Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
BLISTER TEST AS AN ALTERNATIVE TO HYDROSTATIC TEST IN COMPOSITE REPAIR QUALIFICATION
Submission Author:
Julia Figueiredo Sathler , RJ , Brazil
Co-Authors:
Julia Figueiredo Sathler, João Marciano Laredo dos Reis, Heraldo da Costa Mattos
Presenter: Julia Figueiredo Sathler
doi://10.26678/ABCM.COBEM2019.COB2019-0641
Abstract
The qualification of composite repairs systems for pipelines with through-thickness defects usually requires a number of hydrostatic tests to obtain the failure pressure. The estimation of the failure pressure is usually performed in the oil industry using linear fracture mechanics analysis in both ISO and ASME standards and both standards require the determination of a constant fracture energy, also called energy release rate. In the case of monotonically increasing loading histories, in the framework of linear fracture mechanics, interfacial debonding occurs brutally when the fracture energy reaches a critical value. This study is an attempt to show that simpler blister tests can be used as replacement for hydrostatic tests in the qualification of such repair systems. The idea is to obtain experimentally the critical fracture energy using blister tests.
Keywords
blister test, energy release rate, composite repair, fracture energy, hydrostatic test
