Prob. 2.6-10. A rigid, weightless beam BD supports a load P

and is, in turn, supported by two hanger rods, (1) and (2), as

shown in Fig. P2.6-10. The rods are initially the same length

L=2 m and are made of the same material. Their rectangu-

lar cross sections have original dimensions (w, 40 mm,

420 mm) and (w₂ 50 mm, 4225 mm), respectively.

LBD 1.5 m. (a) At what location, b, must the load P act if

the rigid bar BD is to remain horizontal when the load is ap-

plied? (b) If the longitudinal strain in the hanger rods is

₁ = = 500μ when the load is P = 205 kN, what is the

value of the modulus of elasticity, E? (c) If application of

load P in the manner described in Parts (a) and (b) above

causes the dimension wy of hanger rod (2) to be reduced

from 50 mm to 49.9918 mm, what is the value of Poisson's

ratio, y, for this material?

(1)

-15

Rigid, weightless

С

P2.6-10

(2)

D