Interactive Roark's Formulas


Interactive Roark's Formulas from Universal Technical Systems, Inc. (UTS) is the only fully automated version of Roark's Formulas for Stress and Strain available today. This powerful solution is available in both a desktop and web version.
UTS has continued to work closely with the authors and publishers of this world-renowned book by creating innovative features that improve a user’s ability to solve and report work in a more productively and efficiently than ever before.

The Superposition Data Entry Wizard (SDEW)

Providing a means of entering data quickly and allowing multiple loads to be handled easily were two goals for this latest release. As a result, the Superposition Data Entry Wizard in Interactive Roark’s formulas is where it all begins. The SDEW works with TK Solver™ ― the underlying math engine ― allowing information to be entered in as few steps as possible. It consists of a series of screens that allows data to be entered both manually or selected from pull down menus. This makes beam and plate solutions simple and quick to use.

The Wizard loads the specific TK Solver model and automatically updates the data, switching between the Wizard and TK Solver as necessary.

Here is a brief overview of the SDEW.

Beams or Plates

The SDEW is activated from the Wizards Menu within TK Solver and can be used for both plates and beams.
Now let’s see how the SDEW actually works by choosing the Beam Data Entry and Superposition as a sample entry.
Select a Case

After making your selection, a new screen appears requesting further information.  (Note that units depend on whether the US or the SI version of Interactive Roark's Formulas has been selected.)
The selections include:

Beam Type -- Select from all the various cases that are available from the pull down menu and note that the Table reference and description provided are exact references to the 7th Edition of Roark's Formulas for Stress and Strain. An accompanying diagram of the system is shown with nomenclature for further clarification.

Support Type and Load Type -- The beam support type and load type are made available in a pull down menu. The options available depend on what is selected and an illustration of that choice is displayed in the diagram of the system.

Material -- Various materials are listed within the pull down menu and include metals, woods, concrete, and other material types. For each material type, the Young's modulus and the Gamma value (if appropriate), are automatically populated upon selection.

If the material type is not available or specific Young's Modulus and or gamma values are required, then these can be entered manually.

At this point, the case has been selected, specific dimensions can be entered, and data solved.

The entry data that appears is specific to the case selected and is dimensionally related. Let’s take a closer look at this model.

Enter Dimensional Data

All of the data that appears in the boxes next to the diagram can be directly entered. Some data (Area Moment of Inertia and Elastic Section Modulus) are dependent on the shape of the cross section of the beam. This can be determined after clicking on Load Cross Section.

The Cross Section is selected from a pull down menu and a diagram is shown below with full nomenclature. The data can be simply entered and once complete, the Done, Return to Beam Inputs is clicked allowing the Area Moment of Inertia and the Elastic Section Modulus to be calculated.

Once all the data has been entered, the condition for this beam type can be calculated by clicking on Solve for Load Condition. This calculates various data such as deflection, bending moment, shear angle etc. The diagrams showing this data can be investigated within TK Solver for further analysis.

Adding Further Loads

If further loads need to be added to the beam, this too can be done within the SDEW.

In the lower left portion of the SDEW is a data entry field for the load number. When a second load is entered (enter 2), this “grays out” all fields that must remain constant for the second load.

After the data has been entered for the second load, the Solve for Load Condition is clicked. This combines the result data for the two load conditions. Clicking on the Show Combined Results displays the individual lists of combined data and their corresponding results. The various TK Solver plots are updated along with the inputs. Further load points can be added or the results can be analyzed and reported in TK Solver.