Research on Hydraulic Self-Enhancement Technology of Fracturing Pump’s Valve Box

2012 ◽  
Vol 479-481 ◽  
pp. 2076-2081
Author(s):  
Fa Guang Jiang ◽  
Zheng Liang ◽  
Guang Hui Zhao ◽  
Pan Wang ◽  
Liang Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Material Property ◽  
Fatigue Cracks ◽  
Treatment Method ◽  
Oil Field ◽  
Structural Size ◽  
Enhancement Technology ◽  
Horse Power

It is very important to process acid and fracturing treatment in oil field to improve permeability. The fracturing pump is one of the key equipment for Acid and fracturing treatment. The valve box of fracturing pump is fundamental, costly and wearing parts. Based on the data from domestic and abroad, the life of the valve box is short. Fatigue cracks caused by alternating stress and erosion account for the most invalidation of the valve box. Only increasing structural size and improving material property are not efficient to prolong service life. Related studies show that hydraulic self-enhancement technology is an effective method and it is used widely to improve service life of fracturing pump’s hydraulic parts. Here hydraulic self-enhancement process was simulated by finite element method and 600 Horse Power fracturing pump was studied. The optimal self-enhancement pressure and loading-unloading treatment method are suggested. This study offers a method to found valve box's production technics by hydraulic self-enhancement technology.

scholarly journals Field Investigation and Rapid Deterioration Analysis of Heavy Haul Corrugation

2021 ◽  
Vol 11 (14) ◽  
pp. 6317
Author(s):  
Feng Jin ◽  
Hong Xiao ◽  
Mahantesh M Nadakatti ◽  
Huiting Yue ◽  
Wanting Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Cracks ◽  
Field Measurements ◽  
Field Investigation ◽  
The Finite Element Method ◽  
Rail Corrugation ◽  
Rapid Deterioration ◽  
Heavy Haul

In this study, the rapid growth of corrugation caused by the bad quality of grinding works and their wavelength, depth, and evolution processes are captured through field measurements. The residual grinding marks left by poor grinding quality lead to further crack accumulation and corrugation deterioration by decreasing plastic resistance in rails. In this case, the average peak-to-peak values of corrugation grow extremely fast, reaching 1.4 μm per day. The finite element method (FEM) and fracture mechanics methodologies were used to analyze the development and trends in rail surface crack deterioration by considering rails with and without grinding marks. Crack propagation trends increase with residual grinding marks, and they are more severe in circular curve lines. To avoid the rapid deterioration of rail corrugation, intersections between grinding marks and fatigue cracks should be avoided.

Kinematics and Dynamics of a Multibody System of an Oilfield Pumping Unit by Means of Finite Element Method

1997 ◽  
Author(s):  
Si-zhu Zhou ◽  
Jacob Jen-Gwo Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Multibody System ◽  
Elastic System ◽  
Global Analysis ◽  
Oil Field ◽  
Kinematics And Dynamics ◽  
The Matrix ◽  
Pumping Unit ◽  
Element Method

Taking a multibody system of the oil field pumping unit into a multibody elastic system, this paper analyzes its kinematics and dynamics by means of finite element method, deduces the kinematics and dynamics function after doing the element’s and global analysis, and puts forward the procedures of this method, i.e., (1) dividing the system into elements; (2) calculating for the elements; (3) calculating the matrix of external force; (4) piling the element stiffness and mass matrixes up; and (5) solving the function. As an example, this paper illustrates the process of analyzing the multibody system of a PUMPING UNIT used in an oil field.

Geometric and Material Property Study of the Human Lumbar Spine Using the Finite Element Method

1992 ◽  
Vol 5 (4) ◽  
pp. 50-59 ◽  
Author(s):  
W. Suwito ◽  
T. S. Keller ◽  
P. K. Basu ◽  
A. M. Weisberger ◽  
A. M. Strauss ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Lumbar Spine ◽  
Material Property ◽  
The Finite Element Method ◽  
Human Lumbar Spine ◽  
Element Method

scholarly journals ANALYSIS OF CRACKS AT THE TORSION VALLARS CAUSED WITHOUT LOADING

2021 ◽  
Vol 07 (03) ◽  
pp. 72-79
Author(s):  
Tehran Mammadli Tehran Mammadli
Keyword(s):  
Finite Element Method ◽  
Fracture Toughness ◽  
Stress Intensity Factor ◽  
Finite Element ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Fracture Criterion ◽  
Fatigue Cracks ◽  
Tracked Vehicles ◽  
Element Method

Nowadays, the hull suspension systems that use torsion shafts as elastic suspension elements are fitted to the majority of modern tracked vehicles. The main type of failure in such systems is the fracture of the torsion shafts due to the formation of fatigue cracks, which leads to failure of the suspension assemblies. This work presents an analysis of fracture toughness of torsion shafts of a standard tracked chassis used to develop a family of multipurpose transport vehicles GT-TM, GT-TMS, etc. The analysis is carried out under an operating load level for a crack located on the cylindrical part of the torsion shaft, the plane of which is at an angle to the torsion shaft axis and coincides with the position of the main areas of the stress state. The calculation of fracture toughness is based on Irwin fracture criterion. The calculations of the maximum stress intensity factor along the crack front are performed using the finite element method in the ANSYS software package. The results of the analysis of fracture toughness are presented in the form of dependences of the critical depth of the crack on the ratio of the fracture half-length to its depth. The data obtained can be used to determine the residual life of torsion shafts of the tracked vehicles based on the chassis under consideration. Keywords: suspension system, fracture toughness of torsion shafts, edge crack, stress intensity factor, finite element method, Irwin fracture criterion.

Scientific and technical reserves for increasing service life of side frames of two-axle three-element freight cars

2020 ◽  
pp. 45-49
Author(s):  
Alexander Olegovich Belskiy ◽  
◽  
Alexander Vasilyevich Smolyaninov ◽  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Numerical Calculations ◽  
Analytical Evaluation ◽  
Main Criterion ◽  
Operational Characteristics ◽  
Element Method

The paper considers the existing problem associated with the operation of side frames of two-axle three-element bogies of freight cars. The main criterion for increasing the service life is the reduction of stresses in the side frame elements. The authors have proposed variants of side frames that increase the operational characteristics. The authors have also carried out numerical calculations of the proposed variants with the use of finite element method. As a result, the paper present the comparative analytical evaluation of the proposed side frames compared to the typical one.

Evolution of Texture and Strain States in AA 3003 Sheet during Sandwich Rolling

2006 ◽  
Vol 116-117 ◽  
pp. 320-323
Author(s):  
Moo Young Huh ◽  
J.K. Kim ◽  
Jael Chul Lee ◽  
Han Gil Suk
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Property ◽  
Crystallographic Texture ◽  
Uniform Strain ◽  
Texture Formation ◽  
The Finite Element Method ◽  
Sandwich Rolling ◽  
Element Method

This work focuses on the strain states of the mid AA 3003 strip sandwiched in between either AA 3003 sheets or STS 430 sheets. For that purpose, the strain states at various through-thickness layers were analyzed by measurements of crystallographic texture and by simulations with the finite element method (FEM). During sandwich rolling, the material property of outer sheets of sandwich samples played an important role in the evolution of the strain states and the corresponding texture formation. In the mid AA 3003 sheets, rolling with the harder outer sheets gave rise to pronounced through-thickness texture gradients, whereas fairly uniform strain states prevailed during rolling with the outer sheets of the same AA 3003.

Numerical Simulation Analysis on Repairing Hole of UAV Wing

2013 ◽  
Vol 690-693 ◽  
pp. 2891-2895
Author(s):  
Guo Dong Jin ◽  
Li Bin Lu ◽  
Liang Xian Gu ◽  
Juan Liang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Service Life ◽  
Simulation Analysis ◽  
High Stress ◽  
Reference Value ◽  
Safety Standards ◽  
Aerial Vehicle ◽  
Element Method

Parachute recovery of UAV is often caused of holes and other injuries on wings, that are required repair and maintenance. The surface of the patch will form the high stress area, that affects UAV using life and safety .But repair method is good or bad directly affects size of the high stress area. Based on finite element method, the broken hole repairing method was formulated and validated by ANSYS. The method could minimize the high stress area as far as possible, and economically repair broken hole of wing in certain precision and safety standards condition. It has a certain reference value for UAV repair and management, and has reference significance for extending the service life of the UAV. Key words: Finite element method; Unmanned Aerial Vehicle (UAV); Simulation; Hole of wings

scholarly journals Assessment of the reinforcing ability of a composite bandage for modern pipeline repair systems

2021 ◽  
Author(s):  
Eugen Savchuk ◽  
Viktor Rubashevskyi ◽  
Sergiy Shukayev
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Comparative Analysis ◽  
Service Life ◽  
Close Agreement ◽  
The Finite Element Method ◽  
Strain Ageing ◽  
Term Operation ◽  
Reinforced Steel

Abstract. The long-term operation of pipelines, which, in many cases, exceeds their regulatory service life, causes the strain ageing of metal, as well as the appearance of local mechano-corrosive damages. In this regard, the use of composites to reinforce worn pipelines constitutes one of today’s most promising technologies. In this study, a comparative analysis was performed between the composite-reinforced steel pipe calculations that were conducted using the finite element method (FEM), and those that were conducted in accordance with the DSTU ISO 24817:2019 standard. The FEM numerical calculations were carried out using the complete factorial experiment design (consisting of three factors at three levels, with twenty-seven calculations in total). Based on the results of these calculations, a regression model was developed to assess the circular deformation of the pipe’s outer surface depending on the thickness of the bandage, the thickness of the pipe, and the internal pressure. The FEM calculations were found to be in close agreement with analytical results.

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