Adiabatic is a term from fluid dynamics simulation. There is no heat transfer between adiabatic components and their environment.
Boundary conditions are forces having an external impact on a closed system, e.g. environment variables such as pressure and temperature.
Buckling is the giving way of components under compressive stress.
CAE is the abbreviation for Computer Aided Engineering and comprises all variants of computer support in all technical working processes such as CAD, FEM, CFD, MBS et al.
CFD stands for Computational Fluid Dynamics. Here, flows and particles are being calculated such as aerodynamics of aircrafts or granulate drying.
Cluster is a fast network of several computers with the main purpose of increasig calculating capacity.
In technical calculation we talk about contact if two different components contact each other and can be moved in one or more directions.
Convection is the heat transfer by movable particles (fluids and gases). There is no convection in vacuum.
Creeping is the time-dependent deformation of material at constant load. Creeping must be considered especially with metals and plastics under constant load.
The elastic modulus is a material property describing the relationship between stress and strain during an elastic deformation.
The Finite-Element-Method is a numerical calculation process dividing a problem or a calculation domain into a finite number of elements. The equations (mostly differential equations) are then being solved for each element. The following results give information about the complete calculation domain. Here, the number of elements determines the accuracy of the total results.
In engineering, this method is applied in structural mechanics as well as in fluid mechanics.
Hardening is the behaviour of materials under plastic stress. Mechanical strength changes with plastic deformation. Thus, either more or less power is needed to further deform the component.
The term “harmonic” describes a regularity in a problem, e.g. harmonic oscillations of components or harmonic electric or magnetic fields.
A flow is called laminar if no turbulences develop during movement of the gas or fluid.
We talk about plasticity in cases components are stressed beyond the elastic limit. These stresses cause irreversable deformations called plasticities.
Steady-state calculations are time-independent simulations.
Strain is the deformation of a component proportionately to the undeformed geometry. Thus, strain depends on the effective force and the material parameters.
In engineering, stress means the loading of components and materials. Stress is the force acting on a certain surface. All materials have a maximum stress describing how strong the corresponding material can be loaded before being damaged. Stress is divided into tensile/compression stress, shear stress and torsional stress.
The stress/strain diagram describes the relationship between strain and stress to be applied. It is mostly determined by tensile tests.
Determined by tensile test, tensile strength is the maximum stress a material can withstand (concerning the original cross section of the tensile test specimen). Thus, it describes the maximum load (and that is stress) of the material.
Thermal radiation is the transmission of heat by electromagnetic waves.
Transient calculations are time-dependent simulations.