Simulation Analysis and Experimental Study on Strength Optimization of a Plug-In Oil Hose Joint

Chang Chen,Dongmei Zhang,Hao Sun,Qixin Zhang,Yongjie Niu,Jikun Guo,Shifu Zhang

doi:10.1155/2018/2395019

Chang Chen, Dongmei Zhang + Show 5 more

Open Access

https://doi.org/10.1155/2018/2395019

Copy DOI

Abstract

A plug-in oil hose joint is used as the research object in this study. Aimed at the problem of pipeline breakage due to insufficient strength of the joint during the process of oil transportation on the sea, a three-dimensional geometric model of the joint is constructed according to the structural characteristics of the plug-in joint. The mechanical properties of the plug-in hose joint were studied by numerical simulations and field experiments. The strength of the joint was optimized by applying materials with different properties and adjusting the circular angle of the joint. The tensile strength test results of the plug-in oil hose joint are consistent with the theoretical analysis, which shows that the method proposed in this paper can effectively improve the tensile strength of the oil hose joint. It is of great significance to expand the scope of the plug-in connector and ensure the safe and stable use of the hose system.

Highlights

A plug-in connector has the advantage of quick connection and is widely used in a variety of industrial and engineering activities, especially in the offshore soft oil pipeline system
By analyzing the performance di erence of the three materials, it is found that the yield strength of the material has a great in uence on the tensile strength of the joint. e main reason is that the material of the entire joint is singular
During the entire pulling process, the increased gap between the wedge part and the joint slot part and the corresponding morphological changes are the result of substantial material yield variation. erefore, the ultimate tensile strength of the joint can be signi cantly improved by choosing the material with higher yield strength without changing the geometric size of the joint

Summary

Introduction

A plug-in connector has the advantage of quick connection and is widely used in a variety of industrial and engineering activities, especially in the offshore soft oil pipeline system. Some scholars have studied the fatigue strength of welded joints. Atzori et al investigated the possibility of unifying different criteria regarding the fatigue strength of welded joints [2]. Lazzarin and Livieri summarized the fatigue strength of aluminum welded joints with different geometries and thicknesses in a single scatter band by using a notch stress intensity factor- (N-SIF-) based approach [3]. Meneghetti and Lazzarin presented an expression linking the peak stress and local strain energy value, which can be used in plane problems when mode II stress fields are nonsingular (at the weld toe) or of low intensity (at the weld root) [5]. Meneghetti extended the peak stress method (PSM) to mode II loading conditions and derived an equivalent peak stress, which is used to assess either weld toe or weld root fatigue failures [6]. Al Zamzami and Susmel investigated the accuracy and reliability of hotspot stresses, nominal stresses, effective notch stresses, notch stress

Methods

Results

Conclusion