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A novel simultaneous photoelastic and two‐beam interferometric system: I. Dynamic full‐field evaluation of the elasticity modulus profile of polymeric fibres
Author(s) -
HAMZA A. A.,
SOKKAR T. Z. N.,
ELFARAHATY K. A.,
RASLAN M. I.
Publication year - 2014
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/jmi.12125
Subject(s) - elasticity (physics) , materials science , young's modulus , optics , modulus , photoelasticity , elastic modulus , anisotropy , beam (structure) , interference (communication) , interferometry , composite material , physics , computer science , telecommunications , solid mechanics , channel (broadcasting)
Summary A novel optical setup for simultaneous capturing of photoelastic and two‐beam interference patterns was designed. The designed optical setup was used to simultaneously record two types of patterns. The first pattern is two‐beam interference pattern, and the second one is photoelastic interference pattern produced by objects under stress. This simultaneous capturing of the two patterns allowed us to calculate the full‐field distribution of the elasticity modulus profile of fibres. A mathematical expression of the profile of the elasticity modulus was derived. This was applied to evaluate the elasticity modulus of anisotropic isotactic polypropylene fibres during stretching processes. The profile of the elasticity modulus was determined for both static and dynamic in situ cases where the propagation of different structural deformations was observed and studied using the designed optical setup. Patterns were given for illustration.