Six image phase stepped photoelasticity for the quantification of the stress field around 25 μm reinforcing fibres

Z. Liu (1) , F.M. Zhao (2) , F.R. Jones (1)

1 Department of Engineering Materials
2 International Paint Ltd.

A six image phase stepped photoelastic technique has been applied for the measurement of the interfacial shear stress distribution in the matrix resin along a reinforcing E-glass fibre of ∼ 25 μm at its end and at a fibre-break. Contour maps of the isochromatic fringe order and its corresponding isoclinic angle, which are related to the principal stress difference and direction relative to the fibre axis, could be obtained continuously using this photoelastic technique. Thus the actual interfacial shear stress along the fibre can be calculated. Furthermore in the presence of a fibre-break, interfacial debonding and matrix yielding during stress transfer was investigated.

Mots clés: B. Debonding; B. Fracture; B. Interfacial strength; C. Stress transfer; Photoelasticity

Domaines: Matériaux

Z. Liu, F.M. Zhao, F.R. Jones. Six image phase stepped photoelasticity for the quantification of the stress field around 25 μm reinforcing fibres. Composites Science and Technology, 2010, 70 (14), pp.2039. ⟨10.1016/j.compscitech.2010.07.011⟩. ⟨hal-00682263⟩