| Data Assignment > Overview of Data Assignment > Basic composition of data |
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Basic composition of data
The minimum amount of data necessary for finite element analysis is varied with the type of problem to be solved. VisualFEA can do 3 types of analysis : structural, heat conduction and seepage. And therefore, data required for these 3 types of problems are described below.
> Data for structural analysis
The attribute data necessary for structural analysis are basically composed of the following components:
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material properties: elastic constants, unit weight, thermal expansion coefficients, etc. |
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| structural boundary conditions: structural constraints or supporting states such as spring. | |
| load conditions: various types of applied forces including uniform force , moment, body force, etc. |
The above components are essential for structural analysis. Multiple load conditions can also be defined by linear combination of the load condition sets.
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load combinations: combinations of load condition sets defining multiple load condition. This item is available only for linear static structural model with more than 2 load condition sets. |
The following data items are additionally required to define other characteristics of the problem.
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local member connectivity: pin ended, rigid ended. |
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| dynamic motion: dynamic displacement, velocity and acceleration. When the necessary data are completely assigned, the problem are are ready for finite element solution. |
> Data for analysis of heat conduction
The data necessary for heat conduction analysis are basically composed of the following 2 components:
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material properties: thermal conductivities in X, Y and Z directions. |
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| heat and temperature boundary conditions: specified temperatures , specified heat flux, convection boundary conditions, heat source, etc. |
In order to make the problem solvable by VisualFEA, the material properties should be assigned to all elements, and at least one component of the heat or temperature boundary conditions should be applied.
> Data for seepage analysis
The data necessary for seepage analysis are basically composed of the following 2 components:
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material properties: flow conductivities in X, Y and Z directions , conductivity function, water content function. |
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| seepage boundary conditions: water head (open and confined), flux, point source, and initial water table. |
In order to make the problem solvable by VisualFEA, the material propertyies should be assigned to all elements, and an open or confined head boundary condition should be applied at least to one point of the model, as subsequently described.
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