Experimental investigations of the critical values of J-integral and crack tip opening displacement (CTOD) of high-density poly-ethylene PE100 elbow

被引：7
作者：
Dallali, Manel [1 ,2 ]
Azari, Z. [2 ]
Schmitt, C. [2 ]
Capelle, J. [2 ]
Hadj-Taieb, E. [1 ]
机构：
[1] Ecole Natl Ingn Sfax, Lab Mecan Fluides Appl Genie Proc & Environm, BP 1173, Sfax 3038, Tunisia
[2] Univ Lorraine, Lab Etud Microstruct & Mecan Mat LEM3, Ecole Natl Ingn Metz, F-57000 Metz, France
来源：
ENGINEERING FAILURE ANALYSIS | 2022年 / 131卷
关键词：
HDPE elbow; J; -integral; J -R curve; CTOD; FRACTURE-TOUGHNESS; ESSENTIAL WORK; NOTCH;
D O I：
10.1016/j.engfailanal.2021.105834
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The present study aims to characterize the cracking behaviour of high-density poly-ethylene (HDPE) pipe elbow. Experimental studies were performed to determine the mechanical behaviour of HDPE and study the anisotropy of the material. Tension tests were performed on compact tension (CT) specimens to identify the toughness value, expressed by the critical value of the Jintegral JIc. These tests were carried out on specimens cut from a PE100 plate with a different orientation angle with respect to the extrusion direction. The testing results have shown that HDPE can be considered as an isotropic material. The methods used to calculate the JIc value resulted in different value. Due to these uncertainties, a study of a failure criteria using crack tip opening displacement (CTOD) was proposed and conducted. The combination of the J-integral and "CTOD" method gave the possibility to determine for the critical value of the J-integral as a value of the fracture toughness of the HDPE. The obtained results suggest that the value of 8.4 kJ/ m2 can be considered as the JIc fracture toughness required to initiate the crack for the HDPE.
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页数：16
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