This page has been superseded by Materials in the Android phone, iPhone & iPad volume

Android phone & iPhone

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At a glance: Materials on an Android phone or an  iPhone 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 – Introduction under Lists of Entities.

The Material edit facilities are Entity edit facilities as described in the Android phone & iPhone – 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 – Files under Other files.

Material edit facility – First display

At the top of the first display is a label “Code=” and the words “Properties as described” or alternatively the name of a standard code that describes a material. A tap on those words or that name will reveal a list of other alternatives that can be selected.

The alternative “Properties as described” leads to the general material description facilities. This first display is mostly blank but the information on the other material description displays 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 in the “code” list the various parameters defined in the selected code appear on this first display in an editable form: the numbers indicating the values having a blue glow indicating they can be edited. However generally no other information is editable. The alternatives offered are described in General – Materials .

Button – “Write to text file” near the bottom on this first display will cause a description of the material to be written to a text file as described in Android phone & iphone –  Files, Text Files.

The next > button in the top right corner will reveal the second display.

Material edit facility – Second display

At the top of the second display is a label “Material kind=” and the name of a material kind. Under that is a line indicating a strain parameter depending on the material kind.

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 display 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”.

The next > button in the top right corner will reveal the third display which is a graphic display of the stress/strain relationship.

Material edit facility – Third and fourth displays

The third display is a graphic display of the stress/strain relationship This is as described in Android phone & iPhone – Introduction, Graphical information. If the code selection is “Properties as described” this is editable and the next display, a fourth display is available for keying in numbers as described in iPhone – Introduction, Graphical information.

The strain values must be in increasing order. Also if there are both negative and positive strain values zero strain must be included.

This is described further in General – Materials, The general stress/strain relationship