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  • cemef@cemef.com.br

Structural Analysis (Finite Elements)

The Finite Element Method (FEM) consists of different numerical methods that approximate the solution of boundary value problems described by both ordinary differential equations and partial differential equations by subdividing the geometry of the problem into smaller elements, called finite elements, in which approximation of the exact solution can be obtained by interpolation of an approximate solution. With this type of method, tensions,displacements, for example, tensions, displacements, deformations, natural frequencies of vibration, mode of buckling, etc can be determined. The types of analyzes already executed by CEMEF are:

  • Structural analysis - statics, dynamics, fatigue, structural optimization (linear and nonlinear).
  • Thermal analysis - stationary and transient, linear and non-linear.
  • Computational fluid dynamics - CFD, fluid flow problems.
  • Linear statics - check of displacements and stresses.
  • Linear buckling - check of stability.
  • Nonlinear statics - problems of large displacements, mechanical conformation involving plasticity and buckling.
  • Stationary thermal - determination of the temperature distribution considering conduction, convection and radiation.
  • Transient thermal - temporal variation of the thermal distribution.
  • Modal - determination of natural modes and frequencies of vibration, with and without stiffening / softening effects.
  • Time response dynamics - variable base loads or excitations and mechanical shocks, also used in dynamic test simulations.
  • Harmonic response dynamics - sine / cosine-based loads or excitations.
  • Random response dynamics - random base loads or excitations.
  • Spectral response dynamics - used mainly in analyzes involving earthquakes (seismic loads).
  • Non-linear dynamics - time-varying loads involving contact problems.
  • Fatigue - variable loads in the time domain, determination of failure.
  • Structural optimization - allows optimization in terms of shape and size.

Computational Fluid Mechanics (CFD)

CFD is a branch of fluid mechanics in which the various equations that model the nature of the flow are solved computationally. Through computational fluid mechanics, it is possible to solve various engineering problems. The complexity of transport phenomena involving fluids and heat transfers can be assessed through domain discretization. With the help of CFD, you can do:

  • Geometric optimization in aerodynamic problems.
  • Dimensioning of hydraulic pumps and fans.
  • Improvement of ventilation systems and heat exchangers.
  • Lifting of loads due to outflow (wind, oscillations in hydraulic lines, etc.).

Analysis by discrete element method (DEM)

The discrete element method is a method of numerical simulation of the movement of a large number of particles within a time-varying fixed or mobile system. With this method it is possible to obtain a detailed description of the positions, velocities and forces acting on each body or particle as well as on the physical contours at each instant of time in the analysis due to frictional, electrostatic, magnetic, gravity and cohesive forces.


It is recommended to conduct inspections on existing equipment in order to provide increased reliability of its use. For this, CEMEF performs inspections using instruments to identify any cracks (ultrasound with phased array), reinforcement area in concrete structures or the presence of conduits in walls. Measurements of thickness, visual inspection for checking corrosion and painting of equipment are also carried out.

Experimental Analysis

In order to monitor the deformations and working conditions of your equipment, CEMEF has a technical team capable of measuring through extensometers and accelerometers.

Accurate monitoring of your equipment behavior can save time and expense in diagnosing and solving mechanical problems.


Extensometry is an experimental technique that allows to measure the deformations that occur in the surface of a structure under the action of mechanical loads and / or under the effect of temperatures. Associated with the structural integrity analysis, this technique allows the validation of mathematical models and the achievement of results according to the current condition of the equipment operation.

The monitoring with extensometers can also be used to determine the intensity of active loads.

CEMEF performs wireless extensometry for rotating systems.


Accelerometry is a method of motion analysis that allows, through accelerometers, to measure the dynamic effects (accelerations, velocities and displacements) in a structure. This sensor detects the movement produced by the change in speed or pattern of movements. Accelerometry evaluates the dynamic behavior of structures by defining the main natural frequencies of vibration and / or characterizing the dynamic loads.

The objective is to analyze resonance problems, evaluate the comfort and safety of users and propose solutions for vibration reduction.

Displacement Measurement Method

The linear displacements that occur in the structures are measured by the LVDT.

Development of electrical projects

Development of electrical projects of special equipment, machines, industrial plants, electric rooms, for example:

  • Lighting project
  • Grounding project
  • As-built of electrical circuits
  • Repowering
  • Energy distribution
  • Machines driving
  • Safety circuits (CCTV)

Preparation of drawings and documents based on national and international standards, such as:

  • Single-line diagrams
  • Interconnection diagrams
  • Equipment list
  • Technical specifications
  • Layout of panels
  • Data sheets
  • Descriptive memorials
  • Cable routing
  • List of materials
  • Operation manuals

3D Modeling and 2D Detailing

CEMEF develops 3D and 2D mechanical projects (detailing for manufacturing), technical manuals, devices and special machines, such as:

  • Machines with electric, hydraulic and pneumatic drive systems
  • Assembly line equipment for the automotive industry
  • Special devices for various tests
  • Assembly cells
  • Manipulators in general
  • Machining devices
  • Assembly jigs
  • As-built and modernization of industrial equipment
  • Lay-out and physical arrangements
  • Scanning of drawings
  • Maintenance drawings
  • Development of conveyor project attending all subjects