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PROBLEM (9.58) Calculate the largest load P that can be applied to the bracket in Fig.
P9.57 if the allowable normal stress at point B is all
σ
= 90 MPa.
SOLUTION
See: Figure, S9.57 of Prob. 9.57:
)32.0()09.0( yx PPM += PPP 31.0)32.0(8.0)09.0(6.0
=
+
=
We have xall
σ
σ
=
or 636
0.31 (0.05)
90 10 510 4.1710
PP
−−
−× =− −
××
from which
kNPall 23=
B
1
/
1
100%