By Zia Javanbakht, Andreas Öchsner
This booklet bargains an in-depth perception into the general-purpose finite aspect software MSC Marc, that is disbursed via MSC software program company. it's a really expert application for nonlinear difficulties (implicit solver) that is universal in academia and undefined. the first target of this booklet is to supply a finished advent to a distinct function of this software program: the consumer can write user-subroutines within the programming language Fortran, that is the language of all classical finite point programs. This subroutine characteristic permits the person to interchange convinced modules of the middle code and to enforce new positive factors akin to constitutive legislation or new parts. therefore, the performance of industrial codes (‘black box’) can simply be prolonged by means of linking consumer written code to the most middle of this system. this selection permits to use a advertisement software program package deal with the flexibleness of a ‘semi-open’ code.
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Extra info for Advanced Finite Element Simulation with MSC Marc: Application of User Subroutines
2 Although the facility is provided, it is recommended to avoid long names. It is due to the fact that Marc does not support the free format yet. Another reason for avoiding long names is because they make the typing process a tedious job. The remedy to this is using some abbreviations instead of long phrases. A long name is usually downsized to an abbreviation with 3–5 characters. There are some suggestion in doing so. Usually if a name consists of four letters or less, omitting any letters will cause the loss of meaning.
E. capitalizing, punctuation, indentation etc. are all optional and user-dependent. However, it is recommended to stay loyal to a unique style throughout the project. For instance, it is good to avoid continuation lines and use indentations. Also it is easier to use lowercase letters for every statement. • Note that a pseudocode is used to outline what is going to be done in the program. e. the more experienced the user, the fewer details required. • Usually, a pseudocode starts with start or begin and ends with stop or end.
In this form, the block will be executed while a condition is true. The evaluation of the condition expression is done prior to executing the block and hence if the result is false then the block will not be executed. This form is a test-at-the-top form of loops. It is possible to convert from the first to the second form and vice versa. For instance, the following code can be used to sum up the elements of an array: sum = 0 . D0 i = 1 DO WHILE ( i <=n ) sum = sum + myData ( i ) i = i + 1 END DO 1 2 3 4 5 6 In this example, initializing the counter i and updating its values by incrementing is done manually.
Advanced Finite Element Simulation with MSC Marc: Application of User Subroutines by Zia Javanbakht, Andreas Öchsner