Peter Olsson

Peter Olsson
Dynamik
peter dot olsson at chalmers dot se
+46 31 772 37 25

Peter Olsson, professor of Mechanics has previously among other things been vice president of Chalmers University of Technology, with responsibility for all education at the BSc and MSc levels. Aftter a decade of administration and academic leadership he has now, with a sigh of relief, returned to research and teaching.

Peter's research has been focused around direct and inverse problems for mechanical waves in solids and structures, and around analytic and numeric models with applications in e.g. seismic wave propagation and in non-destructive evaluation with ultrasound.

His present research interests revolve around how one, by a judicious choice of material parameters, can re-route elastodynamic waves. It would, for example, sometimes be desirable to be able to steer ground waves around sensitive infrastructure rather than letting the waves hit the structure.

The methods Peter is developing are inspired by the so called transformation optics approach to cloaking, an approach that has in other contexts like electromagnetics, given recipes for the design of metamaterials for "invisibility cloaks." However, the mechanical applications, on which Peter is working, do not concern "invisibility," but deal with how to protect structures or parts of a structure from potentially harmful transient waves (or time harmonic vibrations) by re-routing the oscillations.

Another part of his present research interests revolve around novel methods for medical diagnostics using elastodynamic vibrations. These methods, which in some cases are promising to be superior to ultrasonic detection, include Magnetic Resonance Elastography, MRE, and Elastic Surface Impedance Tomography.

Publikationer 2011

Olsson, Peter: Non-uniqueness of time-domain reflection from 3D planar elastic layers. Wave motion, 48 (6) pp. 539-549 .

Olsson, Peter; Wall, D. J. N.: Partial elastodynamic cloaking by means of fiber-reinforced composites. Inverse Problems, 27 (4)

Wall, David J.N.; Olsson, Peter; van Houten, Elijah E. W.: On an inverse problem from magnetic resonance elastic imaging. SIAM Journal on Applied Mathematics, 71 (5) pp. 1578-1605.

2006

Enelund, Mikael; Olsson, Peter: Time domain formulation of the Biot poroelastic theory using fractional calculus. Second IFAC Workshop on Fractional Differentiation and its Applications, pp. 416-421. ISBN/ISSN: ISBN 972-8688-42-3

Johansson, Martin; Folkow, Peter D.; Olsson, Peter: Dispersion free wave splittings for structural elements. Computers & Structures, 84 pp. 514-27.

2005

Adolfsson, Klas; Enelund, Mikael; Olsson, Peter: On the fractional order model of viscoelasticity. Mechanics of Time-Dependent Materials, 9 pp. 15-34.

Johansson, Martin; Folkow, Peter D.; Hägglund, Anders H.; Olsson, Peter: Approximate boundary conditions for a fluid-loaded elastic plate. Journal of the Acoustical Society of America, 118 (6) pp. 3436 - 3446.

2001

Boström, Anders; Johansson, Gunnar; Olsson, Peter: On the rational derivation of a hierarchy of dynamic equations for a homogeneous, isotropic, elastic plate. International Journal of Solids and Structures, 38 pp. 2487-2501.

1999

Enelund, Mikael; Olsson, Peter: Damping described by fading memory - Analysis and application to fractional derivative models. International Journal of Solids and Structures, 36 pp. 939-970.

1998

Folkow, Peter D.; Kristensson, Gerhard; Olsson, Peter: Time domain Green functions for the homogeneous Timoshenko beam. Quarterly Journal of Mechanics and Applied Mathematics, 51 pp. 125-141.

1997

Enelund, Mikael; Fenander, Åsa; Olsson, Peter: Fractional integral formulation of constitutive equations of viscoelasticity. AIAA Journal, 35 pp. 1356-1362.

Wall, David J.N.; Olsson, Peter: Invariant imbedding and hyperbolic heat waves. Journal of Mathematical Physics, 38 pp. 1723-1749.

1995

Enelund, Mikael; Olsson, Peter: Damping described by fading memory models. Proceedings of the 36th Structures, Structural Dynamics, and Materials Conference, New Orleans, LA, USA,

1994

Boström, Anders; Jansson, Per-Åke; Olsson, Peter: Antiplane elastic wave scattering from a curved randomly rough crack. Journal of Applied Mechanics, 61 pp. 835-842.

Olsson, Peter; Kristensson, Gerhard: Wave splitting for the Timoshenko beam equation in the time domain. Zeitschrift für Angewandte Mathematik und Physik, 45 pp. 866-881.

1992

Boström, Anders; Bövik, Peter; Olsson, Peter: A Comparision of Exact First Order and Spring Boundary Conditions for Scattering by Thin Layers. Journal. of Nondestr. Eval., 11 pp. 175-184.

Boström, Anders; Bövik, Peter; Olsson, Peter: A Comparison of Exact First Order and Spring Boundary Conditions for Scattering by Thin Layers. Journal of Nondestructive Evaluation, 11 pp. 175-184.

Boström, Anders; Olsson, Peter; Datta, Subhendu K.: Effective plane wave propagation through a medium with spheroidal inclusions surrounded by thin interface layers. Mechanics of Materials, 14 pp. 59-66.

Bövik, Peter; Olsson, Peter: Effective Boundary Conditions for the Scattering of Two-dimensional SH Waves from a Curved Thin Elastic Layer. Proc. Royal Soc. of Lond. A, 439 pp. 257-269.

Bövik, Peter; Olsson, Peter: Effective boundary conditions for scattering of 2D SH waves from a curved thin elastic layer. Proceedings of the Royal Society of London, A 439 pp. 257-269.

1991

Bövik, Peter; Olsson, Peter: Diffraction of Horizontally Polarised Shear Waves by a Crack Extending from a Thin Anisptropic Layer. Göteborg : Chalmers University of Technology.

Bövik, Peter; Olsson, Peter: Scattering of 2D SH Waves from a Thin Semi.infinite Elastic Layer Ending in a Micro-crack. Göteborg : Chalmers University of Technology.

Olsson, Peter; Boström, Anders: The null field and T matrix methods for elastodynamic scattering problems: cracks and other types of flaws. Elastic Waves and Ultrasonic Nondestructive Evaluation: Proceedings of the IUTAM Symposium on Elastic Wave Propagation and Ultrasonic Evaluation,

Olsson, Peter; Wilde, Peter: The null field approach to boundary value problems for the Stokes equation. Quarterly Journal of Mechanics and Applied Mathematics, 44 pp. 69-90.

Persson, Gert; Olsson, Peter: 2-D elastodynamic scattering from a semi-infinite cracklike flaw with interfacial forces. Wave Motion, 13 pp. 21-41.

1990

Datta, Subhendu K; Shah, A.H.; Karunasena, Warna Karu; Olsson, Peter; Boström, Anders: Wave propagation in the presence of interface layers in composites. Materials Science and Engineering, A 126 pp. 141-147.

Olsson, Peter: Elastic wave propagation in the presence of cracks and thin interphase layers. Journal of Technical Physics, 31 pp. 393-400.

Olsson, Peter; Datta, Subhendu K; Boström, Anders: Elastodynamic scattering from inclusions surrounded by thin interface layers. Journal of Applied Mechanics, 57 pp. 672-676.

Olsson, Peter: Elastodynamic scattering from pennyshaped and nonplanar cracklike flaws with dissipation and restoring forces. Journal of Applied Mechanics, 57 pp. 661-666.

1989

Boström, Anders; Olsson, Peter: Dynamic stress intensity factors for 3D non-planar cracks. Applied Mathematics and Mechanics 35; Proceedings of the Second I.U.T.A.M.-I.U.P.A.P. Symposium on Elastic Wave Propagation,

Boström, Anders; Datta, Subhendu K.; Olsson, Peter: Ground motion amplification on alluvial valleys. Applied Mathematics and Mechanics 35; Proceedings of the Second I.U.T.A.M.-I.U.P.A.P. Symposium on Elastic Wave Propagation,

Boström, Anders; Datta, Subhendu K.; Olsson, Peter: Scattering of elastic waves by inclusions surrounded by thin interface layers. Applied Mathematics and Mechanics 35; Proceedings of the Second I.U.T.A.M.-I.U.P.A.P. Symposium on Elastic Wave Propagation,

Olsson, Peter; Stigh, Ulf: On the determination of the constitutive properties of thin interphase layers – an exact inverse solution. International Journal of Fracture, 41 pp. R71-R76.

1988

Boström, Anders; Datta, Subhendu K.; Olsson, Peter: Elastodynamic scattering from inclusions with thin interface layers. Wave Propagation in Structural Composites AMD Vol. 90; Proceedings of the Joint ASME/SES Applied Mechanics and Engineering Sciences Conference, June 20-22, 1988, pp. 109-116.

1987

Boström, Anders; Olsson, Peter: Scattering of elastic waves by non-planar cracks. Wave Motion, 9 pp. 61-76.

Olsson, Peter: Elastodynamic wave scattering by an incompressible elastic inclusion. Applied Scientific Research, 44 pp. 313-332.

1986

Olsson, Peter: Elastodynamic scattering by fluid-filled nonplanar cracks. Journal of Nondestructive Evalution, 5 pp. 161-168.

Olsson, Peter: Scattering of elastic waves by a smooth rigid movable inclusion. Journal of the Acoustical Society of America, 79 pp. 1237-1247.

Olsson, Peter: The acoustic limit in the null field approach to elastodynamic scattering. Journal of the Acoustical Society of America, 80 pp. 317-324.

1985

Olsson, Peter: Acoustic scattering by a rigid movable body immersed in a fluid. Journal of the Acoustical Society of America, 78 pp. 2132-2138.

Olsson, Peter: Elastostatic stress fields from pressurized cavities. Applied Scientific Research, 42 pp. 131-159.

Olsson, Peter: The rigid movable Inclusion in elastostatics and elastodynamics. Wave Motion, 7 pp. 421-445.

1984

Olsson, Peter: Elastostatics as a limit of elastodynamics – a matrix formulation. Applied Scientific Research, 41 pp. 125-151.

1981

Boström, Anders; Olsson, Peter: Transmission and reflection of electromagnetic waves by an obstacle inside a waveguide. Journal of Applied Physics, 52 pp. 1187-1196.

Tillämpad mekanik

Peter Olsson