scholarly journals Experimental and Numerical Investigations of Cement Bonding Properties

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7235
Author(s):  
Ionut Lambrescu ◽  
Catalin Teodoriu ◽  
Mahmood Amani
Keyword(s):  
Finite Element ◽  
Energy Demand ◽  
Field Data ◽  
Laboratory Data ◽  
Experimental Setup ◽  
Renewable Energy Resources ◽  
Element Analysis ◽  
Well Integrity ◽  
Bonding Properties ◽  
Interaction Modeling

Well integrity is of high importance during the entire well life span especially when renewable energy resources such as geothermal are designed to cover the increasing world energy demand. Many studies have documented the importance of the casing–cement interfacial bonding to ensure critical well integrity achievements; however, laboratory experiments and field data are not always aligned. Furthermore, Finite Element Analysis shows relatively high discrepancies compared with the results of various scholarly published works. The limitations in the FEA are most probably generated by the casing–cement interaction modeling parameters. Typically, the contact between casing and cement is modeled using the so-called CZM method, which includes the shear debonding process into the FEA. Several setups have been used in the past to determine the interfacial casing–cement bonding shear strength. Some of these setups are briefly summarized herein. The novelty of this paper consists in the combination of a relatively simple experimental setup with the finite element modeling of the experiment itself to demonstrate that it is important to acquire accurate laboratory data for debonding simulations and, thus, to improve the well integrity prediction. The aim of this paper is to better understand the limitations of the finite element method when modeling shear bonding of the cement and, in the same, to verify that the proposed experimental setup can be modelled using numerical approaches. The successful numerical simulation can later be used for upscaled models. The results confirm the experimental push down setup and aid engineers to further understand and validate CZM models and optimize the well design to achieve maximum well integrity potential. Our results are within 1% error from the average field data.

A Screening Methodology to Rapidly Reduce ILI Data, Visualise and Determine Most Detrimental Defects in Pipelines

2017 ◽  
Author(s):  
Nicolas O. Larrosa ◽  
Pablo Lopez-Crespo ◽  
Robert A. Ainsworth
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Detailed Analysis ◽  
Field Data ◽  
Oil And Gas ◽  
Element Analysis ◽  
Starting Point

The amount of data requiring detailed analysis from that obtained during in-line inspection (ILI)is reduced by a screening methodology. The methodology uses ILI outputs (dimensions of flaws, orientation and distance from starting point) to generate a visualisation of the pits within the pipeline, a ranking of pits in terms of sphericity (roundness) and depth, to evaluate pit density and generate the models for finite element analysis. The rendering tool allows a clearer view of defects within the pipelines and provides a simplified way to focus on critical pits. For a particular case of in-field data provided by BP, the number of pits in a 12-inch riser of 11 km length was reduced from 1750 obtained to 43, 15 or 4 requiring analysis, depending on the level of conservatism introduced by the analyst. The tool will allow Oil and Gas owners and operators to reduce the immense amount of data obtained during pigging to a much less time-consuming set for flaw assessment.

Full-History Finite Element Modelling of Pipe-in-Pipe Flowline System: From Installation to Operation

2013 ◽  
Author(s):  
Facheng Wang ◽  
Zhigang Liu ◽  
Xinshuai Liu
Keyword(s):  
Finite Element ◽  
Energy Demand ◽  
Oil And Gas ◽  
Cost Effective ◽  
General Purpose ◽  
Gas Reservoirs ◽  
Element Analysis ◽  
Beam Elements ◽  
3D Simulation Model ◽  
The Time Domain

Developments of oil and gas reservoirs in South China Sea are presently accelerated, to cope with the significant increase in energy demand from the mainland. Pipe-in-Pipe (PIP) flowline systems have been widely employed in this region and are continuously being considered for further developments. This is due to its significant thermal insulation capacity to deal with the High Pressure and High Temperature (HPHT) issue. However, the methods in industry for design of PIP systems usually have two side extremes. Simplified analytical approach may lack of accuracy and detailed FE analysis always brings considerably sophisticated modelling and post-processing tasks. To overcome this situation, COTEC Offshore Solutions, together with its mother company, China Offshore Oil Engineering Company, have developed a cost-effective, beam elements based, 3D simulation model using ABAQUS, a general purpose finite element analysis (FEA) package. The mode allows complicated structures of PIP system to be represented in an effective way and adopts a representation of stinger for S-lay installation analysis. A full-history time-dominate analysis from installation to operation is performed in one model, rather than the commonly used ‘snapshot’ analysis. In this study, a simplified modeling guidance of PIP components have been suggested. On the basis of the guidance, a novel 3D beam-elements based model has been produced to accurately represent complex PIP structural behaviors, but with minimum increase in modeling complexity. The analysis is carried out on the time-domain basis, which permits the full strain and stress history of the installation and operation to be observed and the most onerous time-point during the full installation and operation to be captured.

An Approach to Reduce the Amount of ILI Data in Fatigue Analysis of Pits in Pipelines

2017 ◽  
Author(s):  
Nicolas O. Larrosa ◽  
Pablo Lopez-Crespo ◽  
Robert A. Ainsworth
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Detailed Analysis ◽  
Field Data ◽  
Oil And Gas ◽  
Fatigue Analysis ◽  
Element Analysis ◽  
Starting Point

This paper presents a screening methodology that is used to reduce the amount of data requiring detailed analysis from that obtained during in-line inspection (ILI). The methodology uses ILI outputs (dimensions of flaws, orientation and distance from starting point) to generate a visualisation of the pits within the pipeline, a ranking of pits in terms of sphericity (roundness) and depth, to evaluate pit density and generate the models for finite element analysis. The rendering tool allows a clearer view of defects within the pipelines and provides a simplified way to focus on critical pits. For a particular case of in-field data provided by BP, the number of pits in a 12-inch riser of 11 km length was reduced from 1750 obtained to 43, 15 or 4 requiring analysis, depending on the level of conservatism introduced by the analyst. The tool will allow Oil and Gas owners and operators to reduce the immense amount of data obtained during pigging to a much less time-consuming set for flaw assessment.

Investigating a Novel Design Dental Implant by Using Finite Element Analysis and Experimental Setup

2020 ◽  
Vol 10 (7) ◽  
pp. 915-921
Author(s):  
Yasar Sen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Analysis ◽  
Dental Implant ◽  
Experimental Studies ◽  
Numerical Data ◽  
Experimental Setup ◽  
Cnc Machine ◽  
Element Analysis ◽  
Screw Pitch

Objectives: In this study, dental implants with three different tooth pitch are designed and tested under static loads and fatigue analysis. In order to reveal the strengths of the different implant designs in dental implant application, the experimental setup where real physical environments were created experimental data was obtained, and these data were compared with numerical data. Materials and Methods: It is difficult to find an analytical solution for problems involving complex geometries. For this reason, numerical methods such as finite element analysis (FEA) are used. For compared finite element results and experimental analysis a new experimental setup has been created to simulate the physical conditions inside the mouth. In this arrangement, the temperature is close to ideal with the acidic environment inside the mouth. Firstly, the geometrical implant system determined on the CNC machine was produced. Results and Conclusion: In this study, dental implant research with 3 different screw pitch was performed. The results obtained from the experimental results were compared with the results obtained from the numerical analysis and it was observed that the accuracy of the numerical analysis was approximately 95%. It was observed that the tensions were less in the dental implant with higher number of screw pitch. In terms of the difficulty of experimental studies, finite element analysis saved both time and money. Thanks to this method, different scenarios can be applied to the optimum design of the dental implant and it can be designed in a computer environment before applying to the patient.

Investigation of Pipe Strain Measurements in a Curved Wide Plate Specimen

2010 ◽  
Author(s):  
Stijn Hertele´ ◽  
Wim De Waele ◽  
Rudi Denys ◽  
Jeroen Van Wittenberghe ◽  
Matthias Verstraete
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Measurement ◽  
Entire Range ◽  
Experimental Setup ◽  
Element Analysis ◽  
Widespread Application ◽  
Strain Measurements ◽  
Plate Specimen ◽  
Girth Welds

Throughout the last two decades, curved wide plate (CWP) tests have proven to be highly valuable to evaluate the strain capacity of defected girth welds. Despite its widespread application, the CWP test is not yet standardized. In particular, the effects of specimen geometry and deformation measurement setup on the measurement of pipe (remote) strain have not yet been thoroughly documented. Recently, Laboratory Soete published its ‘UGent’ guidelines for CWP testing, in which advice is given on the entire experimental setup. This paper elaborates a finite element analysis of the effect of the CWP specimen’s geometry on the strain measurement. It is found that, following the UGent guidelines and under the assumptions of the study, the geometry has a limited influence for the entire range of investigated materials and pipe dimensions. This indicates that meeting the UGent guidelines for CWP testing yields representative pipe strain measurements.

Steel Storage Tank Shell Settlement Assessment Based on Finite Element and API Standard 653 Analyses

2008 ◽  
Author(s):  
Mohamed R. Chebaro ◽  
Nader Yoosef-Ghodsi ◽  
Howard K. Yue
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Storage Tank ◽  
Field Data ◽  
Specific Information ◽  
Storage Tanks ◽  
Element Analysis ◽  
Fea Model ◽  
Actual Field ◽  
Allowable Settlement

API Standard 653 addresses issues related to the inspection, repair, alteration and reconstruction of steel storage tanks built according to API Standard 650 or API 12C to help maintain tank integrity. Although the standard covers three types of tank settlement, namely edge, bottom and shell, this paper focuses on the assessment of shell settlement. It also provides a comparison between an analytical model based on API Standard 653 and a finite element analysis (FEA) model that replicates field operating loading and settlement conditions of storage tanks. A basis for comparison between both models was established from the maximum allowable settlement and strain values. Several scenarios were generated using actual field data collected from steel storage tanks located in Alberta to illustrate the correlation between the two models. Specific information on the storage tanks under consideration cannot be disclosed for confidentiality reasons.

Experimental Research on Bond Behavior between Recycled Concrete and Rebar

2014 ◽  
Vol 926-930 ◽  
pp. 561-564
Author(s):  
Chen Xia Wang ◽  
Feng Yun Li ◽  
Yu Liang Hou
Keyword(s):  
Finite Element ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Element Analysis ◽  
Anchorage Length ◽  
Detection Techniques ◽  
Pull Out ◽  
Bonding Properties ◽  
The Impact

Through a pull-out test was designed, by means of slotted steel strain gauge pasted point detection techniques, and finite element simulation. The load-slip curves between recycled concrete with different recycled coarse aggregate replacement percentage and rebar were recorded. This article studies the impact of different recycled aggregate replacement rate and the anchorage length for the bond strength between the recycled aggregate concrete and reinforced, and provides a beneficial reference for engineering design of recycled concrete structure under similar conditions. Come to the bonding properties of reinforced recycled concrete with recycled aggregate rate increase gradually decrease in the anchorage length sufficient to meet the design requirements, performance depends on the pull-out strength of reinforced recycled concrete and reinforced the bond. Through the finite element analysis software ANSYS, the analysis of simulation results and test results are in good agreement.

Finite Element Analysis of Composite Offshore Wind Turbine Blades Under Operating Conditions

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
M. Tarfaoui ◽  
M. Nachtane ◽  
H. Boudounit
Keyword(s):  
Finite Element ◽  
Wind Turbine ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Turbine Blades ◽  
Operating Conditions ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Element Analysis

Abstract World energy demand has increased immediately and is expected to continue to grow in the foreseeable future. Therefore, an overall change of energy consumption continuously from fossil fuels to renewable energy sources, and low service and maintenance price are the benefits of using renewable energies such as using wind turbines as an electricity generator. In this context, offshore wind power refers to the development of wind parks in bodies of water to produce electricity from wind. Better wind speeds are available offshore compared to on land, so offshore wind power's contribution in terms of electricity supplied is higher. However, these structures are very susceptible to degradation of their mechanical properties considering various hostile loads. The scope of this work is the study of the damage noticed in full-scale 48 m fiberglass composite blades for offshore wind turbine. In this paper, the most advanced features currently available in finite element (FE) abaqus/Implicit have been employed to simulate the response of blades for a sound knowledge of the mechanical behavior of the structures and then localize the susceptible sections.

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