CASA Intuition

Structural / Civil Engineering App for aiding the intuitive understanding of the behaviour of space-frames under load.

Aimed at students, CASA Intuition allows the user to create 3D structural models and obtain both a graphical representation of the deflections and forces and also normalised numerical values for easy comparison of effects around the structure.

(Note: no actual analysis results are given.)

More information about this App can be found in its integrated help and on our website. The App also contains "Replay Demonstrations" which describe and enact its use.


=== General Technical Features ===

* Automatic analysis.

* Integrated extensive section library:
- British, European, American, Canadian, Australian, South African, Japanese, Russian.
- See our website for the range of shapes.
(Displayed property values are normalised and for comparison purposes only.)

* Integrated section generator for common shapes:
- Open: I/H, channel, zed, angle, tee.
- Hollow: Oval, Rectangular.
- Solid: Oval, Rectangular.
- Calculates: Area, Inertia, Torsional constant, Elastic moduli, mass.
(Displayed property values are normalised and for comparison purposes only.)

* Integrated material library:
- Steel, Aluminium, Concrete, Timber, Glass.

* Member ends can be rigid or pinned.

* Loads applied as point, couple, trapezoid.

* Multiple load-cases.

* Gravity (self-weight) loading.
(Numerical values are not actual; they are normalised for comparison purposes only.)

* Graphical and numerical results include:
- Reactions, deflections, bending moments, shear forces, bending stress.
- Points of interest.
- Results given all along members.
(Numerical values are not actual; they are normalised for comparison purposes only.)

=== General User Interface Features ===

* Universal App - for iPhone, iPod touch, and iPad.

* Metric & imperial units.

* Four simple interactive screens:
- Geometry, Loading, Results: for interacting with the model.
- Utilities: Supplementary functions (see below).

* Easy modelling:
- Tap to select; tap to edit.
- Move and copy geometry.
- Slide nodes along members.
- Change member spans.
- Split members.
- Replicate loading across members.

* Graphical drag-and-tap controls:
- Rotate, pan, zoom the view with simple gestures.
- Drag nodes for positions.
- Drag loads for positions and magnitudes.
- Drag marker along member to read off results values.
- Tap on Points of Interest for important results.
 - Select nodes to measure distances, angles, and areas between them.

* Numeric entry available:
- Double-tap on a datum to enter its numerical value.
- Includes a convenient built-in calculator.

* Straightforward section library:
- Pick from country, shape, and size.
- View diagram and properties.
- For custom shapes, double-tap on dimensions to edit.
- Axes can be rotated by 90 degrees.

* Report generation:
- Configurable content.
- Graphical layout.
- On-screen preview.
- Export PDF by e-mail.
- AirPrint.
(Numerical values are normalised and for comparison purposes only.)

* Supplementary functions:
- Document titles.
- Choice of unit system (UK/EU Metric, US Imperial).
- On-line help.
- Load and save models.

更新履歴
Maintenance update.

The app now uses the standard iOS file browser, and we recommend saving any current documents and closing the app prior to updating. On first launch, if it opens in the "Recents" files tab, then browse to "On my iPad" and then to this app's documents. If the app were not fully closed prior to updating then the documents folder may appear empty when first opened, in which case close the app in the iOS home page and relaunch it.