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    LAMEF
    UNIDADE EMBRAPII

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    CHÂTEAU

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    LAMEF
    UNIDADE EMBRAPII

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    FLEXIBLE RISERS

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    FLEXIBLE RISERS

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    FRICTION WELDING MACHINES

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    Floating hoses

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MATERIALS ENGINEERING

Materials engineering or materials science is an interdisciplinary field primarily applied to investigate the relationships between the structure at various levels and the macroscopic properties of materials. In LAMEF, by conducting a series of tests and also micro and macrostructural assessments, we are able to define these relationships and consequently propose changes in the engineering design to achieve optimum performance.


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FINITE ELEMENT ANALYSIS (FEA)

In the late 1950s and early 1960s a method was proposed for solving partial differential equations. The finite element method (FEM), as it is known, emerged from the need to solve complex structural analysis problems in engineering and consists in the discretization of a continuous domain by “n” finite elements.

In LAMEF, the finite element method (FEM) is applied for structural development and optimization of components, test rigs and also to predict the mechanical behavior of industrial components, such as oil and gas pipelines, sleeve repairs of rigid pipelines, flexible pipeline structures, shackles, hooks and chains used for offshore production units anchoring.

In order to represent real operational conditions with a high level of accuracy, FEM results are calibrated and validated through real components tests, with monitoring systems composed by strain gages, optical fibers, acoustic sensors, accelerometers and photoelasticity. Validation methods are used to ensure model precision so that is possible to reduce further mechanical tests.

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PROSTHESES AND ORTOPAEDIC IMPLANTS TESTING

Since the pioneer work of John Charnley in the 1960’s with total hip replacement, prostheses and orthopaedic implants have evolved dramatically in terms of materials and design.

It is always mandatory to test new materials or concepts in order to guarantee safety and proper functionality. Using our facilities we are perfectly able to evaluate the metallurgical condition and the mechanical behavior of prosthetic components and whether they cope with specific requirements established in national and international standards.

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FIELD METALLURGICAL REPLICATION

Metallurgical replication is a non-destructive technique that is suitable for components that are too large, expensive, or time-consuming to replace and is used to establish cause and/or extent of damage and/or ageing mechanisms in metallic structures.

A small area of the surface of a component is ground and polished to a 1 micron finish and etched, revealing the microstructure. A piece of plastic is then placed on the etched surface, capturing the microstructure. The replication is then sent back to the metallurgical laboratory for analysis.

Replication is commonly performed at the heat-affected-zone (HAZ) of welds, an area particularly susceptible to creep damage as well stress corrosion cracking if a corrosive environment is present.

Working mainly for the downstream sector for decades, LAMEF has accumulated experience in metallurgical replication which makes it perfectly able to provide solutions and support for decision taking in daily basis issues of its clients concerning metallurgical aging and other forms of mechanical degradation of equipment and structures.

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MATERIALS SELECTION AND CHARACTERIZATION

At LAMEF we can assist our clients with material selection processes to ensure that the most reliable and economic materials are chosen for a particular application. The selection process may include a full characterization of the materials mechanical behavior and even a comprehensive evaluation of design.

The influence of the microstructure is always carefully considered and being in essence a metallurgy based laboratory, we can provide solutions in terms of heat treatment and/or processing routes in order to achieve the most optimized metallurgical condition.

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RESIDUAL STRESSES

Virtually all manufacturing and fabricating processes such as casting, welding, machining, molding, heat treatment, plastic deformation during bending, rolling or forging introduce residual stresses into the manufactured object.

Among the factors that are known to cause residual stresses are the development of deformation gradients in various sections of the piece in the event of thermal gradients, volumetric changes arising during solidification or from solid state transformations, and from differences in the coefficient of thermal expansion in pieces made from different materials.

Residual stresses affect a part similarly to externally applied stresses. If they are strong enough to overcome the structural integrity of the part, the part will warp or even crack when external service load is latter applied. The effect of residual stresses on the fatigue and corrosion fatigue behavior of engineering materials is a major topic of interest in LAMEF.

Using the latest technology in X-ray diffraction we are able to precisely measure residual stresses in small to medium size components. For large components or even field measurements we can move an experienced team to measure residual stresses using the semi-destructive deep-hole drilling technique.

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MATERIALS TESTING

Materials need testing to assess product quality, functioning, safety and reliability.

Effective materials testing covers verification of material characteristics for application trials, detection of defects, analysis of failures and improvement of new materials. Our materials testing services offer you comprehensive testing for metals, polymers and composites. Using the state-of-the-art equipment we can fully mechanically characterize engineering materials for the various sectors of the industry. We can carry out a wide range of material testing methods including static tensile, compression, bending, fatigue, impact, fracture toughness and environment assisted cracking.

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HARSH ENVIRONMENT TESTING

Currently the most promising frontier of exploration and production of oil and gas are the southeast coast of Brazil and the West coast of Africa, the so called pre-salt layer. Besides the challenges related to water depths of almost 3,000 meters, the oil is contaminated by high concentrations of CO2 and H2S which turns the use of carbon steel piping and equipment in general not a option.

In this extreme scenario, the selection and testing of corrosion resistant alloys (CRAs) is an important issue. At LAMEF we can simulate the service conditions that the materials will find in operation, including facilities for fatigue and fracture toughness tests in sea water with CO2 (sweet) and H2S (sour) with controlled concentrations of dissolved oxygen.