HP 49g+ User Manual page 749

INDAT, MOHRC. Before re-ordering the variables, run the program once by
pressing the soft-key labeled @MOHRC. Use the following:
@MOHRC
25˜
75˜
50`
At this point the program MOHRCIRCL starts calling the sub-programs to
produce the figure. Be patient. The resulting Mohr's circle will look as in the
picture to the left.
Because this view of PICT is invoked through the function PVIEW, we cannot
get any other information out of the plot besides the figure itself.
additional information out of the Mohr's circle, end the program by pressing
$. Then, press š to recover the contents of PICT in the graphics
environment. The Mohr's circle now looks like the picture to the right (see
above).
Press the soft-menu keys @TRACE and @(x,y)@. At the bottom of the screen you will
corresponding to the point A(σx, τxy), i.e.,
find the value of
(2.50E1, 5.00E1).
Press the right-arrow key (™) to increment the value of
corresponding value of (σ'
, τ'
values (σ' ) = (1.00E2, 2.50E1) = (100, 25).
xx xy
o
found at an angle 90
™ key until reaching that value of
= (0, 25).
Launches the main program MOHRCIRCL
Enter σx = 25
Enter σy = 75
Enter τxy = 50, and finish data entry.
, τ'
). For example, for
xx xy
φ
ahead, i.e., where = 45 + 90 = 135
φ , we find (
To obtain
φ = 0,
φ and see the
o
φ
= 45 , we have the
The value of σ'
yy
o
. Press the
, τ'
σ ' ) = (-1.00E-10,-2.5E1)
yy xy
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will be