Page 50 - Aircraft Stuctures for Engineering Student

Problems 35

It

Fig. P.1.9

QAQ
QwQ
"i-
Equal
distances
Equal distances
//

I
/ I /
Fig. P.1.10

of the beam gave strain readings as follows: E, = -222 x &b = -213 x lop6,
E, = +45 x The longitudinal stress at the point P due to an external compres-
sive force is 7 N/mm'. Calculate the shear stress T at the point P in the vertical plane
and hence the transverse load Q.
(Q = 2bdr/3 where b = breadth, d = depth of beam)
E = 31 000N/mm2, v = 0.2

Ans. T = 3.17N/mm2, Q = 95.1 kN