HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 755

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 σxx = 12.5 kPa, σyy = -6.25 kPa, and τxy = - 5.0 kPa. Draw Mohr's circle, and determine from the figure the values of σ'xx, σ'yy, and τ'xy if the angle φ = 35o. To determine the principal stresses use the program @PRNST, as follows: J@PRNST 12.5˜ 6.25\˜ 5\` The result is: Start program PRNST Enter σx = 12.5 Enter σy = -6.25 Enter τxy = -5, and finish data entry. To draw Mohr's circle, use the program @MOHRC, as follows: Page 22-39