Page 127 - Aircraft Stuctures for Engineering Student

Problems 111

Y

Fig. P.4.3

both outer quarters of the span. The beam carries a single central concentrated
load .P.
(a) Derive a formula for the central deflection of the beam, due to P, when simply
supported at each end of the span.
(b) If both ends of the span are encastrk determine the magnitude of the fixed end
moments.
Am. 3PL3/128EI, 5PL/48 (hogging).
P.4.5 The tubular steel post shown in Fig. P.4.5 supports a load of 250 N at the
free end C. The outside diameter of the tube is lOOmm and the wall thickness is
3mm. Neglecting the weight of the tube find the horizontal deflection at C. The
modulus of elasticity is 206 000 N/mm2.
Am. 53.3mm.

Fig. P.4.5