On the Design and Materials Selection of Composite Material Ocean Flexible Pipe

2015 ◽  
Vol 1090 ◽  
pp. 22-25
Author(s):  
Lin Zhao ◽  
Ming Lei Liu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Oil And Gas ◽  
Structure Design ◽  
Materials Selection ◽  
Flexible Pipe ◽  
Flexible Pipes ◽  
Selection Of

This paper aims to discuss the composite materials application in ocean oil and gas flexible pipes, from the functional principles to the technical methodology in materials selection and pipe structure design.

Tailoring Composite Materials Through Optimal Selection of Their Constituents

1992 ◽  
Vol 114 (3) ◽  
pp. 451-458 ◽  
Author(s):  
H. M. Karandikar ◽  
F. Mistree
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Multiobjective Optimization ◽  
Material Selection ◽  
The Other ◽  
Economic Factors ◽  
Optimal Selection ◽  
Structural Applications ◽  
Design Requirements ◽  
Selection Of

The use of composite materials has provided designers with increased opportunities for tailoring structures and materials to meet load requirements and changing and demanding environments. This has led to their increased use in structural applications. As with traditional materials the selection of an appropriate material for a design is important. In case of design using composite materials the selection of a material consists of selecting a fiber-resin combination which meets all design requirements. This involves choosing the fiber, the resin, and the proportion of these two constituents in the composite material. The phrase “material selection” refers to the problem of laminate selection. This corresponds to the task of choosing a fiber and resin combination based on technical and economic factors. Materials tailoring, on the other hand, involves manipulating the composition of the composite material to achieve desired properties and it is the selection of a fiber and resin simultaneously but separately. In this paper we present, through an example, a multiobjective optimization-based method for assisting a designer in tailoring composite materials for specific technical and economic objectives.

scholarly journals Mechanical Properties of GFR & Graphite Epoxy Polymer Composites

2020 ◽  
Vol 5 (6) ◽  
pp. 560-565
Author(s):  
A. Aakash ◽  
S. Selvaraj
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Polymer Composite ◽  
Epoxy Polymer ◽  
Significant Degree ◽  
Polymer Composite Material ◽  
Water Ingestion ◽  
Selection Of

Composite materials have the great potential and widely used as building material in numerous applications. Polymer composite material obtains the necessary properties in a controlled significant degree by the selection of strands and lattice. The properties of the materials have been selected by choosing the correct proportion of matrix and reinforcements. To build the quality of the material by expanding the fiber substance of the material. In this current examination, the mechanical properties of the glass fiber and graphite is strengthened with epoxy polymer composite were considered. Here the open embellishment method was received for the manufacture of the polymer composite The mechanical properties, for example, rigidity, compression quality, sway quality and water ingestion test was resolved according to the ASTM norms. The mechanical properties were improved as the filaments support content expanded in the grid material.

Composite Material Selection Using Multi Criteria Decision Making for Automobile Torsion Bar

2014 ◽  
Vol 573 ◽  
pp. 649-654 ◽  
Author(s):  
V.S. Chandrasekar ◽  
K. Raja ◽  
P. Marimuthu
Keyword(s):  
Decision Making ◽  
Composite Material ◽  
Composite Materials ◽  
Material Selection ◽  
Weight Ratio ◽  
Real Data ◽  
Multi Criteria Decision Making ◽  
Preference Relations ◽  
Torsion Bar ◽  
Selection Of

Automotive components made from composite materials can result in significant weight savings over steel and Aluminum. The main purpose of this research is to study about the selection of suitable composite material for automobile torsion bar which possesses good strength to weight ratio and yield considerable weight savings. This paper involves identification of potential composite materials, selection of evaluation criteria, use of fuzzy theory to quantify criteria values under uncertainty and application of fuzzy Linguistics to evaluate and select the best material for replacing conventional steel material with composite material used in automobile torsion bar. The strength of the proposed paper is the ability to deal with uncertainty arising due to the lack of real data in material selection for replacing the conventional material.Keywords:- Composite material, Incomplete linguistic preference relations, AHP, Decision analysis, Consistent fuzzy preference relations, Multi-criteria decision making

Development and Experimental Calibration of Numerical Model Based on Beam Theory to Estimate the Collapse Pressure of Flexible Pipes

2015 ◽  
Author(s):  
Jefferson Lacerda ◽  
Marcelo I. Lourenço ◽  
Theodoro A. Netto
Keyword(s):  
Structural Integrity ◽  
Oil And Gas ◽  
Numerical Models ◽  
Beam Theory ◽  
Gas Production ◽  
Operating Conditions ◽  
Flexible Pipe ◽  
Experimental Calibration ◽  
Collapse Pressure ◽  
Flexible Pipes

The constant advance of offshore oil and gas production in deeper waters worldwide led to increasing operational loads on flexible pipes, making mechanical failures more susceptible. Therefore, it is important to develop more reliable numerical tools used in the design phase or during the lifetime to ensure the structural integrity of flexible pipes under specific operating conditions. This paper presents a methodology to develop simple finite element models capable of reproducing the behavior of structural layers of flexible pipes under external hydrostatic pressure up to collapse. These models use beam elements and, in multi-layer analyses, include nonlinear contact between layers. Because of the material anisotropy induced by the manufacturing process, an alternative method was carried out to estimate the average stress-strain curves of the metallic layers used in the numerical simulations. The simulations are performed for two different configurations: one where the flexible pipe is composed only of the interlocked armor, and another considering interlocked armor and pressure armor. The adequacy of the numerical models is finally evaluated in light of experimental tests on flexible pipes with nominal internal diameters of 4 and 6 in.

Methodology for Fatigue Analysis in Flexible Pipes Based on Structural Reliability Considering S-N Bi-Linear Curve

2012 ◽  
Author(s):  
Fernando dos Santos Loureiro Filho ◽  
Edison Castro Prates de Lima ◽  
Luís Volnei Sudati Sagrilo ◽  
Carlos Alberto Duarte de Lemos
Keyword(s):  
Structural Reliability ◽  
Failure Modes ◽  
Oil And Gas ◽  
Linear Models ◽  
Fatigue Analysis ◽  
Flexible Pipe ◽  
Environmental Loads ◽  
Flexible Pipes ◽  
Different Types ◽  
Oil And Gas Companies

Flexible pipes are largely used by oil and gas companies all over the world to exploit oil and gas reserves located into the sea. These pipes are composed by different layers, each one with a specific function. The environmental loads can induce different types of failure modes in a flexible pipe. One important failure mode is associated with the fatigue damage in the tension armours. Fatigue analysis depends on various parameters that are uncertain. A reliability-based procedure to take into account these uncertainties in the fatigue analysis of flexible pipes has been recently proposed [1]. In this methodology the S-N curves have been modeled by a one-slope model. The present work expands this methodology in order to consider S-N bi-linear models.

scholarly journals Comparative Analysis of the Selection of Lay-Up Stacking of Polymer Composite Load-Bearing Elements for the Tail Section of Fuselage Structure of the Light Aircraft

2021 ◽  
Vol 346 ◽  
pp. 03111
Author(s):  
Tun Lin Htet ◽  
P.V. Prosuntsov
Keyword(s):  
Composite Material ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Design Optimization ◽  
Polymer Composite ◽  
Optimization Method ◽  
Load Bearing ◽  
Rear Part ◽  
Continuous Range ◽  
Selection Of

The problem of the selecting the optimal lay-up stacking of polymer composite materials for the load-bearing elements of the rear part of fuselage structure is considered. The comparison of two approaches to the design of the load-bearing elements is carried out. The first of them is the use of multilayered composite material for the load-bearing elements, the stacking angles of which is selected from a given discrete set, and the second is the use of composite material with a continuous range of variables in fabric lay-up angles. As a result design optimization, it is shown that using an optimization method with a continuous range of lay-angles allows reducing the weight of the load-bearing elements by 12.79%

scholarly journals Cable-stayed coverings for large-span public buildings

2021 ◽  
Vol 280 ◽  
pp. 07008
Author(s):  
Radomir Timchenko ◽  
Stanislav Popov ◽  
Dmitry Krishko ◽  
Goodary Rajeshwar ◽  
Aleksej Aniskin
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Optimization Problem ◽  
Optimal Result ◽  
Large Span ◽  
Roof Structure ◽  
Standard Design ◽  
Design Characteristics ◽  
Selection Of

Structural schemes of coverings using lightweight roof structure from modern composite materials are investigated in this paper. A comparison of two options for cable-stayed covering of a circus auditorium, one with an orthogonal mesh of cables (according to a standard design) and another one, with a mesh of cables formed by two groups of stabilizing cables are considered. The possibilities of reinforcement with composite material are analyzed. Calculation and preliminary selection of cable-stayed sections are also carried out and presented. The variations of the conditional volume with the relative sag arrows, for varying values of the coefficient qk have been investigated and shown on graphs. An optimization problem was solved and the optimal result with detailed calculations are proposed and presented in this research which enable the design of the cable-stayed coating with determination of its design characteristics. As a result, the optimum and most economical sections of the cable-stayed covering were obtained. The calculations also show the inexpediency of using a heavy roof structure for saddle cable-stayed coverings due to the exclusion of stabilizing cables from the operation with a large roof weight.

Prediction of Internal Pressure of Flexible Pipe

2019 ◽  
Author(s):  
Qiangqiang Shao ◽  
Ting Liu ◽  
Shuai Yuan ◽  
Peihua Han ◽  
Yong Bai
Keyword(s):  
Theoretical Model ◽  
Oil And Gas ◽  
Virtual Work ◽  
Fluid Pressure ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Petroleum Products ◽  
Burst Pressure ◽  
Flexible Pipe ◽  
Flexible Pipes

Abstract The flexible pipes are widely used in the oil and gas industry to transport petroleum products. The pipe might burst fails when a large internal fluid pressure acts on the pipe, and the consequences are disastrous. In order to ensure the security and reliability of flexible pipes in the application, the mechanical responses of the pipe subjected to high pressure loads should be carefully estimated. The main purpose of this paper is to investigate the burst pressure of the pipe. Based on the principle of virtual work, a theoretical model for stress and deformations of the pipe is established, which takes the material plasticity into consideration. In addition, a finite element model is developed by ABAQUS to verify the feasibility of the theoretical model. According to the verified model, it is efficient to predict the burst pressure and design its cross-section economically with its serving conditions.

scholarly journals A Grammatical Approach for Customization of Laminated Composite Materials

2010 ◽  
Author(s):  
Soumitra Nandi ◽  
Zahed Siddique ◽  
M. Cengiz Altan
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Volume Fraction ◽  
Material Selection ◽  
Laminated Composite ◽  
Component Selection ◽  
Wide Range ◽  
Laminated Composite Materials ◽  
Component Shape ◽  
Selection Of

The wide range of properties covered by the manufacturable fiber-matrix combinations of composite materials, along with their directional property characteristics, provides designers with material selection flexibility during designing composite material products. Meeting multiple property goals, however, complicates the design process as both the composite material selection and the component shape formation become complicated because the loading conditions and matrix calculations are needed to determine theoretical value of composite material properties. This paper presents a grammatical approach to simultaneously consider the shape and selection composite materials for a load-bearing component. Selection of composites involve determining the fiber and matrix, their volume fraction, and number of layers in different location of the component. A hip-replacement joint is designed using composite material to illustrate the approach.

Development of Technology for Creating Composite Materials of Machine Tool

2015 ◽  
Vol 9 (6) ◽  
pp. 714-719
Author(s):  
Ikuo Tanabe ◽  
Keyword(s):  
Thermal Conductivity ◽  
Composite Material ◽  
Composite Materials ◽  
Machine Tool ◽  
Specific Heat ◽  
Linear Expansion ◽  
Coefficient Of Linear Expansion ◽  
Selection Of ◽  
Density Coefficient ◽  
Hybrid Properties

A technology for creating new composite materials with hybrid properties desired by many designers was developed and evaluated. Young’s modulus, density, coefficient of linear expansion, specific heat and thermal conductivity were calculated through a newly developed software. This software has two functions which are (1) the selection of adequate materials and the calculation of their ratios to achieve specific desired properties in a new composite material (2) the calculation of resultant properties given that the component materials and their rations in a composite material are known. The new composite material for the tool post of a machine tool was manufactured and evaluated. It is concluded from the results that the technology was very effective and useful for development of a new composite material with several hybrid properties.

Sign in / Sign up

Export Citation Format

Share Document