Dr. Stelios Kyriakides, P.E.

Professor of Aerospace Engineering and Engineering Mechanics

Director, Research Center for Mechanics of Solids, Structures & Materials

Brief Narrative

Professor Kyriakides received a B.Sc. degree in Aeronautical Engineering with first class honors in 1975 from the University of Bristol in the U.K. and graduate degrees in Aeronautics, with specialty in the mechanics of solids, from the California Institute of Technology (M.S. 1976, Ph.D. 1980). He joined the University of Texas at Austin in September 1980 where he was promoted to Associate Professor in 1985 and to Professor in 1989.

Dr. Kyriakides' major technical interests are in the mechanics of solids with an emphasis on instability at both the macro (structural) and micro (material) levels. His work is motivated by practical problems and usually involves combined experimental, analytical and numerical efforts. He has pioneered the area of propagating instabilities in solids, structures and materials. Such instabilities have been shown to govern the mechanical behavior of structures of larger size such as offshore pipelines, oil well casings and tunnel linings, long panels in pressure loaded structures, etc. This work was summarized in a monograph in the Advances in Applied Mechanics in 1993.

More recently, the problem area has seen a major expansion when it was shown that propagating necks in polymers, the compressive response and the spreading of crushing in cellular materials, propagating failure zones in the form of kink bands in composites, the propagation of phase transition fronts in shape memory alloys etc. are governed by the same underlying fundamental mechanism. Each of these problems is currently under study in his laboratory.

Kyriakides was recognized with the Presidential Young Investigator Award in 1984. Prompted by a requirement of this award, he started a long and productive involvement with the offshore oil and gas production industry. He has worked extensively on problems of plastic buckling of tubular structures used as pipelines, well casings, platform legs, tethers and downhole tubulars. Together with his students, he investigated this class of problems in depth and developed experimental data bases and analytical and numerical models which for several problems have become the benchmarks worldwide. Analysis of this class of practical problems starts with evaluation of the manufacturing procedures at the steel mills, of the procedures for installing them in the sea and end with evaluation of the performance of the structures under the operational loads they are exposed to. This volume of work has taken Kyriakides world wide (Brazil, Canada, Denmark, France, Germany, Israel, Italy, Japan, Norway, Portugal, The U.K., The Netherlands, Portugal) as a scholar but also as consultant to major oil companies, steel companies, construction companies etc.

CURRENT ADDRESS:
Center for Mechanics of Solids, Structures & Materials, WRW 110
The University of Texas at Austin, Austin, Texas 78712
Tel. (512) 471-5963, Fax. (512) 471-5500,

E-MAIL: skk@mail.utexas.edu

EDUCATION:

ACADEMIC POSITIONS:

HONORS AND AWARDS:

o Fellow of the American Academy of Mechanics (1999)
o Temple Foundation Endowed Professorship No. 1 UT-Austin (1999-present)
o Fellow of the American Society of Mechanical Engineers (1997)
o Hayden Head Professorship in Engineering, UT-Austin (1996-99)
o Walter L. Huber Civil Engineering Research Prize 1992
o Outstanding Paper Award, ASME Div. Offshore Mechanics and Arctic Engineering, 1991
o Department of ASE/EM Excellence in Teaching Award, 1989-90.
o Presidential Young Investigator Award, National Science Foundation, 1984-1989.
o Engineering Foundation Centennial Teaching Fellowship, UT-Austin (1984 - 1996).
o Hele-Shaw Prize for 1974-1975 for Outstanding Academic Performance, University of Bristol, U.K..

EDITORIAL BOARDS:

o Journal of Composite Materials
o International Journal of Plasticity
o International Journal of Non-linear Mechanics
o ASME Journal of Applied Mechanics (1994-2000)

NATIONAL AND INTERNATIONAL COMMITTEES:

o 7/02-6/03 - Chair Executive Committee, Applied Mechanics Division, ASME
o 7/1999-6/2002, Member Executive Committee, Applied Mechanics Division, ASME
o 1998 - Present, Member-at-Large US National Committee on Theoretical and Applied Mechanics (NRC)
o 3/1993- 6/1996, ASME, Applied Mechanics Division, Founding Chairman of Technical Committee Instability in Solids and Structures
o 1996-present, ASME, Applied Mechanics Division, Secretary of Technical Committee Instability in Solids and Structures
o Co-Chair and organizer IUTAM Symposium: Material Instabilities and the Effect of Microstructure. Austin, TX, May 7-11, 2001

RESEARCH INTERESTS:

Instability in Solids, Structures and Materials.
Solid Mechanics, Composite Materials, Plasticity

Current Projects
Nolinear Behavior and Failure of Fiber Composites
Large Deformation Behavior of Cellular Materials
Material Characterization in Shape Memory Alloys
On the Dynamics and Arrest of Propagating Instabilities in Structures
Cyclic Plasticity and Cyclic Degradation of Structures
Stability Problems of Deep Water Tubular Structures
Optimization of Cold Forming of Aluminum Extrusions
Hydroforming of Tubular Components
Mechanics of Offshore Pipelines

RECENT PUBLICATIONS

a. Monographs:

Kyriakides, S., "Propagating Instabilities in Structures." In Advances in Applied Mechanics, Ed. by J.W. Hutchinson and T.Y. Wu, Vol. 30, pp. 67-189, Academic Press, Boston, MA, Oct. 1993.

b. Journal Papers:

Lee, L.-H. and Kyriakides, S., "On the Arresting Efficiency of Slip-On Buckle Arrestors for Offshore Pipelines." Int'l J. Mechanical Sciences (submitted).

Aguirre, F., Kyriakides, S. and Yun, H.D., "Bending of Steel Pipes with Lüders Bands." Int'l J. Plasticity (to appear).

Kyriakides, S., Corona, E. and Miller, J.E., "Effect of Yield Surface Evolution Bending Induced Cross Sectional Deformation of Thin-Walled Sections." Int'l J. Plasticity (to appear).

Miller, J.E. and Kyriakides, S., "Three-Dimensional Effects of the Bend-Stretch Forming of Aluminum Tubes." Int'l J. Mechanical Sciences 45:1, 115-140, 2003.

Kyriakides, S. and Netto, T.A. "Dynamic Propagation and Arrest of Buckles in Pipe-In-Pipe Systems." In, Proceedings Offshore Mechanics and Arctic Engineering '02 Conference, Oslo, Norway, June 2002.

Bardi, F.C., Yun, H. and Kyriakides, S., "On the Axisymmetric Progressive Crushing of Circular Tubes in Compression." Int'l Journal of Solids & Structures 40, 3137-3155, 2003.

Kyriakides, S., "Propagating Instabilities in Materials." In, Materials Science for the 21th Century, Society of Materials Science, Japan, Vol. 1, pp. 316-325, May 2001

Kyriakides, S., "Buckle Propagation in Pipe-in-Pipe Systems. Part I Experiments." Int'l Journal of Solids & Structures 39:2, 351-366, 2002.

Kyriakides, S. and Vogler, T.J. "Buckle Propagation in Pipe-in-Pipe Systems. Part II Analysis." Int'l Journal of Solids & Structures 39:2, 367-392, 2002.

Olso, E. and Kyriakides, S., "Internal Ring Buckle Arrestors for Pipe-in-Pipe Systems." Int'l Journal of Nonlinear Mechanics 38:2, 267-284, 2003

Kyriakides, S., "Efficiency Limits for Slip-On Type Buckle Arrestors for Offshore Pipelines." ASCE Journal Engineering Mechanics 128:1, 102-111, 2002.

Kyriakides, S. and Miller, J.E., "On the Propagation of Lüders Bands in Steel Strips." ASME J. Applied Mechanics 67, 645-654, 2000.

Miller, J.E. and Kyriakides, S., "Stretch Forming of Rectangular Aluminum Tubes for Automotive Applications." In Proceedings of the International Body and Engineering Conference, Detroit, MI October 2-5, 2000.

Corona, E. and Kyriakides, S., "Asymmetric Collapse Modes of Pipes Under Combined Bending and External Pressure." ASCE J. Engineering Mechanics 126:12, 1232-1239, 2000.

Vogler, T.J. and Kyriakides, S., "On the Initiation and Growth of Kink Bands in Fiber Composites: Part I Experiments." Int' l J. Solids & Structures 38:15, 2639-2651, 2001

Vogler, T.J., Hsu, S.-Y. and Kyriakides, S., "On the Initiation and Growth of Kink Bands in Fiber Composites: Part II Analysis." Int'l J. Solids & Structures 38:15, 2653-2682, 2001

Miller, J.E., Kyriakides, S. and Bastard, A.H. "On Bend-Stretch Forming of Aluminum Extruded Tubes: Part I Experiments." Int'l J. Mechanical Sciences 43, 1283-1317, 2001.

Miller, J.E., Kyriakides, S. and Corona, E. "On Bend-Stretch Forming of Aluminum Extruded Tubes: Part II Analysis." Int'l J. Mechanical Sciences 43, 1319-1338, 2001.

Kyriakides, S. and Netto, T. A. "On the Dynamics of Propagating Buckles in Pipelines." Int'l Journal of Solids & Structures 37:46-47, 6843-6867, 2000

Vogler, T.J , Hsu, S.-Y. and Kyriakides, S. "Composite Failure Under Combined Compression and Shear." Int'l J. Solids & Structures 37:12, 1765-1791, 2000.

Netto, T.A. and Kyriakides, S., "Dynamic Performance of Integral Buckle Arrestors for Offshore Pipelines. Part I Experiments." Int'l Journal of Mechanical Sciences 42:7, 1405-1423, 2000

Netto, T.A. and Kyriakides, S., "Dynamic Performance of Integral Buckle Arrestors for Offshore Pipelines. Part II Analysis." Int'l Journal of Mechanical Sciences 42:7, 1425-1452, 2000

Netto, T.A., Kyriakides, S. and Ouyang, X. "On the Initiation and Propagation of Buckles on a Beam on a Nonlinear Foundation." ASME J. Applied Mechanics 66:2, 418-426, 1999.

Vogler, T.J. and Kyriakides, S. "Inelastic Behavior of an AS4/PEEK Composite Under Combined Transverse Compression and Shear: Part I Experiments." Int'l J. Plasticity 15, 783-806, 1999

Hsu, S.-Y., Vogler, T.J. and Kyriakides, S. "Inelastic Behavior of an AS4/PEEK Composite Under Combined Transverse Compression and Shear: Part II Modeling." Int'l J. Plasticity 15, 807-836, 1999

Papka, S.D. and Kyriakides, S., "In-Plane Biaxial Crushing of Honeycombs: Part I Experiments." Int'l Journal of Solids & Structures 36:29, 4367-4396, 1999.

Papka, S.D. and Kyriakides, S., "In-Plane Biaxial Crushing of Honeycombs: Part II Analysis." Int'l Journal of Solids & Structures 36:29, 4397-4423, 1999.

Vogler, T.J and Kyriakides, S., "On the Axial Propagation of Kink Bands in Fiber Composites. Part I Experiments." Int'l Journal of Solids & Structures 36, 557-574, 1999.

Hsu, S.-Y., Vogler, T.J and Kyriakides, S., "On the Axial Propagation of Kink Bands in Fiber Composites. Part II Analysis." Int'l Journal of Solids & Structures 36, 575-595, 1999

Netto, T.A. and Kyriakides, S., "Dynamic Performance of Integral Buckle Arrestors for Offshore Pipelines." In, Proceedings Offshore Mechanics and Arctic Engineering '98 Conference, Lisbon, Portugal, July 1998.

Shaw, J.A and Kyriakides S. "Initiation and Propagation of Localized Deformation in the Pseudoelastic Response of NiTi." Proceedings, ASCE Engineering Mechanics Conference, San Diego, CA, March 1998.

Vogler, T. J. and Kyriakides, S., "On the Effect of Loading Rate on the Compressive Strength of an AS4/PEEK Composite." ASME Journal of Applied Mechanics 65:4, 1056-1058, 1998

Papka, S.D. and Kyriakides, S., "Experiments and Full-Scale Numerical Simulations of In-Plane Crushing of a Honeycomb." Acta Materialia 46:8, 2765-2776, 1998

Papka, S. D. and Kyriakides, S., "In-plane Crushing of a Polycarbonate Honeycomb." In, Proceedings IUTAM Symposium Material Instabilities in Solids, June 1997, Delft, Ed. R. de Borst and E. van der Giessen, Wiley, Chichester, England, 1998, pp. 159-183.

Hsu, S.-Y., Vogler, T. J. and Kyriakides, S., "Compressive Strength Predictions for Fiber Composites." ASME Journal of Applied Mechanics 65:1, 7-16, 1998

Shaw, J. A. and Kyriakides, S., "Initiation and Propagation of Localized Deformation in Elasto-Plastic Strips Under Uniaxial Tension." Int'l Journal of Plasticity 13:10, 809-835, 1998

Kyriakides, S., Park, T.-D. and Netto, T.A., "On the Design of Integral Buckle Arrestors for Offshore Pipelines. Proc. BOSS'97 Ed. J.H. Vugts, Vol. 1, 277-289, Pergamon (Elsevier Sciences) 1997. Also, Applied Ocean Research 20, 95-114, 1998.

Papka, S.D. and Kyriakides, S., "In-plane Crushing of a Polycarbonate Honeycomb." Int'l Journal of Solids & Structures 35, 239-267, 1998.

Vogler, T.J. and Kyriakides, S., "Initiation and Axial Propagation of Kink Bands in Fiber Composites." Acta Materialia 45:6, 2443-2454, 1997.

Kyriakides, S. and Ruff, A. E., "Aspects of Failure and Postfailure of Fiber Composites in Compression." Journal of Composite Materials 31:20, 2000-2037, 1997.

Park, T.-D. and Kyriakides, S., "On the Design of Integral Buckle Arrestors for Offshore Pipelines." Int'l Journal of Mechanical Sciences 39:6, 643-669, 1997

Shaw, J.A. and Kyriakides, S., "On the Nucleation and Propagation of Phase Transformation Fronts in a NiTi Alloy." Acta Materialia 45:2, 683-700, 1997

Power, T.L. and Kyriakides, S., "Circumferential Stiffeners as Buckle Arrestors in Long Panels." Int'l Journal of Solids and Structures 33, No. 13, 1837-1851, 1996.

Shaw, J.A. and Kyriakides, S., "Thermomechanical Aspects of NiTi." Journal of the Mechanics and Physics of Solids 43, 1243-1281, 1995.

Park, T.-D. and Kyriakides, S., "On the Collapse of Dented Cylinders Under External Pressure." Int'l Journal of Mechanical Sciences 38, No. 5, 557-578, 1996.

Corona, E., Hassan, T. and Kyriakides, S., "On the Performance of Kinematic Hardening Rules in Predicting a Class of Biaxial Ratcheting Histories." Int'l Journal of Plasticity 12, No. 1, 117-145, 1996.

c. Books/Proceedings Edited

Kyriakides, S. and Triantafyllidis, N., Guest Editors, "Material Instabilities and the Effect of Microstructure," Special Volume, International Journal of Solids and Structures, dedicated to the proceedings of an IUTAM Symposium held on May 7-11, 2001, Austin, TX (32 papers), Vol. 39:13-14, pp. 3311-3929.

De Borst, R., Kyriakides, S. and van Baten T.J., Guest Editors, "Stability and Vibration in Thin-Walled Structures." Special Volume, International Journal of Nonlinear Mechanics, Honoring Professor Johann Arbocz (28 papers), Vol. 37:4-5, pp. 571-1002, 2002.