SVIBOR - Project code: 2-08-172

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 2-08-172


STRESSES IN THE FIELDS OF HIGH GRADIENTS OF STRAINS


Main researcher: JECIĆ, STJEPAN (18241)


Assistants
Type of research: basic
Duration from: 01/01/91. to 01/01/94.
Papers on project (total): 55
Papers on project quoted in Current Contents: 6
Institution name: Fakultet strojarsva i brodogradnje, Zagreb (120)
Department/Institute: Institut of Mechanical Structures Department of Engeneering Mechanics
Address: Ivana Lučića 5
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 6111-944
Fax: 385 (0)1 514-535
E-mail: Stjepan.Jecic@public.srce.hr
E-mail: Damir.Semenski@public.srce.hr
E-mail: Mladen.Gomercic@public.srce.hr
Summary: The project comprises: 1. The analysis of stresses in the fields of high gradients of deformations caused by geometrical discontinuities because of curvature of contours or at the vicinity of cracks and cuts. 2. Experimental and numerical determination of stress intensity factors and stress concentration. 3. Complement of caustic method and modification of the stereophotogrametry and stress pattern analysis by thermal emission for analyzing sresses in high gradients of strains. 4. Investigation of influence of plastification on stress intensity factor decreasing. 5. Development of adaptable and commonly used procedures for image processing system.

Keywords: mechanics of deformable bodies, stress concentration, stress intensity factors, experimental mechanics, optical methods, caustics, SPATE, stereophotogrammetry, image processing, fracture mechanics, cracks

Research goals: 1. Corrections of the known solutions for the stress concentration factors in the field of high gradients for the basic geometrical discontinities for two and three dimensional problems. 2. By using these results and linear characteristics of the stress intensity factors is planed to be done for the discontinuity with the singular value (the change of geometry without curvation). 3. The modification of experimental method of caustic and designing of a universal method for investigation of cracks in mechanicalaly isotropic and anisotropic material. 4. To investigate posibilities of application of other optical methods (SPATE, stereophotogrammetry) for the high stress concentration in cases where the caustic method is not reliablein use. 5. Development of the flexibile system for automatic image processing system that comprises the image digitalizacionand processing the stresses, deformations, displacements andevaluating stress concentration and stress intensity factor (equipement, programs).

COOPERATION - PROJECTS


  1. Name of project: P09302-TEC Fixierung dreidimensionaler Deformationszustaende in Polymeren mittels ionisierender Strahlung fuer spannungsoptische Untersuchungen
    Name of institution: Technische Universitaet Wien-Institut fuer Festigkeitslehre, Forschungszentrum Seibersdorf, Technical University Budapest
    City: Beč,Seibersdorf,Budapest, Austrija,Mađarska

COOPERATION - INSTITUTIONS


  1. Name of institution: Technische Universitaet Braunschweig
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of experts
    City: D-38106 - Braunschweig, Njemačka

  2. Name of institution: Technische Universitaet Wien
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of experts
    City: Beč, Austrija

  3. Name of institution: Fachhochschule Nuernberg
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of experts
    City: Nuernberg, Njemačka

  4. Name of institution: Technische Universitaet Muenchen
    Type of institution: University/Faculty
    Type of cooperation: Occasional exchange of experts
    City: Muenchen, Njemačka
Other information about the project.
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Last update: 10/11/95
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