Peter Mackenzie
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(full name: Peter Mackenzie-Helnwein) Research Assistant Professor University of Washington Seattle, WA 98195-2700 ph 206-685-2611 fx 206-543-1543 pmackenz@u.washington.edu old homepage at Vienna University of Technology |
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Peter Mackenzie-Helnwein joined the faculty at the University of Washington in 2003. Prior to this appointment he held a position as University Assistant with the Department of Civil Engineering at the Vienna University of Technology, Austria (1991-2002, since 1997 in the US equivalent rank of Assistant Professor).
Peter Mackenzie-Helnwein received his Diplom-Ingenieur (Master of Science) in Civil Engineering from the Vienna University of Technology, Vienna, Austria, in 1991. He received his Doctoral Degree (Dr. techn.) sub auspiciis preasident rei publicae, the highest academic honor of Austria, in 1997. Since 2003, he holds the venia docendi from the Vienna University of Technology.
He received the Appreciation Award of the Austrian Minister for Science and Transportation in 1996, and a 3 years APART stipend from the Austrian Academy of Sciences for 1999-2001.
EDUCATION
venia docendi for strength of materials and structural analysis at the Vienna University of Technology, Austria, 2003
Dr. techn. (Ph.D.) in Civil Engineering, Vienna University of Technology, Austria, 1997, sub auspiciis preasidentis rei publicae
Dipl.-Ing. (MS) in Civil Engineering, Vienna University of Technology, Austria, 1991, Graduated with highest honors
RESEARCH INTERESTS
Beam, Plate, and Shell Structures
Structural Stability
Constitutive Modeling of Anisotropic Materials
Finite Element Technology
Contact Analysis (FEM)
CLASSES TAUGHT
CEE 220 Introduction to Mechanics of Materials
CEE 599 Special topics: Nonlinear Finite Element Analysis
CEE 600 Independent Studies (Contact Mechanics)
Strength of Materials (Undergrad. level) in Austria
Theory of Plates and Shells (Undergrad./Grad. level), in Austria
Finite Element Analysis (Undergrad./Grad. level), in Austria
Numerical Analysis of Shells (Grad. level), in Austria
Continuum Mechanics Background (Grad. level), in Austria
Rubber-like Materials (Grad. level summer school), in Slovak Republic
PUBLICATIONS
Journal Publications
P. Mackenzie-Helnwein, J. Eberhardsteiner, H.A. Mang, A Multi-Surface Plasticity Model for Clear Wood and its Application to the Finite Element Analysis of Structural Details, Computational Mechanics, 31, 1-2, 204-218 (2003).
P. Mackenzie-Helnwein, A. Hanhijärvi, Computational analysis of quality reduction during drying of lumber due to irrecoverable deformation - Part II: Algorithmic aspects and practical application, ASCE Journal of Engineering Mechanics, 129, 9, 1006-1016 (2003).
A. Hanhijärvi, P. Mackenzie-Helnwein, Computational analysis of quality reduction during drying of lumber due to irrecoverable deformation - Part I: Orthotropic viscoelastic-mechanosorptive-plastic material model for the transverse plane of wood, ASCE Journal of Engineering Mechanics, 129, 9, 996-1005 (2003).
J. Eberhardsteiner, G. Hofstetter, G. Meschke, P. Helnwein, Coupled Material Modelling and Multifield Structural Analyses in Civil Engineering, Engineering Computations, 20, 5/6, 524-558 (2003) (Also available as on-line publication at CIMNE - International Center for Numerical Methods, FEM Class 42, May 29--31, Organizers: G. Peric, E. Onate).
P. Helnwein, J. Eberhardsteiner, H.A. Mang, Short-term Mechanical Behavior of Biaxially Stressed Wood: Experimental Observations and Constitutive Modeling as an Orthotropic Two-Surface Elasto-Plastic Material, Wood Science and Technology (2003) submitted for publication.
P. Helnwein, J. Eberhardsteiner, A. Hanhijärvi, Constitutive Model for the Short-Term Failure Analysis of Wood Under Multiaxial States of Stress: Effect of Radial Compression, Proceedings of the First International Conference of the European Society for Wood Mechanics, P. Navi, European Society for Wood Mechanics, Swiss Federal Institute of Technology (EPFL), 285-294, Reprographie EPFL, Lausanne, Switzerland, April 19-21, 2001 (2002).
P. Helnwein, Some Remarks on the Compressed Matrix Representation of Symmetric Second-Order and Fourth-Order Tensors, Computer Methods in Applied Mechanics and Engineering, 190, 22-23, 2753-2770 (2001).
P. Helnwein, H.A. Mang, B. Pichler, Ab initio estimates of stability limits on nonlinear load-displacement paths: potential and limitations, Computer Assisted Mechanics and Engineering Sciences, 6, 3/4, p. 345-360 (1999).
P. Helnwein, H.A. Mang, "Der Blick über den Zaun`"- Lineare Stabilitätsuntersuchungen als Träger von Informationen über nichtlineares Strukturverhalten im Vorbeulbereich, Der Bauingenieur, 73, 5, 247 - 256 (1998), in German.
P. Helnwein, H.A. Mang, An asymptotic approach for the evaluation of errors resulting from estimations of stability limits in nonlinear elasticity, Acta Mechanica, 125, 235 - 254 (1997).
H.A. Mang, P. Helnwein, R.H. Gallagher, On the Nonuniqueness of Solutions Obtained with Simplified Variational Principles, Journal of Applied Mechanics, 63, 820 - 827 (1996).
C.H. Liu, G. Meschke, P. Helnwein, H.A. Mang, Tying Algorithm for Linking of Finite Element Meshes with Different Degrees of Refinement. Application to Finite Element Analyses of Tires, Computer Assisted Mechanics and Engineering Sciences, 2, 289 - 305 (1995).
G. Meschke, P. Helnwein, Large-strain 3D-analysis of fibre-reinforced composites using rebar elements: hyperelastic formulations for cords, Computational Mechanics, 13, 241 - 254 (1994).
P. Helnwein, C.H. Liu, G. Meschke, H.A. Mang, A new 3D Finite Element Model for Cord-Reinforced Rubber Composites - Applications to analysis of Automobile Tires, Finite Elements in Analyses and Design, 14, 1 -16 (1993).
Books
Peter Helnwein, Zur initialen Abschätzbarkeit von Stabilitätsgrenzen auf nichtlinearen Last-Verschiebungspfaden elastischer Strukturen mittels der Methode der Finiten Elemente , Institute for Strength of Materials, Vienna University of Technology, Vienna, Austria (1996) Dissertationen der Technischen Universität Wien, Band 79, Österreichischer Kunst- und Kulturverlag (1998), in German.