The Finite Element Program

The performance of products can be improved if numerical simulations accompany their development. If simulations replace a part of costly experiments, the development costs can be significantly reduced. If the size of prototypes is limited by the dimensions of experimental facilities, finite element models can take on any dimensions. Furthermore, they can be adapted quickly and easily to changed geometry or material parameters. The modification of prototypes is often only possible to a limited extent.

The applied model equations are established and the calculation results are tangible by means of sophisticated routines for visualization, so that FEM is increasingly used in industry for the development and optimization of products. Selected projects that CENIT has supported in recent years show their versatile applicability.

Realistic simulations for the realization of ideas

The complex deformation behavior of solids can be described with differential equations in space and time. Although the potential of differential equations is very high, they can only be solved analytically in special cases. Numerical solutions are possible with the finite element method, implemented in Abaqus. With Abaqus not only the model equations of solids can be solved with high accuracy, even the Navier-Stokes equations and the Maxwell equations are implemented. They are used to model the mechanics of liquids and gases and the physical behavior of electromagnetic systems.

Abaqus / CAE

With Abaqus/CAE finite element models can be created, edited, monitored, diagnosed and displayed quickly and efficiently. The parameterization of models provides access to optimizations that can be created and executed comfortably with SIMULIA Isight. By means of scripting the product can be customized to your specific requirements, up to the design of graphical user interfaces. Abaqus is highly flexible, as it can integrate your own programmed functions. In this way, special material models developed in your company can also be included. With the existing CAD interfaces, finite element models can be created on the basis of CAD data in a short time. In this way the potential of CAD models can be fully exploited in your company.

Abaqus / Standard

Abaqus/Standard provides a large number of routines that can be used to numerically analyze structural models in implicit formulation. Thus, this product is particularly suitable for the analysis of structures with slow movements as well as static boundary states. Here Abaqus/Standard provides numerical solutions of high quality. Typical application examples are the analysis of elastomeric bearings with strongly non-linear material behavior and the analysis of the stability of thin-walled shells with geometrically non-linear deformation behavior. Even the delamination of composite materials and the crack propagation in damaged materials can be investigated in detail. Besides analyses in the time domain, eigenvalue analyses provide access to vibration modes in the frequency domain. Special finite elements can even be used to investigate the acoustics inside vehicles more precisely as a function of engine dynamics.

Abaqus / Explicit

Abaqus/Explicit is developed for the calculation of highly dynamic processes. It is particularly suitable for the simulation of short, transient effects. It can be used to investigate ballistic impacts as well as the crash suitability of cars. The simulation of forming processes is another strength of Abaqus/Explicit. Various powerful contact formulations are provided to investigate abrupt transitions between adherence and sliding in detail. Once the propagation of compression waves and the associated deformation under impact-like loading have been evaluated with Abaqus/Explicit, the calculation can be continued with Abaqus/Standard, so that the mechanics of structures can be analyzed efficiently even over long periods of time. In addition to direct equation solvers, even large structures with a large number of degrees of freedom can be investigated using iterative equation solvers.

Abaqus / Multiphysics

Abaqus/Multiphysics is implemented in Abaqus/Standard and Abaqus/Explicit. The fact that Abaqus/Multiphysics is listed separately here is to show that Abaqus is not only broadly based in structural mechanics. Abaqus can also be used to numerically analyze a large number of interactions between different media. For example, the gas pressure in an airbag that leads to its deployment can be taken into account. Piezoelectric effects can also be included. One application example is piezo motors, small motors used in medical technology. The fact that electrical conductors heat up when current flows can also be considered, including thermal expansion. Electrical fuses and light bulbs are two typical applications here. The increase in temperature that can be observed in large plastic deformations of metallic materials can also be analyzed numerically. Material parameters such as the yield point or the modulus of elasticity can be determined as a function of temperature. Thus even the rolling of thick-walled steels can be realistically simulated. With regard to geotechnical applications, the effects of fluid pressure can also be modelled.

The selection of interactions in the fields of

  • Hydrostatic Fluid Mechanical,
  • Piezoelectric-Mechanical,- Structural
  • Acoustic,
  • Thermal
  • Electric,
  • Thermal
  • Mechanical and-
  • Thermal Fluid Mechanical

shows the high potential of Abaqus.

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