Calculation of defects in pressurised cylindrical shells instrumented by acoustic emission and strain gauges

¹ Sorbonne, Université de Technologie de Compiègne, CNRS-UMR 7337, Roberval UMR, Centre de recherche Royalieu, CS 60319, 60203 Compiègne, France
laksimi@utc.fr
² Département Technologie des Polymères et Composites and Ingénierie Mécanique, École des Mines de Douai 941, rue Charles Bourseul, B.P. 10838, 59508 Douai Cedex, France
³ Équipe de Mécanique Matériaux et Systèmes (EMMS), département de physique Faculté des Sciences et Techniques Errachidia, Université My Ismaïl, BP 509 Boutalamine, 52000 Errachidia, Maroc
⁴ LaBPS (Laboratoire de mécanique, Biomécanique, Polymères, Structures), École Nationale d’Ingénieurs de Metz, Université Paul Verlaine-Metz, Ile du Saulcy, 57045 Metz, France

Received: 7 July 2015
Accepted: 23 October 2015

Abstract

This research based on fracture mechanic, associated with numerical computation by finite element method, aims to characterize and to better understand the harmfulness of an existing defect in a structure under pressure. Thus mini-structures have been manufactured, which have defects with different locations and orientations. Instrumentation by strain gauges around the defects was carried out. A grid by sensors of acoustic emission was also used to detect any irreversible deformation in the material (plastic deformation, initiation and evolution of defect). A correlation between numerical calculation and the experimental results is shown.