Custom Standard

Standard is a set of checks and items to perform calculations according to formulas and rules.

To add Custom Check execute Standard - Custom from the main menu. Alternatively, use the Standard context menu.

Standard contains:

It is possible to convert a predefined (built-in) standard into Custom. Select standard and execute Convert to Custom from the Standard context menu:

Standard_menu_convert

Constants

Constants is a static value which can be used in checks with the help of Alias. It is useful to create constants and use them in formulas because in case of modifications (related to constants) it is required to make a change in one place only.

Constant dialog box:

Types

Standard type is a list of titles that can be used in classification or characteristic instead of numbers. To add a new type press Add from the menu:

The following dialog window will be displayed:

- add a new item;

- edit the selected item;

- remove the selected item;

Import from another standard - import already existing classification type from existing standards:

Select standard, standard type and press OK to create new standard type.

Copy to standard - export already existing standard type to the existing standards:

 

Characteristics

SDC Verifier allows adding extra properties called Characteristics to use them in Standard check formulas. There are four types of characteristics: Material, Property, Element and Loads.

To add Characteristics use the Characteristics context menu:

All characteristic types except Linked can be created by additional sub types that are taken from Types list. Numeric type is a default type, apply numeric value to elements. Also, it is possible to create a user-defined list of values for characteristic:

Add Material/Property Characteristic:

Set Alias to use characteristic in check formulas.

To plot characteristic values for all materials/properties press .

Add Element characteristic:

- add Node/Element group and set its value:

- edit group elements and value;

- copy selected groups with values;

- remove selected groups;

- preview highlight selected group nodes/elements;

- plot characteristic values of selected groups;

- colored plot with ID label of selected groups;

- colored plot with Value label of selected groups;

Note: Import is available for element type characteristic only with Numeric Type.

Press Import to import Beam Length/Effective Length Factor from Beam Member Finder, Plate Width/Length from Panel Finder or Welds from Weld Finder.

Import removes all previous data from characteristic:

Import dialog box:

If Beam Member data is selected then it is required to select the direction from the list:

Note: For weld finders, only the groups with 0 values will be created.

Classification

Classification is an extra elements characteristic that can be set over directions.

To add classification select type in classification Add menu item:

Standard_classification_add

Numeric classification - is a numeric elements characteristic. It is flexible as it can be used in a creation of any kind of own calculations. It is available for all types of standards. Extra classifications are possible to be created using Types. Different standards have their own predefined classifications. For example DIN 15018 Standard predefined classifications are Element group, Weld Type and Material Type.

Set classification Alias to use it in Custom check formulas.

- add classification condition;

- edit selected condition;

- copy selected conditions;

- remove selected conditions;

- move selected conditions up;

- move selected conditions down.

Note: The first condition cannot be modified, moved, copied or removed.

- highlight selected condition elements;

Press Plot to display values for selected direction.

Note: Values are calculated condition by condition. If the same element is a part of different conditions - the last condition value is taken. If the element does not belong to any condition - the value from the fist condition is taken.

- add a list of conditions with empty classification (one weld one condition) from Weld Finder tool to the list.

Classification Condition

Classification condition is applied to the selected directions of the selected elements.

Define Selection to be used in the condition.

One condition - set the value to the selected directions;

Multiple conditions - select the value for each direction separately. The directions with the same values will be grouped in one condition. Other values will form different conditions.

Standard_classification_conditions

Use All, None, X/Y/XY buttons to operate with selected directions.

Standard Tables

The Standard table is a two-dimensional matrix of static values.

To add Standard Table press Add in Standard Tables context menu:

The following window for parameters setting will be displayed:

Set table Alias to use it in Custom check formulas.

Set count of rows and columns and press Apply to build the table.

Paste full table – paste full table from the clipboard.

Paste cell values – paste values from clipboard to cells starting from top left selected cell.

Note: To cut the table set less value for a row or a column count.

It is possible to define a row and a column headers based on the Types List

Alias

Alias is a unique name for Standard items through which they can be accessed in Custom check formulas.

Note: Alias can contain on letters, digits and underscore symbol ("_"). Alias is unique inside the standard and must be different from the model and result variables such as (Area, Yield, S, Abs, etc.).

Custom Checks

Custom Check

Custom Check is used in SDC Verifier to perform any user-defined calculations. Custom Check consists of Parameters - formulas are made up of model variables, constants and mathematical operations, results and functions.

There are 4 predefined checks: Static Stress Check, Plate Average Stress, Plate Principal Stresses and Solid Principal Stresses.

To create Custom Check execute Add - Custom Check in the Checks context menu:

Standard add custom check | SDC Verifier

Check Alias - variable name to access it from other checks.

Check Calculate Results over Directions (for X, Y, Z, XY, YZ, ZX, Equivalent, Overall directions), otherwise one direction is calculated.

Check Calculate Results over Points (for all element's points of interest), otherwise, one point is calculated.

On Selection (by default all entities) you can define necessary entities.

Note: Calculate Results over Directions and Calculate Results over Points should be defined before the first parameter selected.

Load calculation can be calculated on All Loads or on Load Groups only.

If All Loads option is used then Load Group is calculated as envelope (like in Job), formulas are calculated for Individual Loads, Load Sets but Load Group is min/max/abs among its items.

If Load Groups option is used then formulas are based on group results, e.g. min/max/abs can be used for stresses, strains, line element force and plane element force.

Press to edit multiple parameters (parameters/replacement, category and limits).

Standard set parameter type

To add Parameter to the Custom Check press .  For each parameter, the Title and Alias must be defined. The Alias is a short name of the Parameter to be used in the formulas and must fill the requirements for the variables names - they can contain only letters and digits and underscore.

Replacement - means the outcome is intermediate and not stored. The purpose of the replacement is to be used in other parameters from the current check and don't consume memory.

Standard add parameter

It is possible to create separate formulas for each direction. One formula will be used for all directions if it is inputted into the All Directions text field.

If the formula of a parameter contains logic operations, then the result will be 1 if the condition is fulfilled, else 0 will be assigned to the parameter value.

Note: Formulas in SDC Verifier are case insensitive.

Entities in the Main Functions Toolbox contains the most important functions containing sqrt(), max(),power(), average(), etc.

All available variables of formulas are collected in the Items Toolbox

Mathematical Operations;

Material Variables (contains characteristics, namely Young modulus, Poisson ratio, mass density, shear modulus, yield limit and tensile strength);

Property Variables (contains the characteristics of the Femap Property, such as area for beam type element, thickness for plate element, Cross Section Dimensions, etc.);

Results from other checks;

Constants from Standard;

Characteristic;

Classifications;

Standard Tables;

Inner Constants (Property Shapes, Yes, No, etc.);

Local Check (contains Parameters already defined in the current Check);

Check Parameter.

- Other variables (beam member, shape, load, cycles.

Limits are used to highlight parameters if it exceeds the limit value.

Category defines how parameter will be represented in the table (Number Format) and what Legend Settings will be applied.

E.g. Utilization Factor by default has general format with 2 digits after the dot:

Adding Items

To add a necessary item (all except Results and Check Parameters) press corresponded button on Items dialog box. The dialog window appears:

To Add Check Parameter press . The dialog window appears. In Directions list All is available if the current check is calculated on directions. In Points of Interests list All is available if the current check is calculated on points of interests.

To Add Result press . The dialog window appears. In Directions list All is available if the current check is calculated on directions. In Points of Interests list. All is available if the current check is calculated on points of interests.

Standard_add_result

Once the Parameter is created it can be either edited or removed.

To Edit Parameter press . The dialog box appears where you can select the necessary parameter to edit.

To Delete Parameter press . On the appeared dialog you can define the necessary parameter to remove and press .

Press to move parameters

Parameters can be edited/copied/removed using the popup menu:

Standard_parameters

Warning:

If the formula contains items that do not exist for certain element types (e.g. area does not exist for beams) then the formula will be evaluated with such items replaced with zero.

Check Results:

Table (expand/extreme) - for single load;

Components Extreme Table (over selections);

Flow Table(over loads).

Criteria Plot;

Contour Plot;

Clear Result - remove all check results.

Custom check (no load).

Custom check (no load) ) is a sub-type of Custom Check. Check supports variables that are not based on loads (young modulus, yield stress, property area, a moment of inertia, classification, characteristics, standard table, constants etc.).

Calculate Results over Directions - optional;

Calculate Results over Points - disabled;

Load Calculation - disabled;

Selection - optional;

Property check

Property check is a sub-type of Custom Check. Check supports variables of materials, properties, constants, standard tables. Results are calculated over properties.

Calculate Results over Directions - disabled;

Calculate Results over Points - disabled;

Load Calculation - disabled;

Selection - disabled;

Plate/Stiffener Buckling

The Plate/Stiffener Buckling is used to perform plate buckling calculations with user-defined formulas.

It is very similar to the Custom Check. The major difference is that it is calculated on the section and results presented for the Sections and Plates/Stiffeners. Parameters of plate/stiffener buckling are calculating only for one direction and can use additional variables in formulas: Element Stress (Minimum compression or average) converted into plate direction and Plate dimensions.

To create Plate Buckling check execute Add - Plate/Stiffener Buckling in the Checks context menu:

Standard_custom check add | SDC Verifier

Plate Buckling:

By default, all sections are selected to be checked. Press to change Selection.

Standard select items

Press to edit multiple parameters (parameters/replacement types, category and limits).

To add Parameter press . For each parameter, the Title and Alias must be defined. The Alias is a short name of the Parameter to be used in other formulas and must fill the requirements for the variables names - they can contain only letters and digits and underscore.

Replacement - means the outcome is intermediate and not stored. The purpose of replacement is to be used in other parameters for the current check but the result is not important for the user.

Adding Items

Entities in the Main Functions Toolbox contains the most important functions containing sqrt(), max(),power(), average(), etc.

All available variables of formulas are collected in the Items Toolbox

Mathematical Operations;

Material Variables (contains characteristics, namely Young modulus, Poisson ratio, mass density, shear modulus, yield limit and tensile strength);

Property Variables (contains the characteristics of the Femap Property, such as area for beam type element, thickness for plate element, Cross Section Dimensions, etc.);

Results from plates;

Standard_plbuckling_option

Results from stiffeners;

Standard_plbuckling_option/>

Constants from Standard;

Classifications;

Standard Tables;

Characteristic;

Inner Constants (Property Shapes, Yes, No, etc.);

Local Check (contains Parameters already defined in the current Custom Check);

Recognition data.

Plates:

Standard_plbuckling_option

Stiffeners:

Standard_custom_stiffener_data

Parameters from other checks (of same type) created before.

Limits is used to highlight parameters if it exceeds limit value.

Category defines how parameter will be represented in table (Number Format ) and what Legend Settings will be applied.

To Edit Parameter press . The dialog box appears where you can select the necessary parameter to edit.

To Delete Parameter press . On the appeared dialog you can select the necessary parameter to remove and press .

Press to move parameters

Table (expand / extreme) for single load;

Criteria Plot;

Clear Result - remove all check results.

Available Variables: