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GROUP OF AUTOMATION, ELETRONIC AND COMPUTER SCIENCE INVESTIGATION Institución Universitaria ITM

psivt2013. MORPHOLOGICAL ANALYSIS FOR TEMPORARY BEHAVIOUR DESCRIPTION OF PHOTOELASTICITY IMAGES ON PLASTIC FILMS. M.Sc . Juan Carlos Briñez De León Ph.D. Alejandro Restrepo Martínez Ph.D . Francisco López Giraldo. GROUP OF AUTOMATION, ELETRONIC AND COMPUTER SCIENCE INVESTIGATION

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GROUP OF AUTOMATION, ELETRONIC AND COMPUTER SCIENCE INVESTIGATION Institución Universitaria ITM

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  1. psivt2013 MORPHOLOGICAL ANALYSIS FOR TEMPORARY BEHAVIOUR DESCRIPTION OF PHOTOELASTICITY IMAGES ON PLASTIC FILMS • M.Sc. Juan Carlos Briñez De León • Ph.D. Alejandro Restrepo Martínez • Ph.D. Francisco López Giraldo GROUP OF AUTOMATION, ELETRONIC AND COMPUTER SCIENCE INVESTIGATION Institución Universitaria ITM Medellín - Colombia

  2. AGENDA psivt2013

  3. Introduction psivt2013

  4. Introduction psivt2013 Photoelasticity studies

  5. Introduction psivt2013 Optical properties in thermo-deformable plastic films Color Fringes = Thicknessof samples Orderchanges

  6. Methodology - Image acquisition psivt2013 Plastic film deformation Time Shimadzu AGX 100KNewton Lengthwise deformation Elastoplastic Viscoelastic ASTM D882-10, 2010 Force

  7. Methodology - Image acquisition psivt2013 Polarizing optical assembly 30 FPS 1280x1024 pixels Maximum intensity ROI 576x150 pixels

  8. Methodology - Image acquisition psivt2013 Image Sequence 30 FPS color image THORLABS DCU224C

  9. Methodology - Image processing psivt2013 Stereology in fringes description Fringe fraction in % 1 2 3 4 . . . Images number N = number of frames temporarily extracted from the deformation video

  10. Methodology - Image processing psivt2013 Eroded surfaces in fringes description

  11. Results and Analysis Elastoplastic Viscoelastic psivt2013 Mechanical behavior of deformation

  12. Results and Analysis psivt2013 Slow changes Fast changes Stereology Graph

  13. Results and Analysis psivt2013 Derivate function of Stereology Vector Slow changes Fast changes

  14. Slow changes in size Fast changes in size • Results and Analysis psivt2013 Eroded surfaces

  15. Results and Analysis psivt2013 Graphics comparison Fast changes Elastoplastic Viscoelastic Slow changes

  16. Results and Analysis psivt2013 Correlation coefficient between mechanical and morphological behavior

  17. Conclusion psivt2013 Color fringes in image analysis show zones that could be associated with viscoelastic zones of mechanical deformation. Stereology and erosion surfaces, applied to image analysis, allows the description of mechanical behavior suffered by a plastic film when it supports a load.

  18. Acknowledgements psivt2013 psivt2013 CIMATEL

  19. psivt2013 Thank you for your time! Any questions?

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