Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
An experimental study on the structural behavior of a flexible pipe under axial compressive loads using digital image correlation
Submission Author:
Rodrigo Mota Amarante , SP
Co-Authors:
CELSO Pupo Pesce, Roberto Ramos Jr., Rafael Santiago, Jose Renato Mendes de Sousa, Marcos Alves Rabelo, Rodrigo Mota Amarante
Presenter: Rodrigo Mota Amarante
doi://10.26678/ABCM.COBEM2017.COB17-2875
Abstract
Due to compressive loads, flexible pipes may exhibit global and local structural instabilities and, consequently, structural failures. This work presents an experimental investigation concerning the local structural behavior of a 2.5-inch flexible pipe sample under compressive load. Instabilities of two types, elephant’s foot buckling at the connector and radial (birdcaging) instability at mid sections, have been observed. Digital image correlation techniques, applied for the first time in this scenario, allowed a clear experimental assessment. Correspondence between axial compressive loads and observed instabilities are discussed. Further studies on triggering mechanisms for these two types of instabilities, aiming at proposing analytical stability criteria, are left to a further paper.
Keywords
Birdcaging, radial buckling, structural instability, elephant's foot buckling, flexible pipe, Digital Image Correlation (DIC), compressive loads, experimental analysis
