Android phone, iPhone & iPad
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At a glance: Materials on an Android phone or an iPhone or iPad are described here. The General – Materials section describes aspects of the materials edit facilities that are common to all the hardware platforms.
The main Materials tab
Material names are listed on the Materials tab; one of the main tabs described in the Android phone, iPhone & iPad – Introduction under Lists of Entities.
The Material edit facilities are Entity edit facilities as described in the Android phone, iPhone & iPad – Introduction. Here is an elaboration on that description.
Button – “Import material from another XSF file” on this Materials tab is described in Android phone, iPhone & iPad – Files under Other files.
Material edit facilities
A tap on a material name in the list of materials will open the editor for that material.
On a phone the first of four panels will appear in the display. The first two of these panels contain choices and parameter values that define the material while the third contains a graphic image of the stress/strain relationship and the fourth the numbers represented in that image.
On an iPad a graphic image of the stress/strain relationship occupies the whole display and there is a panel that overlays that image top centre and contains both those first two panels as well as various buttons with self explanatory captions.
First two panels – First panel
At the top of the first panel is a label “Code=” with a selection box. The alternatives offered are the names of various standard code documents that describe a material and also the alternative “Properties as described”.
The alternative “Properties as described” leads to the general material description facilities. This first panel is mostly blank but the information on the other material description panels is all editable. This is very universal so that practically any design code can be accommodated. It is envisaged that the usual materials used at any particular locale will be described with this facility and kept in a xsf file. Once described the materials can be copied into each new job using the “Import material from another xsf file” button on the main materials tab.
With the other alternatives the various parameters defined in the selected code document appear on this first panel in an editable form: the numbers indicating the values having a blue glow. However no other information is editable.
With some of these alternatives in the “code” selection box a second selection box appears with a label “Clause=”. The alternatives offered are references to various parts of the document identified as the “code”.
The alternatives offered are described in General – Materials.
On a phone there is a “Write to text file” button on this first panel.
Button – “Write to text file” near the bottom on this first panel will cause a description of the material to be written to a text file as described in Android phone & iphone – Files, TXT Files.
There is also a next button in the top right corner that will reveal the second panel.
First two panels – Second panel
At the top of the second panel is a label “Material kind=” with a selection box. The alternatives offered are material kinds. Under that is a line indicating a strain parameter depending on the material kind selected.
This is not able to be changed or edited unless the code selection is either “Properties as described” or “Linear elastic”. The alternative material kinds and their strain parameters are:
- “Concrete” the parameter being “ultimate strain”,
- “Steel that yields” the parameter being “yield strain”,
- “Other” does not have a parameter.
If the code and clause selected imply a curved stress/strain relationship a sequence of straight lines approximates the curve. In these cases a heading “Tolerance on curves” appears on this second panel with above and below tolerance values. This is described further in General – Materials, Tolerance on curve, above and below.
Also described in General – Materials is a procedure to describe a material similar to a code material but fully editable. The code material is changed to “Properties as described”.
On a phone this second panel has a next button in the top right corner that will reveal the third panel which presents a graphic image of the stress/strain relationship.
On an iPad the panel containing these first two panel has the following buttons:
Button – “Edit stress/strain” or “Inspect stress/strain” depending on whether or not the information is editable. This will cause the panel containing the first two panels to be hidden and a moveable panel to appear that presents the numbers represented in the graphic image. This is a graphic edit panel as described in the introduction of this volume.
Button – “Write to text file” will cause a description of the material to be written to a text file as described in Android phone, iphone & iPad – Introduction, Files, TXT Files.
Button – “Close material editor” will cause the material editor to be closed. The panel containing the first two panel will disappear and the panel with the main tab buttons will reappear with the materials tab selected.
Stress/Strain relationship graphic image
The stress/strain relationship graphic image includes a grid in green and a blue line to indicate the nominated yield strain or the ultimate compressive strain.
On a phone the image is presented on the third of the four panels. If the information is editable the numbers that are represented on that image are presented on the fourth of the four panels. This is a graphic edit panel as described in the introduction to this volume.
On an iPad the image occupies the whole display. The numbers that are represented are presented on a moveable panel that overlays the image and is a graphic edit panel as described in the introduction to this volume..
If the code selection is “Properties as described” this is editable: the top toolbar has a ‘+’ button and the stress and the strain value have a blue glow being editable.
This data input is completely general so that practically any standard design code can be accommodate.
There are the requirements that the strain values must be in increasing order and if there are both negative and positive strain values zero strain must be included.