Numerical Evaluation of Mechanical Property Change and Collapse Strength of ERW Pipes Considering Manufacturing Process

2018 ◽  
Author(s):  
Seong-Wook Han ◽  
Soo-Chang Kang ◽  
Jiwoon Yi ◽  
Ho-Kyung Kim
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Analytical Model ◽  
Manufacturing Process ◽  
High Performance ◽  
Oil And Gas ◽  
Large Change ◽  
Outer Diameter ◽  
Element Analysis ◽  
Collapse Strength

Along with the development of the energy industry, demand for oil and gas pipelines has increased, and as the low oil price era has been prolonged, more economical pipe design and construction are required. Typical examples are ERW pipes used as OCTG or reel-lay pipeline. The ERW pipe is made by passing the plate through continuous rollers, where repetitive loading and unloading causes unintentional plastic deformation and changes in initial steel properties. So, this study focused on both the change of mechanical properties during manufacturing process and collapse strength of ERW pipe considering the Bauschinger effect in order to produce more economical and high performance steel pipe. In this paper, the ERW manufacturing process was divided into three stages: forming station, sizing station, and flattening station. The ERW manufacturing process was simulated as 3D nonlinear finite element models using ABAQUS (6.14-1). Then, the change of mechanical properties at each process station was examined through finite element analysis and PEEQ, Alpha, and residual stress in each process station were evaluated for maintaining continuity of analysis. And flattening station where the reverse bending gives a large change in the mechanical properties was also performed. Finally, the collapse strength of the ERW pipe was evaluated in consideration of the change in compression strength during the manufacturing process. The ABAQUS analytical model was verified by showing analytical results to be identical with the outer diameter measured from the full-scale size pipes. Using the developed analytical model, it is possible to numerically predict the mechanical properties and collapse strength of ERW pipe.

Prediction of Mechanical Properties of ERW Pipes Considering Manufacturing Process Through Numerical Analysis

2018 ◽  
Author(s):  
Seong-Wook Han ◽  
Soo-Chang Kang ◽  
Jiwoon Yi ◽  
Ho-Kyung Kim
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Manufacturing Process ◽  
High Performance ◽  
Oil And Gas ◽  
Outer Diameter ◽  
Process Stage ◽  
Repetitive Loading ◽  
Prediction Of Mechanical Properties ◽  
Abaqus Model

Along with the development of the energy industry, demand for oil and gas pipelines has increased, and as the low oil price era has been prolonged, more economical pipe design and construction are required. Especially, ERW pipe has been expanding its range of applications, which is advantageous in terms of productivity and price. ERW pipes are made by passing through continuous rollers, where unintentional plastic deformation such as the Bauschinger effect occurs. Since plastic deformation caused by repetitive loading and unloading changes the initial properties of steel, it is necessary to precisely predict the final properties of the pipe as well as an accurate understanding of the manufacturing process. So, this study focused on evaluating the effects of manufacturing process considering plastic deformation for high performance ERW pipe manufacturing. In this paper, three manufacturing process stages of ERW pipe were simulated as 3D nonlinear finite element models using ABAQUS: forming stage, sizing stage, and flattening stage. And the ABAQUS model was verified by comparison with the outer diameter measured from full-scale size pipes. In order to maintain the continuity of analysis between each manufacturing process stage, PEEQ, Alpha and residual stress were obtained from each manufacturing process stage, and then these mechanical properties were mapped to the next manufacturing process stage. And change of mechanical properties during the each manufacturing process stage were examined. Finally, the change of material properties at the flattening stage where reverse bending occurs was evaluated, especially in influence of sizing ratio on the flattening stage. Through the developed analytical model, numerical prediction of the mechanical properties of ERW pipe is possible.

Finite Element Modeling of Pad Deformation due to Diamond Disc Conditioning in Chemical Mechanical Polishing (CMP)

2012 ◽  
Author(s):  
Emmanuel A. Baisie ◽  
Z. C. Li ◽  
X. H. Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Material Removal ◽  
High Performance ◽  
Removal Rate ◽  
Chemical Mechanical Planarization ◽  
Element Analysis ◽  
Fea Model ◽  
Pad Wear ◽  
Diamond Disc

Chemical mechanical planarization (CMP) is widely used to planarize and smooth the surface of semiconductor wafers. In CMP, diamond disc conditioning is traditionally employed to restore pad planarity and surface asperity. Pad deformation which occurs during conditioning affects the material removal mechanism of CMP since pad shape, stress and strain are related to cut rate during conditioning, pad wear rate and wafer material removal rate (MRR) during polishing. Available reports concerning the effect of diamond disc conditioning on pad deformation are based on simplified models of the pad and do not consider its microstructure. In this study, a two-dimensional (2-D) finite element analysis (FEA) model is proposed to analyze the interaction between the diamond disc conditioner and the polishing pad. To enhance modeling fidelity, image processing is utilized to characterize the morphological and mechanical properties of the pad. An FEA model of the characterized pad is developed and utilized to study the effects of process parameters (conditioning pressure and pad stiffness) on pad deformation. The study reveals that understanding the morphological and mechanical properties of CMP pads is important to the design of high performance pads.

High-Ampacity Overhead Power Lines With Carbon Nanostructure–Epoxy Composites

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
V. S. N. Ranjith Kumar ◽  
S. Kumar ◽  
G. Pal ◽  
Tushar Shah
Keyword(s):  
Finite Element ◽  
Analytical Model ◽  
High Performance ◽  
Electrical Power ◽  
Power Lines ◽  
Fe Model ◽  
Carbon Nanostructure ◽  
Element Analysis ◽  
Core Diameter ◽  
Overhead Power Lines

Design of high-performance power lines with advanced materials is indispensable to effectively eliminate losses in electrical power transmission and distribution (T&D) lines. In this study, aluminum conductor composite core with carbon nanostructure (ACCC–CNS) coating in a multilayered architecture is considered as a novel design alternative to conventional aluminum conductor steel-reinforced (ACSR) transmission line. In the multiphysics approach presented herein, first, electrothermal finite element analysis (FEA) of the ACSR line is performed to obtain its steady-state temperature for a given current. Subsequently, the sag of the ACSR line due to self-weight and thermal expansion is determined by performing thermostructural analysis employing an analytical model. The results are then verified with those obtained from the FEA of the ACSR line. The electrothermal finite element (FE) model and the thermostructural analytical model are then extended to the ACCC–CNS line. The results indicate that the ACCC–CNS line has higher current-carrying capacity (CCC) and lower sag compared to those of the ACSR line. Motivated by the improved performance of the ACCC–CNS line, a systematic parametric study is conducted in order to determine the optimum ampacity, core diameter, and span length. The findings of this study would provide insights into the optimal design of high-performance overhead power lines.

Impact of Grain Structure and Material Properties on Via Extrusion in 3D Interconnects

2015 ◽  
Vol 12 (3) ◽  
pp. 118-122 ◽  
Author(s):  
Tengfei Jiang ◽  
Chenglin Wu ◽  
Jay Im ◽  
Rui Huang ◽  
Paul S. Ho
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Grain Size ◽  
Finite Element ◽  
Analytical Model ◽  
Material Properties ◽  
Grain Structure ◽  
Element Analysis ◽  
Silicon Vias ◽  
The Relationship

In this article, the effects of Cu microstructure on the mechanical properties and extrusion of through-silicon vias (TSVs) were studied based on two types of TSVs with different microstructure. A direct correlation was found between the grain size and the mechanical properties of the vias. Both an analytical model and finite element analysis (FEA) were used to establish the relationship between the mechanical properties and via extrusion. The effect of via/Si interface on extrusion was also studied by FEA. The results suggest small and uniform grains in the Cu vias, as well as stronger interfaces between the via and Si led to smaller via extrusion, and are thus preferable for reduced via extrusion failure and improved TSV reliability.

Mechanical Properties Characterization and Finite Element Analysis of Epoxy Grouts in Repairing Damaged Pipeline

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Lim Kar Sing ◽  
Nordin Yahaya ◽  
Alireza Valipour ◽  
Libriati Zardasti ◽  
Siti Nur Afifah Azraai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Structural Integrity ◽  
Oil And Gas ◽  
Flexural Behavior ◽  
Fe Model ◽  
Element Analysis ◽  
Structural Repair ◽  
Repair Mechanisms ◽  
Infill Material

Oil and gas pipelines are subjected to various types of deterioration and damage over long service years. These damaged pipes often experience loss of strength and structural integrity. Repair mechanisms have been developed in restoring the loading capacity of damaged pipelines, and composite repair systems have become popular over the past few years. The mechanical properties of the putty/grout are critical to their potential application as infill materials in structural repair. In this paper, the compression, tensile, and flexural behavior of four epoxy grouts was investigated through laboratory tests. The stiffness of the grouts for compression, tensile, and flexural was found to be 6 GPa to 18 GPa, 4 GPa to 15 GPa, and 4 GPa to 12 GPa, respectively. The ultimate strength for all grouts was found from 62 MPa to 87 MPa, 18 MPa to 38 MPa, and 34 MPa to 62 MPa under compression, tensile, and flexural tests, respectively. The behavior of all the tested grouts is discussed. A finite element (FE) model simulating a composite-repaired pipe was developed and compared with past studies. The FE results show a good correlation with experimental test with margin of error less than 10%. By replacing the infill properties in FE model to mimic the used of different infill material for the repair, it was found that about 4–8% increment in burst pressure can be achieved. This signifies that the role of infill material is not only limited to transferring the load, but it also has the potential to increase overall performance of composite-repaired pipe.

Finite Element Analysis of Electrical Explosion Spraying Technology

2012 ◽  
Vol 429 ◽  
pp. 72-77
Author(s):  
Yan Ni Wang ◽  
Xiao Lin Jiang ◽  
Ping Yang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
High Performance ◽  
Electrical Explosion ◽  
Substrate Material ◽  
Interface Temperature ◽  
Analysis Software ◽  
Element Analysis ◽  
Peak Voltage

In order to master the basic laws of preparation coating by electrical explosion spraying technology and obtain coating with higher mechanical properties, finite element analysis software is used to simulate temperature field in process of coated condensation. Some basic rules of process parameters are drawed. To obtain high-performance coatings, coating material whose sedimentary particle has a higher interface temperature is first considered according to the substrate material property parameters. In the process of prepare coating, voltage should be better to use peak Voltage of electric explosion spraying equipment. Self-inductance of circuit should be as low as possible.

scholarly journals Preparation and Finite Element Analysis of Fly Ash/HDPE Composites for Large Diameter Bellows

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4204
Author(s):  
Angxuan Wu ◽  
Lan Jia ◽  
Wenwen Yu ◽  
Fengbo Zhu ◽  
Fuyong Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Fly Ash ◽  
High Performance ◽  
Large Diameter ◽  
Value Added ◽  
Ground Subsidence ◽  
Tensile Yield Strength ◽  
Element Analysis

In recent years, buried bellows have often had safety accidents such as pipeline bursts and ground subsidence due to the lack of adequate mechanical properties and other quality problems. In order to improve the mechanical properties of bellows, fly ash (FA) was used as a reinforced filler in high density polyethylene (HDPE) to develop composites. The FA was surface treated with a silane coupling agent and HDPE-g-maleic anhydride was used as compatibilizer. Dumbbell-shaped samples were prepared via extrusion blending and injection molding. The cross-section morphology, thermal stability and mechanical properties of the composites were studied. It was observed that when 10% modified FA and 5% compatibilizer were added to HDPE, the tensile yield strength and tensile breaking strength of the composites were nearly 30.2% and 40.4% higher than those of pure HDPE, respectively, and the Young’s modulus could reach 1451.07 MPa. In addition, the ring stiffness of the bellows was analyzed using finite element analysis. Compared with a same-diameter bellows fabricated from common commercially available materials, the ring stiffness increased by nearly 23%. The preparation method of FA/HDPE is simple, efficient, and low-cost. It is of great significance for the popularization of high-performance bellows and the high value-added utilization of FA.

Finite Element Analysis of Reinforced Concrete Beams with Exterior FRP Shell

2011 ◽  
Vol 243-249 ◽  
pp. 1461-1465
Author(s):  
Chuan Min Zhang ◽  
Chao He Chen ◽  
Ye Fan Chen
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Contact Interface ◽  
Accurate Calculation ◽  
Element Analysis

The paper makes an analysis of the reinforced concrete beams with exterior FRP Shell in Finite Element, and compares it with the test results. The results show that, by means of this model, mechanical properties of reinforced concrete beams with exterior FRP shell can be predicted better. However, the larger the load, the larger deviation between calculated values and test values. Hence, if more accurate calculation is required, issues of contact interface between the reinforced concrete beams and the FRP shell should be taken into consideration.

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