Experimental and numerical analysis of the fields of the frozen stresses in an epoxy sphere using the stress-freezing method and mechanical slicing

Touahir, Kamel, Bilek, Ali, Bocher, Philippe et Beldi, Mustapha. 2019. « Experimental and numerical analysis of the fields of the frozen stresses in an epoxy sphere using the stress-freezing method and mechanical slicing ». Journal of Materials and Engineering Structures, vol. 6, nº 2.

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Résumé

The stresses induced by a mechanical contact imposed on a birefringent sphere have been studied experimentally and numerically. The birefringent sphere is machined from a birefringent parallelepiped on a high speed numerically controlled machine. The residual stresses developed in the birefringent sphere have been eliminated by a heat treatment relaxation. The technique of freezing and mechanical cutting in thin slices was used. In the case of 3D photoelasticity, the frozen stress techniques, which are very much used, may introduce residual stresses in the cut up slices. Although the means to avoid the introduction of these residual stresses are well established, these techniques remain time consuming. Slices are analyzed on a polariscope using plane polarized light and circular polarized light. The photoelastic fringes are used to determine the principal directions of the stresses as well as the values of the stresses. A numerical simulation using the finite elements made it possible to make a comparison with the experimental results. The analysis shows a good correlation between experimental measurements and numerical simulation.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Bocher, Philippe
Affiliation:	Génie mécanique
Date de dépôt:	02 mai 2019 17:55
Dernière modification:	06 août 2019 15:02
URI:	https://espace2.etsmtl.ca/id/eprint/18719

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