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PROBLEM (9.54) Figure P9.54 shows a cast-iron C clamp. What is the largest permissible
load P that may be applied?
Given: (t
σ
)all = 35 MPa, ( c
σ
)all = 50 MPa, h = 2b = 100 mm
SOLUTION
b=50 mm
h=100 mm
32
50 100 5 10Amm=× =×
364
50(100) 4.17 10
12
z
I
mm==×
636
0.25 (0.05)
35 10 510 4.1710
Az
PMc P P
AI
σ
−−
=× =+ = +
××
or
kNPPP 94.10,003.00002.035
=
+=
kNPPP
B86.17,003.00002.050
=
−
=−=
σ
So, kNPall 94.10=
b
x
0.25 mm
M
h
y
A
P
P
z
B
1
/
1
100%