首页|(105834)Experimental investigations of the critical values of J-integral and crack tip opening displacement (CTOD) of high-density poly-ethylene PE100 elbow
(105834)Experimental investigations of the critical values of J-integral and crack tip opening displacement (CTOD) of high-density poly-ethylene PE100 elbow
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NSTL
Elsevier
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 J-integral J_(IC). 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 J_(IC) 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/ m~2 can be considered as the J_(IC) fracture toughness required to initiate the crack for the HDPE.
HDPE elbowJ-integralJ-R curveCTODJ_(ic)
Manel Dallali、Z. Azari、C. Schmitt
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Laboratoire de Mecanique des Fluides Appliques, Genie des Precedes et Environnement, Ecole Nationale d'Ingeniews de Sfax, BP 1173, 3038 Sfax, Tunisie
Laboratoire d'etude des Microstructures et de mecanique des mnteriaux (LEM3), Ecole Nationale dlngenieurs de Metz, University de lorraine, 57000 Metz, France
NSTL
Elsevier
