HP 48gII Graphing Calculator Manual de usuario descargar pdf (Pagina 751)

with respect to segment AB. The coordinates of point A’ will give the values

), while those of B’ will give the values (σ’

The stress condition for which the shear stress, τ’

, is zero, indicated by

segment D’E’, produces the so-called principal stresses, σ

(at point D’) and

(at point E’). To obtain the principal stresses you need to rotate the

coordinate system x’-y’ by an angle φ

, counterclockwise, with respect to the

system x-y. In Mohr’s circle, the angle between segments AC and D’C

The stress condition for which the shear stress, τ’

, is a maximum, is given by

segment F’G’. Under such conditions both normal stresses, σ’

equal. The angle corresponding to this rotation is φ

. The angle between

segment AC and segment F’C in the figure represents 2φ

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HP 48gII Graphing Calculator Manual de usuario Pagina 751