HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 756)

J@MOHRC Start program PRNST

12.5˜ Enter σx = 12.5

6.25\˜ Enter σy = -6.25

5\` Enter τxy = -5, and finish data entry.

The result is:

To find the values of the stresses corresponding to a rotation of 35

angle of the stressed particle, we use:

$š Clear screen, show PICT in graphics screen

@TRACE @(x,y)@. To move cursor over the circle showing φ and (x,y)

Next, press ™ until you read φ = 35. The corresponding coordinates are

(1.63E0, -1.05E1), i.e., at φ = 35

= 1.63 kPa, and σ’

An input form for the Mohr’s circle program

For a fancier way to input data, we can replace sub-program INDAT, with the

following program that activates an input form:

« “MOHR’S CIRCLE” { { “σx:” “Normal stress in x” 0 }

{ “σy:” “Normal stress in y” 0 } { “τxy:” “Shear stress”

0} } { } { 1 1 1 } { 1 1 1 } INFORM DROP »

With this program substitution, running @MOHRC will produce an input form as

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HP 48gII Graphing Calculator Manual do Utilizador Página 756