Title: Fatigue life estimate for composite coiled tubing

Authors: Xin Zhang; Xingping Xu; Ling Gong; Hai Wang

Addresses: College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, 266580, China ' College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, 266580, China ' College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, 266580, China ' College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, 266580, China

Abstract: Based on the research methods for fatigue property and theoretical analysis for fatigue failure of coiled tubing, the decay laws of performance parameters and nonlinear damage cumulating theory of composite materials in the process of loading were introduced into fatigue life analysis of composite material coiled tubing. A fatigue life prediction model suitable for the composite material coiled tubing was established and the fatigue life time calculated. According to analysis of impact of different parameters on fatigue life of composite coiled tubing, methods of improving the fatigue life are presented. The comparative analysis of fatigue life between composite material and metal coiled tubing shows that fatigue life of composite material coiled tubing is higher.

Keywords: composite materials; composites; coiled tubing; fatigue life estimation; software programming; fatigue failure; metal tubing.

DOI: 10.1504/IJMIC.2015.071701

International Journal of Modelling, Identification and Control, 2015 Vol.24 No.1, pp.52 - 61

Received: 06 Jan 2015
Accepted: 08 Jan 2015
Published online: 15 Sep 2015 *

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