HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 755)

100

101

Page 22-39

The result is:

Ordering the variables in the sub-directory

Running the program MOHRCIRCL for the first time produced a couple of new

variables, PPAR and EQ. These are the Plot PARameter and EQuation

variables necessary to plot the circle. It is suggest that we re-order the

variables in the sub-directory, so that the programs @MOHRC and @PRNST are the

two first variables in the soft-menu key labels. This can be accomplished by

creating the list { MOHRCIRCL PRNST } using: J„ä@MOHRC @PRNST `

And then, ordering the list by using: „°@)@MEM@@ @)@DIR@@ @ORDER.

After this call to the function ORDER is performed, press J. You will now

see that we have the programs MOHRCIRCL and PRNST being the first two

variables in the menu, as we expected.

A second example of Mohr’s circle calculations

Determine the principal stresses for the stress state defined by σ

= 12.5 kPa,

= -6.25 kPa, and τ

= - 5.0 kPa. Draw Mohr’s circle, and determine

from the figure the values of σ’

, σ’

, and τ’

if the angle φ = 35

To determine the principal stresses use the program @PRNST, as follows:

J@PRNST 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 draw Mohr’s circle, use the program @MOHRC, as follows:

1 2 ... 750 751 752 753 754 755 756 757 758 759 760 ... 863 864

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HP 48gII Graphing Calculator Manual do Utilizador Página 755

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