641RF nt^E

is a truncated biquadratic whose vertex is with null curvature. 4. Parabolic flexure of a beam and concentrate force F: We obtain t3 dy — 4RF = 0.

121RF at03 E

is a truncated cubical parabola.

5. Equal constraint and parabolic flexure by a line load f: One shows that for the four cases in Table 1.9, the general solution is of the form (Lemaitre [95])

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