## M.Sc., Ph.D. Dimitris Sfyris

**Personal informations**

Date of birth: 17 October 1980

Place of birth: Katerini Pierias, Greece

Nationality: Greek

Native of Athens

**Contact information**

e-mail: dsfyris@env.aegean.gr

**Current position (01.04.2009-30.09.2011)**

Scientific (post-doctoral) researcher in the Institute of Continuum Mechanics

Scientific director: Prof. Dr. -Ing. Ch. Tsakmakis

**Teaching**

Summer semester 08-09: Continuum Mechanics II

Winter semester 09-10: Continuum Mechanics I (jointly with Prof. Dr. -Ing. Ch. Tsakmakis)

Summer semester 09-10: Tensor calculus

Winter semester 10-11: Plasticity theory

Summer semester 10-11: Continuum Mechanics II

### Education

1998-2002 | University of Ioannina (UOI), Department of Mathematics (B. Sc.) |

2002-2003 | National Technical Uinversity of Athens (NTUA), Department of Applied mathematics and Physics, Division of Mechanics (M. Sc.) |

16 October 2003 – 15 July 2007 |
Aristotle University of Thessaloniki (AUTh), Department of Civil Engineering, Institute of Mechanics of Materials (Ph. D.)Thesis advisorsProf. N. Charalambakis (AUTh) Prof. V.K. Kalpakides (UOI) |

**Military Training**

06 November 2007-06 November 2008 Artillery

**Previous academic exprerience**

01 October 2008-31 March 2009

Technological Educational Institute (TEI) of Kalamata

Department of Telecommunications and Computing

**Teaching**

- Mathematical Analysis I
- Mathematical Analysis II

**Participation in research projects**

01.08.2005-31.10.2005 and 1.10.2006-31.12.2006

Researcher for the needs of the program entitled: ''Constitutive equations and boundary conditions for the pseudomomentum equation'' under the framework of ''Pythagoras II' (scientific director: Prof. V. K. Kalpakides)'

**Teaching assistance**

01.11.2003-01.06.2007

Teaching assistant st the Department of Civil Engineering of AUTh for the needs of the lesson ''Strength of Materials'' (Prof. N. Charalambakis)

**Journal papers**

- D. Sfyris, N. Charalambakis, V.K. Kalpakides, „Variational arguments and Noethers theorem on the nonlinear continuum theory of dislcoations“ Int. J. Engngn. Sci. 44, 501-512 (2006).

- D. Sfyris, N. Charalambakis, V.K. Kalpakides, „Continuously dislocated elastic bodies with a neo-hookean like expression for the enrgy subjected to antiplane shear“ J. Elast. 93, 245-262 (2008).

- D. Sfyris, N. Charalambakis, V.K. Kalpakides, „Derivation of material momentum equation from balance of energy“ ZAMP 60, 575-579 (2009).

- D. Sfyris, „The strong ellipticity condition under changes of the current and the reference confihuration“ J. Elast. 103, 281-287 (2011).

- D. Sfyris, „Propagation of aplane wave to a materially uniform but inhomogeneous body“ ZAMP, in press.

- D. Sfyris, „Comparing the condition of strong ellipticity and the solvability for a purely elastic problem and the corresponding dislocated problem“ Mathematics and Mechanics of Solids, to appear.

**Conferences (with publication at the proceedings)**

- D. I. Bardzokas, G.I. Sfyris, D. Sfyris, „Antiplane mixed boundary value problem of electroelastic media, for a piezoelectric medium with defects in the form of holes“. The Fifth national Conference of the Hellenic Society of non-Destructive Testing, Athens, NTUA, November 18-19, 2005, pp. 90-112. (Presentation given by Prof. D.I. Bardzokas.)

- D. Sfyris, N. Charaöambakis, V.K. Kalpakides, „On the force acting on dislocations within nonlinear elastostatics“. The Second International Conference on non-Smooth\non-Convex Mechanics with applications in Engineering, Thessaloniki, AUTh, July 7-8, 2006, pp. 29-36. (Presentation given by D. Sfyris.)

- D. Sfyris, N. Charalambakis, V.K. Kalpakides, „Continuously dislocated elastic bodies subjected to antiplane shear“. The 8th HSTAM International Congress on Mechanics, Patras, July 12-14, 2007, pp. 308-316. (Presentation given by D. Sfyris.)

- D. Sfyris, „On strong ellipticity and solvability of continuously dislocated bodies“. The 9th HSTAM International Congress in Mechanics, Cyprus, July 12-14, 2010, pp. 121-128. (Presentation given by D. Sfyris.)

- C. Broese, D. Sfyris, Ch. Tsakmakis, „Effect of the choice of plastic intermediate configuration on anisotropic and gradient plasticity“. The 9th International Congress in Mechanics, Cyprus, July 12-14, 2010, pp. 145-152. (Presentation given by Dr. C. Broese).

**Conferences (without publications at the proceedings)**

- V.K. Kalpakides, D. Sfyris, N. Charalambakis, „Some variational arguments on the nonlinear continuum theory of dislocations“. The First International Conference on Computational Mechanics, Belgrade, November 15-17, 2004. (Presentation given by Prof. V.K. Kalpakides.)

- D. Sfyris, N. Charalambakis, V.K. Kalpakides, „On the force acting on dislocations within nonlinear elastostatics“. the 11th Greek Conference on Analysis, Thessaloniki, AUTh, may 23-24, 2006. (Presentation given by D. Sfyris.)

- D. Sfyris, „An approach to the theory of continuously dislocated bodies by means of configurational mechanics“. The First International Conference on Material Modelling, Dortmund, Germany, September 15-17, 2009.

### Talks-Seminars

02.06.2009 | D. Sfyris, „Continuously dislocated elastic bodies subjected to antiplane shear“. At the opoen seminar held at the Department of Mathematics, Technical University of Darmstadt (coordinator: Prof. Dr. H.-D. Alber). |

11.11.2009 | D. Sfyris, „Remarks concerning ellipticity for finite elastic deformations of materially uniform but inhomogeneous bodies“. At the open seminar held at the Department of Mathematics, Technical University of Darmstadt (coordinator: prof. Dr. H. -D. Alber). |