John J. Tierney SCIENTIST 109 Composites Manufacturing Science Laboratory University of Delaware Newark, DE 19716-3144 Phone: (302) 831-0548 | Fax: (302) 831-8525 Email: jtierney@udel.edu

Research Interests: Composite materials, simulation and design of composites manufacturing processes, experimental mechanics, fracture mechanics, residual stress and warpage analysis, joining, induction lamination, automated tow placement, fusion bonding, software development for composite manufacturing processes.

Executive Summary

Dr. John Tierney is a Scientist at the Center for Composite Materials in the University of Delaware. Dr Tierney holds a Ph.D. in Materials Science and Engineering from the University and has an honors Bachelors degree in Mechanical Engineering from the National University of Ireland. Dr. Tierney has extensive experience in design and processing of composites and has been conducting ongoing research for innovative processing methods for manufacturing composites parts, which include automated tow placement, induction lamination, VARTM processing, autoclave manufacturing, high temperature filament winding and infrared thermoforming. His work has focused on modeling material behavior as well as process optimization for manufacturing composites using numerous analytical and FEA based methods.

Dr. Tierney was lead design engineer on optimal design of lightweight 105mm  and 120mm composite overwrapped gun tubes as part of ARL’s Future Combat Systems program with ARL and Picatinny Arsenal. He co-invented the Rapid Induction Lamination Process (RAIL) for facilitating the high speed production of the M829E3 sabot at ATK rocket center. He was also involved with design of high tension thermoplastic overwrapped ceramic cylinders for lightweight gun tubes. He was design lead on a composite replacement parts project for the Orion P3 with ONR-NAVAIR using elevated temperature carbon based fabric composites. He is currently involved with continuous MMC processing using ultrasonic welding, and on the development of a high energy drop tower for armored panel testing.

Dr. Tierney is lead software engineer at UD-CCM and developed a generic set of design tools called CDS (Composite Design and Simulation Software) which represents the core of all analytical software tools for composites processing, mechanics and design at CCM. These applications are currently distributed to ARL, other DoD agencies as well as industry and academic institutions worldwide.

Dr. Tierney is proficient in CATIAv5 as well as a number of FEA commercial packages that include Patran/Nastran, Abaqus, ANSYS as well as FiberSIM, Abaqus for Catia (AFC) and  MSC.SimDesigner. He often presents workshops to industry on how to apply these tools for composite design and analysis.

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Education

• Ph.D. University of Delaware, 2003.
• B.E. (mech) University College Galway, Ireland 1994.

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Professional Activities

• Journal Reviewer: Journal of Thermoplastic Composite Materials, Composites: Part (A), and Journal of Composite Materials.
  
• Center for Composite Materials Spring research review organizer.
  
• President of University of Delaware’s International Student Organization: The Cosmopolitan Club 1999-2000
• Member of Engineering Society of Ireland. Member of American Society of Materials, American Society of Composites

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Awards & Patents

• CCM Directors Award 2007, CCM Achievement Award 1998, UD Honors Award 1998.
  
• Tierney, J. J., Clews, J., Yarlagadda, S., Gillespie, J. W. Jr., "Automated Tape Placement of Electrical Conductive Composites Using Localized Induction Heating". Disclosure Sept. 2004.
  
• Tierney, J. J., Gerhard, J. K., Lynam, E. J., Shaffer, M. R., Yarlagadda, S., Shevchenko, N. B., Fink, B. K., Heider D., Gillespie, J. W. Jr., "Apparatus and Method for Induction Lamination of Electrically Conductive Fiber Reinforced Composite Materials ". U. S. Patent Number 6,881,374, April 19, 2005.
  
• Gerhard, J. K., E. J. Lynam, M. R. Shaffer, S. Yarlagadda, N. B. Shevchenko, B. K. Fink, D. Heider, J. J. Tierney, J. W. Gillespie, Jr., "Apparatus and Method for Induction Lamination of Electrically Conductive Fiber-Reinforced Composite Materials," U. S. Patent No.7,419,373, issued September 2, 2008.
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Books and Book Chapters

• Tierney, J. J., J. W. Gillespie Jr., and P-E. Bourban, “Joining of Composites,” Chapter in Volume 2, Polymer-Matrix Composites, Comprehensive Composite Materials, Pergamon, Elsevier Science Limited, 2001

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Recent Journal Publications

• Tierney, J.J., Gillespie, J. W. Jr., “Modeling of In-Situ Strength Development for the Thermoplastic Composite Tow Placement Process”, Journal of Composite Materials, vol. 40, No 16, pp. 1487-1506, (2006).
• John Tierney, J. W. Gillespie Jr., “Modeling of Heat Transfer and Void Dynamics for the Thermoplastic Composite Tow Placement Process”, accepted, Journal of Composite Materials, Technomic Pub. Co. 2003
• John Tierney, J. W. Gillespie Jr., “Crystallization Kinetics Behavior of PEEK Based Composites Exposed to High Heating and Cooling Rates:, to appear, Composites Part (A), Elsevier Publishing Co. 2003
• Heider D., Tierney, J. J., Michael J. Piovoso, and John W. Gillespie Jr., “Artificial Neural Network Modeling of the Automated Thermoplastic Composite Tow-Placement system” in Journal of Materials Processing and Manufacturing Science, Vol. 7 No. 4 pp. 360-379, 1999.

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Recent Conference Papers

• Tierney, J. J. , J. W. Gillespie, Jr., " Composite Design and Simulation (CDS) Software: A Comprehensive Toolkit for Real-Time Design of Composite Processes and Structures" SAMPE Baltimore, May18-21st , (2009).
• Tierney, J. J., M. A. Lamontia and M. B. Gruber , J. W. Gillespie, Jr., B.J. Jenson and R J. Cano, “Modeling the Accudyne Thermoplastic In Situ ATP Process”, JEC-SAMPE Europe Conf. (2009).
• Tierney, J. J., M. A. Lamontia and M. B. Gruber , J. W. Gillespie, Jr., B.J. Jenson and R J. Cano, “In Situ Thermoplastic ATP Needs Flat Tapes and Tows with Few Voids”, JEC-SAMPE Europe Conf. (2009)
• T. A. Bogetti,  Tierney J.J, Staniszewski, J., B. P. Burns, C. P. R. Hoppel, J. W. Gillespie, Jr., "Predicting The Nonlinear Response and Progressive Failure Of Composite Laminates under Tri-Axial Loading", to appear: 17th Int. Conference on Composite Materials: ICCM-17, Edinburgh  (2009).
• Tierney, J. J. , J. W. Gillespie, Jr., " Composite Design and Simulation (CDS) Software: A Comprehensive Toolkit for Real-Time Design of Composite Processes and Structures" SAMPE Baltimore, May18-21st , (2009).
• Tierney, J. J., M. A. Lamontia and M. B. Gruber , J. W. Gillespie, Jr., B.J. Jenson and R J. Cano, “Modeling the Accudyne Thermoplastic In Situ ATP Process”, JEC-SAMPE Europe Conf. (2009).
• Tierney, J. J., M. A. Lamontia and M. B. Gruber , J. W. Gillespie, Jr., B.J. Jenson and R J. Cano, “In Situ Thermoplastic ATP Needs Flat Tapes and Tows with Few Voids”, JEC-SAMPE Europe Conf. (2009)
• T. A. Bogetti,  Tierney J.J, Staniszewski, J., B. P. Burns, C. P. R. Hoppel, J. W. Gillespie, Jr., "Predicting The Nonlinear Response and Progressive Failure Of Composite Laminates under Tri-Axial Loading", to appear: 17th Int. Conference on Composite Materials: ICCM-17, Edinburgh  (2009).
• Heider, D., Schulze, Tierney, J.J., P., Deffor, H., Gillespie, J. W., "Design and Fabrication of VARTM Fabricated Skin Panels with Integrated Hollow Hat Stiffeners", 13th European Conf. on Composite Materials, KTH, Stockholm, Sweden June, (2008).
• Tierney, J.J., Heider, D. Gillespie, J. W., Jr., "Thermal Mismatch Issues between Composite -Aluminum Interfaces in Aircraft Structural Design, Int. SAMPE Conf. Vol. 52 , (2008)
• D. Heider, P. Schulze, T. Reitz, M. Finger, J.J. Tierney, & J.W. Gillespie, Jr., "VARTM Fabricated Skin Panels with Integrated Hollow Stiffeners, SAMPE Conf. Vol. 52, (2008)
• Tierney, J.J., Lou. K. (Armorworks) Richard Goetz, (TARDEC), “Optimization of Fastener System Design for Blast Protection Appliqués” at 78th Shock and Vibration Symposium, Philadelphia, PA, Nov (2007).
• Tierney, J.J., Byron, D., McElroy, H., Cytron, S., Gillespie, J. W. Jr., “Design of a Lightweight Ceramic Gun Barrel with a High Tension Thermoplastic Composite Overwrap”, ASC 20th Annual Technical Conference, Philadelphia, PA (2005).  
• Tierney, J.J, Andersen, S., Yarlagadda, S., Gillespie J.W. Jr., Hyland, E., Crayon, D.,  Littlefield, A., Tzeng J., &  Burton, L., “Optimal Design of Cylindrical Steel/Composite Hybrid Structures for Gun Barrel Applications”, SAMPE Sym. pp. 3267-3281 (2005).
• Tierney, J. J., Yarlagadda, S., Shevchenko, N., D. Heider, Gillespie, J. W Jr., “Rapid Automated Induction Lamination (RAIL) of Carbon/Thermoplastic Laminates: Process Optimization and Prove-out”, Proceedings 22nd Int. SAMPE Europe Conf, pp. 193-206, (2001).
• Tierney, J. J. Yarlagadda, S., Shevchenko, N., D. Heider, Gillespie, J. W. Jr., “Rapid Automated Induction Lamination (RAIL) of Carbon/Thermoplastic Laminates: Factory Implementation and Prove-Out”, SAMPLE Int. Symposium vol. 46 pp. 886-897, (2001).
• Tierney, J. J., Yarlagadda, S., Heider D., J. W. Gillespie Jr., N. B. Shevchenko, B. K. Fink, “Rapid Automated Induction Lamination (R.A.I.L) for High-Volume Production of Carbon/Thermoplastic Laminates,” Proc. SAMPE-ACCE-DOE-SPE, Midwest Advanced Materials and Processing Conference, Sept 12-14, Dearborn, MI, , pp 393-402, (2000).
• Tierney, J. J., Heider D., Piovoso, M. J., and J. W. Gillespie Jr., “Artificial Neural Network Modeling of the Automated Thermoplastic Composite Tow-Placement system” in Journal of Materials Processing and Manufacturing Science, Vol. 7 No. 4 pp. 360-379, (1999).
• Tierney, J. J., Gillespie J. W. Jr. "Control of Warpage and Residual Stresses during the Automated Tow Placement Process" 43rd Int. SAMPE Conf, vol. 43 no. 1 pp. 652-664 (1998).
• Tierney, J. J., S. Quirico, and J. W. Gillespie, Jr. Development of Material Quality during the Automated Tow Placement Process, ASC 13th Tech. Conf., Baltimore,  pp. 1467-1479 (1998).
• Tierney, J. J., Gillespie, J. W. Jr. "Control of Warpage and Residual Stresses during the Automated Tow Placement Process" Proc. of ANTEC’ 98, pp. 2356–2360, Society of Plastics Engineers, Brookfield, CT, (1998).
• Tierney, J. J., D. Heider, R. C. Don, K. Steiner. J. W. Gillespie Jr. "Welding of Thermoplastic Composites using the Automated Tow Placement Process: Modeling and Control" vol. 1, ANTEC’97 pp. 1165-1170, (1997).
• Tierney, J. J., R. F. Eduljee, J. W. Gillespie. "Residual Stress and Warpage Development during the Automated Tow Placement Process". Proc. 11th Tech. Conf. on Composites, ASC, pp. 777-786, (1996).
• Tierney, J. J., R. F. Eduljee, and J. W. Gillespie Jr., “Material Response during Robotic Tow Placement of Thermoplastic Composites,” Proc. of the 11th Annual Advanced Composites Conf., pp. 315–329 (1995)
  

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