Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
J-INTEGRAL EVALUATION OF POLYTETRAFLUOROETHYLENE
Submission Author:
Douglas Gonçalves , RJ
Co-Authors:
Douglas Gonçalves, Luiz Nunes
Presenter: Douglas Gonçalves
doi://10.26678/ABCM.COBEM2019.COB2019-0487
Abstract
This article has the goal to study the fracture toughness of polytetrafluoroethylene (PTFE). During a tension test, four double ended notched specimen were evaluated in mode I stress, the load in quasi-static condition at constant temperature. Full-field displacements were attained using the Digital Image Correlation (DIC) method. A homemade program was developed to calculate the J-integral from displacement fields in three different paths of a region near the crack for each specimen. This procedure was performed to verify the path independency. Moreover, a comparison between the results obtained using J-integral and the classical strain energy release rate in the elastic region was also carried out. The agreement between both approaches is good.
Keywords
J integral, fracture toughness, PTFE, Digital Image Correlation (DIC)
