Publications:

GRANTS AND FELLOWSHIPS
1. "Constitutive Modeling and Finite Element Analysis of High Temperature Furnaces"
Principal Investigator: S.F. Duffy
Agency: General Electric   Quartz Product Department
Agency Research No.: ORS No.: DFY R-1
Amount: $19,980.00
Time period: January 1, 1986   December 31, 1986

2. "Constitutive Relationships for Materials Used at Elevated Temperature,"
Principal Investigator: S.F. Duffy
Agency: State of Ohio
Agency Research No.: ORS No.: DFY R-2
Amount: $9,000.00
Time period: January 1, 1987   June 30, 1987

3. "NASA/ASEE Summer Faculty Fellowship Program"
Agency: NASA Lewis Research Center
Amount: $8,000.00 (stipend)
Time period: June 15, 1987 through September 4, 1987 (renewable for second year).

4. "Reliability Models, Computer Algorithms, and Their Integration With Finite Element Codes"
Principal Investigator: S.F. Duffy (J. H. Hemann, co investigator 1990 1991)
Agency: NASA Lewis Research Center
Agency Research No.:NCC 3-81 ORS No.: DFY R-3
Amount: $199,968.00
Time Period: September 15, 1991   November 24, 1993

5. "Probabilistic Analysis of Mechanical Properties - Continuous Fiber Ceramic Composite"
Principal Investigator: S.F. Duffy
Agency: Babcock & Wilcox - Alliance (Ohio) Research Center
Agency Research No.: ORS No.:  DFY R-5
Amount: $10,000.00
Time Period: October 1, 1993 - December 31, 1994

6. "An Investigation of Reliability Models for Laminated Ceramic Composites and Their Implementation into Finite Element Codes"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-305 ORS No.: DFY R-6
Amount: $230,038.00
Time Period: April 15, 1992 ¿ June 30, 1998

7. "Design Protocols and Analytical Strategies That Incorporate Structural Reliability Models"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-310 ORS No.: DFY R-7
Amount: $128,153.00
Time Period: September 1, 1993   August 31, 1995

8. "Advanced Heat Exchanger - Phase III"
Principal Investigator: S.F. Duffy
Agency: Babcock & Wilcox - Lynchburg (Virginia) Research Center
Agency Research No.: ORS No.: DFY R-8
Amount: $10,000.00
Time Period: February 1, 1994 - May 31, 1994

9. "Design Analysis and Material Modeling for Ceramic Matrix Composites"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-415 ORS No.: DFY R-9
Amount: $264,989.00
Time Period: May 23, 1995 ¿ June 15, 1998

10. "Design Protocols and Analytical Strategies that Incorporate Structural Reliability Models"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-448 ORS No.: DFY R-10
Amount: $27,885.00
Time Period: January 19, 1996   January 18, 1997

11. "Design Methodologies and Computer Algorithms for the Analysis of Components Fabricated from Ceramic Based Material Systems"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-488 ORS No.: DFY R-11
Amount: $223,279.00
Time Period: July 15, 1996 ¿ December  31, 2000

12. "Design Methodologies and Computer Algorithms for the Analysis of Components Fabricated from Ceramic Based Material Systems"
Principal Investigator: S.F. Duffy
Agency: NASA Lewis Research Center
Agency Research No.: NCC 3-761 ORS No.: DFY R-13
Amount: $64,937.00
Time Period: November 1, 1999   October 31, 2000

13. "Curriculum Development:  Work Zone Safety"
Principal Investigator: S.F. Duffy
Agency: US Department of Education
Agency Research No.: P116Z040299 URO No.: DFY R-16
Amount: $248,525.00
Time Period: June 1, 2004   August 31, 2005

14. "Work Zone Safety and Efficiency"
Principal Investigator: S.F. Duffy
Agency: US Department of Transportation
Agency Research No.: URO No.: DFY R-18
Amount: $1,760,000.00 (does not include local matching dollars)
Time Period: July 1, 2006   June 30, 2010

15. "Garrett Morgan Program for Women and Minorities in Transportation"
Principal Investigator: S.F. Duffy
Agency: US Department of Transportation/Shaker Heights School System
Agency Research No.: URO No.: DFY R-19
Amount: $41,833
Time Period: August 15, 2007   July 31, 2008

16. "Modeling Stress Strain Relationships and Predicting Failure Probabilities For Graphite Core Components"
Principal Investigator: S.F. Duffy
Agency: US Department of Energy
Agency Research No.: 09-347 OSPR No.: Duffy23
Amount: $269,849
Time Period: October 1, 2009   September 30, 2012

17. "Elementary Flow at Boulevard: Seeding Inquiry into Engineering"
Co-Principal Investigators: D.K. Jackson, S.F. Duffy
Agency: CHUH School District/US Department of Transportation (Garrett Morgan Program)
Agency Research No.: OSPR No.: Duffy25
Amount: $21,421
Time Period: September 1, 2011   August 31, 2012

18. "Mathematics Achievement as a STEP for STEM Success"
Principal Investigator: J. Holcomb
Co-Principal Investigators: D.K. Jackson, S.F. Duffy, A. Resnick
Agency: National Science Foundation
Agency Research No.: OSPR No.: Holcxx
Amount: $875,628
Time Period: September 1, 2012   August 31, 2017

19. "University Scholars in STEM"
Principal Investigator: L. Gold
Co-Principal Investigators: D.K.  Jackson, S.F. Duffy, J. Scott, N. Sridhar
Agency: National Science Foundation
Agency Research No.: OSPR No.: Goldxx
Amount: $600,000
Time Period:  September 15, 2012   August 31, 2016

20. "Garrett A. Morgan Technology and Transportation Education Program"
Principal Investigator: D.K. Jackson
Co-Principal Investigators: J. Jenkins, S.F. Duffy, O. Tukel
Agency: Cleveland Metropolitan School District (CMSD)/US Department of Transportation
Agency Research No.: OSPR No.: Jackxx
Amount: $48,742
Time Period: TBD

21. "The MC2STEM High School"
Principal Investigator: R. Berkman
Co-Principal Investigators: S.F. Duffy, D.K. Jackson, J. Goodell
Agency: Key Bank Foundation
Agency Research No.: OSPR No.: 200000172
Amount: $675,000
Time Period: January 1,  2013 - December 31, 2016


PUBLICATIONS
Books & Book Chapters
1. "Design Practices for Whisker Toughened Ceramic Components," S.F. Duffy and A.F. Saleeb, in Engineered Materials Handbook Volume 4: Ceramics and Glasses, Samuel J. Snyder tech. ed., ASM International, pp. 733 740, 1991.

2. "Structural Design Methodologies for Ceramic Based Material Systems," S.F. Duffy, A. Chulya, and J.P. Gyekenyesi, Chapter 14 in Flight Vehicle Materials, Structures and Dynamics Technologies   Assessment and Future Directions, eds. A.K. Noor and S.L. Venneri, The American Society of Mechanical Engineers, pp. 265 285, 1992 (also published as NASA TM 103097).

3. Life Prediction Methodologies and Data for Ceramic Materials, ASTM STP 1201, C.R. Brinkman and S.F. Duffy eds., American Society for Testing and Materials, Philadelphia, 1994.

4. "High Temperature Life Prediction of Monolithic Silicon Carbide Heat Exchanger Tubes," J.B. Sandifer, M.J. Edwards, T.S. Brown, and S.F. Duffy, in Life Prediction Methodologies and Data for Ceramic Materials, ASTM STP 1201, C.R. Brinkman and S.F. Duffy eds., American Society for Testing and Materials, Philadelphia, pp. 373-389, 1994.

5. "A Methodology to Predict Creep Life for Advanced Ceramics Using Continuum Damage Mechanics Concepts," T. J. Chuang and S.F. Duffy, in Life Prediction Methodologies and Data for Ceramic Materials, ASTM STP 1201, C.R. Brinkman and S.F. Duffy eds., American Society for Testing and Materials, Philadelphia, pp. 207-227, 1994.

6. "Reliability and Life Prediction of Ceramic Composite Structures at Elevated Temperatures," S.F. Duffy and J.P. Gyekenyesi, in High Temperature Mechanical Behavior of Ceramic Composites, S.V. Nair and K. Jakus, eds., Butterworth-Heineman, Boston, pp. 471-515, 1995.

7. "Issues Relating to Reliability Based Component Design," S.F. Duffy, in Handbook on Discontinuously Reinforced Ceramic Matrix Composites, K. Bowman, S.K. El Rahaiby, and J. Wachtman eds., DoD Ceramics Information Analysis Center Purdue University, pp. 310-355, 1995.

8. "Design with Brittle Materials," S.F. Duffy and L.A. Janosik, in Engineered Materials Handbook: Volume 20 Material Selection and Design, G. Dieter, volume chair, ASM International, pp. 622-638, 1997.

9. "Life Prediction of Structural Components," S.F. Duffy, L.A. Janosik, A.A. Wereszczak, B. Schenk, A. Suzuki, J. Lamon, and D.J. Thomas, in Progress in Ceramic Gas Turbine Development: Volume 2 Ceramic Gas Turbine Component Development and Characterization, M. van Roode, M.K. Ferber, and D.W. Richerson, volume chairs, ASME Press, pp. 553-606, 2003.

10. "Quality Control Using Inferential Statistics In Weibull Based Reliability Analyses," S.F. Duffy and A. Parikh, in  Graphite Testing for Nuclear Applications: The Significance of Test Specimen Volume and Geometry and the Statistical Significance of Test Specimen Population, ASTM STP 1578, N. Tzelepi and M. Carroll eds., American Society for Testing and Materials, West Conshohocken, PA, pp. 1-18, 2014.


Refereed Journal Articles
1. "A Viscoplastic Constitutive Theory for Transversely Isotropic Materials," D.N. Robinson,  S.F. Duffy and J.R. Ellis, in Third Symposium on Nonlinear Relations for High Temperature Applications, NASA CP 10010, Akron, Oh., pp. 7 25, June, 1986.

2. "A Viscoplastic Constitutive Theory for Metal Matrix Composites at High Temperature," D.N. Robinson, S.F. Duffy and J.R. Ellis, in 1987 Pressure Vessels and Piping Conference, PVP Vol. 123, San Diego, Ca., pp. 49 56, June, 1987 (also published as NASA CR-17953).

3. "A Continuum Deformation Theory for Metal Matrix Composites at High Temperature," D.N. Robinson and S.F. Duffy, Journal of Engineering Mechanics, Vol. 116, No. 4, pp. 832 844, April, 1990.

4. "A Unified Inelastic Constitutive Theory for Sintered Powder Metals," S.F. Duffy, Mechanics of Materials, Vol. 7, No. 3, pp. 245 254, December, 1988.

5. "Noninteractive Macroscopic Statistical Failure Theory for Whisker Reinforced Ceramic Compos¬ites," S.F. Duffy and S.M. Arnold, Journal of Composite Materials, Vol. 24, No. 3, pp. 293 308, March, 1990.

6. "Noninteractive Macroscopic Reliability Model for Ceramic Matrix Composites with Orthotropic Material Symmetry," S.F. Duffy and J.M. Manderscheid, Journal of Engineering for Gas Turbines and Power, Vol. 112, No. 4, pp. 507 511, October, 1990 (also published as NASA TM 101414).

7. "Analysis of Whisker Toughened Ceramic Components   A Design Engineer's Viewpoint," S.F. Duffy, J.M. Manderscheid, and J.L. Palko, Ceramic Bulletin, Vol. 68, No. 12, pp. 2078 2083, December, 1989 (also published as NASA TM 102333).

8. "Extension of a Noninteractive Reliability Mod for Ceramic Matrix Composites," S.F. Duffy, R.C. Wetherhold, and L.K. Jain, Transactions of the ASME   Journal of Engineering for Gas Turbines and Power, Vol. 115, No. 1, pp. 205 207, January, 1993 (also published as NASA CR 185267).

9. "Structural Reliability Analysis of Laminated CMC Components," S.F. Duffy, J.L. Palko, and J.P. Gyekenyesi, Transactions of the ASME   Journal of Engineering for Gas Turbines and Power, Vol. 115, No. 1, pp. 103 108, January, 1993 (also published as NASA TM 103685).

10. "Reliability Analysis of Structural Components Fabricated from Ceramic Materials Using a Three Parameter Weibull Distribution," S.F. Duffy, L.M. Powers, and A. Starlinger, Transactions of the ASME   Journal of Engineering for Gas Turbines and Power, Vol. 115, No. 1, pp. 109 116, January, 1993 (also published as NASA TM 105370).

11. "Analysis of Whisker Toughened CMC Structural Components Using an Interactive Reliability Model," S.F. Duffy and J.L. Palko, AIAA Journal, Vol. 32, No. 5, pp. 1043-1048, May, 1994 (also published as NASA CR 190755).

12. "Reliability Analysis of Laminated Ceramic Matrix Composites Using Shell Subelement Techniques," A. Starlinger, D.J. Thomas, S.F. Duffy, and J.P. Gyekenyesi, AIAA Journal, Vol. 31, No. 11, pp. 2181-2183, November, 1993 (also published as NASA TM 105413).

13. "Reporting Strength Data and Estimating Weibull Distribution Parameters for Advanced Ceramics," S.F. Duffy, G.D. Quinn and C.A. Johnson, ASTM Standard Practice C 1239   94.

14. "Parameter Estimation Techniques Based on Optimizing Goodness of Fit Statistics for Structural Reliability," A. Starlinger, S.F. Duffy, and J.L. Palko, Proceedings of the 10th Biennial Conference on Reliability, Stress Analysis, and Failure Prevention, DE-Vol. 55, R.J. Schaller ed., ASME, Albuquerque, NM, pp. 65-77, September, 1993.

15. "Composites Research at NASA Lewis Research Center," S.R. Levine, S.F. Duffy, A. Vary, M.V. Nathal, R.V. Miner, S.M. Arnold, M.G. Castelli, D.A. Hopkins, and M.A. Meador, Composites Engineering, Vol. 4, No. 8, pp. 787-810.

16. "Trends in the Design and Analysis of Components Fabricated From CFCCs," S.F. Duffy, J.L Palko, J.B Sandifer, C.L. DeBellis, M.J. Edwards, and D.L Hindman, Transactions of the ASME   Journal of Engineering for Gas Turbines and Power, Vol. 119, No. 1, pp. 1 6, January, 1997.

17. "An Overview of Engineering Concepts and Current Design Algorithms for Probabilistic Structural Analysis," S.F. Duffy, J. Hu, and D.A. Hopkins, in Proceedings of the 1995 Design Engineering Technical Conferences - Volume 2, DE-Vol. 83, Boston, Massachusetts, pp. 3-16, September, 1995.

18. "A Viscoplastic Constitutive Theory for Monolithic Ceramics - I," L.A. Janosik and S.F. Duffy, Transactions of the ASME   Journal of Engineering for Gas Turbines and Power, Vol. 120, No. 1, pp. 155 161, January, 1998.

19. "Weibull Analysis Effective Volume and Effective Area for a Ceramic C ¿ Ring Test Specimen," S.F. Duffy, E.H. Baker, A.A. Wereszczak and J.J. Swab,  ASTM Journal of Testing and Evaluation, Vol. 33, No. 4, pp 233-238, July 2005.

20. "Strength of a Ceramic Sectored Flexural Test Specimen," A.A. Wereszczak, S.F. Duffy, E.H. Baker, J.J. Swab, and G.J. Champoux,  ASTM Journal of Testing and Evaluation, Vol. 36, No. 1, pp 17-23, January 2008.

21. "Simulator Study of Precipitating Factors for Work Zone Crashes," D. McAvoy, S.F. Duffy and H.S. Whiting, Transportation Research Board: Journal of the Transportation Research Board, Vol. 2258, pp 32-39, 2012.
22. "Implanted Renal Replacement for End-Stage Renal Disease, " S. Roy, K.G. Goldman, R.E. Marchant, A.L. Zydney, D.L. Brown, A.J. Fleischman, A.T. Conlisk, T.A. Desai, S. Duffy, H.D. Humes, and W.H. Fissell, Panminerva Medica, Volume 53, No. 3, pp. 153-166, September 2011.


Industry Standards
1. "Standard Practice for Reporting Uniaxial Strength Data and Estimating Weibull Distribution Parameters for Advanced Ceramics," S.F. Duffy, G. Quinn, and C. Johnson, ASTM Designation: C 1239, (1995, 2000, 2005).

2. "Fine Ceramics (Advanced Ceramics, Advanced Technical Ceramics) - Weibull Statistics for Strength Data," S.F. Duffy, ISO Designation: FDIS 20501, (2003).

3. "Size Scaling Of Tensile Strengths Using Weibull Statistics For Advanced Ceramics," S.F. Duffy, G. Quinn, E.H. Baker and J.A. Salem, ASTM Designation: C wwww, (2008).

4. "Reporting Uniaxial Strength Data And Estimating Weibull  Distribution Parameters For Graphite," S.F. Duffy,  and C. James, ASTM Standard (Passed ASTM society ballot fall 2012).

Other Publications
1. "Whisker Reinforced Ceramic Composites for Heat Engine Components," S.F. Duffy, in Lewis Structures Technology - 1988: Vol. 3, NASA CP 3003, Cleveland, Oh., pp. 21 40, May, 1988.

2. "Time Dependent Reliability Model Incorporating Continuum Damage Mechanics for High Temperature Ceramics," S.F. Duffy and J.P. Gyekenyesi, NASA TM 102046, May, 1989.

3. "CCARES   A Computer Algorithm for the Reliability Analysis of Laminated CMC Components," S.F. Duffy and J.P. Gyekenyesi, HITEMP Review 1990, Advanced High Temperature Engine Materials Technology Program, NASA CP 10051, Cleveland, Oh., pp. 77 1 through 77 9, October, 1990.

4. "Micromechanics Based Constitutive Relations for Creep of SiC/RBSN Composites," B.B. Hill, H.T. Hahn, C.E. Bakis, and S.F. Duffy, HITEMP Review 1991, Advanced High Temperature Engine Materials Technology Program, NASA CP 10082, Cleveland, Oh., pp. 58 1 through 58 13, October, 1991.

5. "High-Temperature Life Prediction of Monolithic Silicon Carbide Heat Exchanger Tubes," M.J. Edwards, J.B. Sandifer, S.F. Duffy and T.S. Brown III, Ceramic Engineering & Science Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, D.C. Cranmer - Program Chair, January 10-15, 1993, Cocoa Beach, Florida, The American Ceramic Society, Westerville, Ohio, pp. 312-313.

6. "Design of a Laminated CMC Heat Exchanger Using the C/CARES Algorithm," J.L. Palko and S.F. Duffy, HITEMP Review 1993, Advanced High Temperature Engine Materials Technology Program, NASA CP 19117, Cleveland, Oh., pp. 75 1 through 75 8, October, 1993.

7. "A Creep Life Prediction Model for Continuous Fiber Reinforced Ceramic Composites," T.-J. Chuang and S.F. Duffy, HITEMP Review 1993, Advanced High Temperature Engine Materials Technology Program, NASA CP 19117, Cleveland, Oh., pp. 77 1 through 77 17, October, 1993.

8. "Reliability Analysis of Single Crystal NiAl Turbine Blades," J.L Palko, S.F. Duffy, J.A. Salem, R.D. Noebe, F. Holland, D.R. Wheeler, P.K. Wright, HITEMP Review 1994, Advanced High Temperature Engine Materials Technology Program, NASA CP 10146, Cleveland, Oh., pp. 56 1 through 56 11, October, 1994.

9. "A Viscoplastic Constitutive Theory for Monolithic Ceramics - II," L.A. Janosik and S.F. Duffy, ASME ¿GT -  (October, 1998)

10. "C-Ring Strength of Advanced Ceramics," A.A. Wereszczak, R.J. Caspe, , J.J. Swab, S.F. Duffy and E.H. Baker, Ceramic Engineering & Science Proceedings of the 27th International Conference on Advanced Ceramics and Composites:B, W.M. Kriven and H.T. Lin, editors, January 26-31, 2003, Cocoa Beach, Florida, The American Ceramic Society, Westerville, Ohio, pp 483-490.

11. "Designing Advanced Ceramic Parts That Last," ANSYS Solutions Magazine,  Vol 7, Issue 1, pp. 9-12, January 2006.


Selected Contract Reports
1. "Finite Element Model and Analysis of Glass Sprinkler Bulb," R.L. Lehman and S.F. Duffy, November, 1994 - Central Sprinkler Corporation.

2. "Effect of Applied Torque on The Reliability of Glass Sprinkler Bulb," R.L. Lehman and S.F. Duffy, November, 1994 - Central Sprinkler Corporation.

3. "Parameter Estimation for the Two- and Three-Parameter Weibull Distribution - Bimonthly Reports #1 through #6," S.F. Duffy, V.J. Tennery, E.H. Baker and J.L. Palko, February through December, 1996 - Lockheed Martin Energy Systems.

4. "Structural Analysis: Bridge Demolition & Erection - ODOT Project #337-96, Bridge SAN-6-17.51, Sandusky County, " S.F. Duffy and J.A. Recktenwald, June, 1996 - The Great Lakes Construction Company.

5. "Structural Analysis: Bridge Demolition & Erection - ODOT Project #419-96 Bridge CUY-21-09.49 Cuyahoga County, " S.F. Duffy and J.A. Recktenwald, August, 1996 - The Great Lakes Construction Company.