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Dr. Stan Pietruszczak
B.Eng., M.Sc. (Warsaw),
Ph.D. (Polish Academy of Science)

Office JHE 228
Extension 24007
Email address

Professor, Civil Engineering

Geotechnical Engineering

Research Interests

  • Geotechnical Engineering
  • Structural Mechanics
  • Biomechanics

Specific Research Interests and Activities:

Modelling of mechanical response of geomaterials (soils, rocks, etc.) to both monotonic and fluctuating loads. Description of inherent and induced anisotropy through incorporation of some tensorial functions reflecting the evolution of material microstructure. Modelling of the chemo-mechanical interaction in rocks / soils. Description of strain localization phenomenon, in dry and saturated soils, through a homogenization technique.

Structural Mechanics
Modelling of mechanical properties of masonry and reinforced concrete. Numerical analysis of concrete structures, including nuclear containment structures. Assessment of seismic stability of masonry structures. Modelling of the mechanical effects of alkali-aggregate reaction in hydraulic structures. Description of the response of saturated cemented aggregate mixtures, including localized deformation.

Description of aging and functional adaptation of bone. Evaluation of risk of fracture of bones; modelling of bone-implant interaction.


  • North American Editor of Intern. Journ. 'Computers and Geotechnics', Elsevier Science Ltd. (1989-2010)
  • Books authored

  • Pietruszczak S., Fundamental of Plasticity in Geomechanics, Taylor & Francis Group, Leiden/London/New York, Sept. 2010, 206 pages.
  • Samples of Journal papers

  • Azami A., Pietruszczak S., Guo P., Bearing capacity of shallow foundations in transversely isotropic granular media, Intern. Journ. Num. Anal. Meth. Geomech. Vol. 34, No. 8, 2010, pp.771-793.
  • Haghighat E. & Pietruszczak S., On modeling of discrete propagation of localized damage in cohesive-frictional materials, Intern. Journ. Num. Anal. Meth. Geomech. (accepted)

  • Pietruszczak S. & Haghighat E., Modeling of fracture propagation in concrete  structures using a constitutive relation with embedded discontinuity, Studia Geotechnica et Mechanica, 2014, vol.36, No.4, pp.27-33

  • Pietruszczak S., Haghighat E., Modeling of delayed failure of embankments due to water infiltration, ACEE Journ. 2014, vol.7, No.4, pp.67-76

  • Haghighat E., Pietruszczak S., Discrete modeling of cohesive crack  propagation via an enhanced continuum approach, Int. Journal of Numerical Methods in Engineering (under review)

  • Oboudi M. & Pietruszczak S., On the load induced evolution of fabric of geomaterials, Journ. Mech. & Physics of Solids (under review)

  • Pietruszczak S., Haghighat E., Modeling of deformation and localized failure in anisotropic rocks, Intern. Journ. Solids & Structures (under review)

  • Oboudi M., Pietruszczak S. & Razaqpur G., Description of inherent and induced anisotropy in granular media with high sphericity particles, Int. Journ. Plasticity  (under review)

  • Pietruszczak S., Gdela K., Inelastic analysis of fracture propagation in distal radius, Journ. Applied Mechanics, Vol. 77, No.1., 2010, pp. 011009-1-10.
  • Shieh-Beygi B., Pietruszczak S., Numerical analysis of masonry structures: mesoscale approach, Computers and Structures, Vol. 86, 2008, pp.1958-1973.
  • Winnicki A., Pietruszczak S., On mechanical degradation of reinforced concrete affected by alkali-aggregate reaction, Journ. Eng. Mech., ASCE., Vol. 134, No. 8, 2008, pp. 611-628.
  • Pietruszczak S., Gdela K., Webber C and Inglis D., On the assessment of brittle- elastic cortical bone fracture in distal radius, Journ. Engineering Fracture Mech., Vol. 74, 2007, pp. 1917-1927.
  • Pietruszczak S., Lydzba D. and Shao J.F., Modelling of deformation response and chemo-mechanical coupling in chalk, Int. Journ. Num. Anal. Meth. Geomech. Vol. 30, 2006, No.10, pp. 997-1018.
  • Total of over 140 refereed papers.