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Object-oriented programming in nonlinear finite element analysis
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DOI：10.1016/S0045-7949(98)00054-6.png)
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Object-oriented programming has already shown to provide numerical scientists with adequate means for improving modularity in basic linear finite element codes. It is demonstrated here that this holds for nonlinear analysis, provided that the right types of objects with adequate capabilities are defined for handling nonlinear behaviours. In order to implement nonlinear models together with alternative methods for solution control, for nonlinear equation solving and for linear equation solving, a set of three classes is introduced: Problem, Nonlinear-Solver and LinearSolver. C++ examples implementing advanced algorithms indicate that these classes achieve a fair degree of programming flexibility and reusability. They thus provide an appropriate basis for modular nonlinear finite element programming. (C) 1998 Elsevier Science Ltd. All rights reserved.
Keyword:
finite element method
nonlinear analysis
linear equation system
nonlinear equation system
solution control
object-oriented programming
engineering software
C++
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