular Plates", Proceedings of ETCE`93, ASME, Houston, TX, PD-Vol. 52, PP. 45-49.
- 4. Ayatollahi, M.R. and Aghili, J., (1992) " Galerkin Approach in Finite Element Solution of Asymmetrically Loaded Circular Plates ", Proceedings of the Third National Congress on Mechanics, Vol. 2, PP. 699-706, Athens, Greece.
- 3. Ayatollahi, M.R. (1991) " Static, Free and Forced Vibration Analysis of Shell of Revolution on Elastic Foundation ", SMiRT 11 Transaction Vol. J, PP. 165- 70.
- 2. Eslami, M.R. and Ayatollahi, M.R., (1991) " Dynamic Analysis of Shell of Revolution by Modal Analysis", Proceedings of ASME-Pressure Vessel and Piping Conference, 23-27 June, San Diego, CA., Vol. 218, PP. 151-156.
- 1. Eslami, M.R., Ahmadian, H. and Ayatollahi, M.R., (1990) " Static and Dynamic Finite Element Solution of Shell and Plate of Revolution on Elastic Foundation", Proceedings of ASME-Pressure Vessel and Piping Conference , Nashville, TN., Vol. 194, PP. 21-2
**Research Laboratory** **Courses Taught** |